trouble with screen recording on Wayland #4104

infrared commented 2025年11月06日 22:30:37 +01:00

Hello, I used to be able to do screen recording with simplescreenrecorder. Now that the system default for GNOME is wayland, I am having trouble figuring out how to screen recording with any program in the Guix repo. With simplescreenrecorder, the output file is the correct length but is only blank video. Likewise with recordmydesktop. I tried wf-recorder as well, but it just gives me the error "compositor doesn't support wlr-screencopy-unstable-v1".

I don't really want to switch my system back to x11 — assuming that is still possible — so I am wondering what is the path forward.

Here is my system information:

christopher@theoden 
------------------- 
OS: Guix System x86_64 
Host: OptiPlex 9020 00 
Kernel: 6.16.8-gnu 
Uptime: 28 days, 4 hours, 53 mins 
Packages: 157 (guix-system) 
Shell: bash 5.2.37 
Resolution: 1920x1080 
DE: GNOME 
WM: Mutter 
Terminal: kgx 
CPU: Intel i5-4570 (4) @ 3.600GHz 
GPU: AMD ATI Radeon HD 8490 / R5 235X OEM 
GPU: Intel HD Graphics 
Memory: 8454MiB / 15906MiB 

Generation 160	Oct 08 2025 11:46:46	(current)
 guix 5cc880f
 repository URL: https://git.guix.gnu.org/guix.git
 branch: master
 commit: 5cc880f938f491afce519fb0c528dbd87ec9d7a3

Hello, I used to be able to do screen recording with simplescreenrecorder. Now that the system default for GNOME is wayland, I am having trouble figuring out how to screen recording with any program in the Guix repo. With simplescreenrecorder, the output file is the correct length but is only blank video. Likewise with recordmydesktop. I tried wf-recorder as well, but it just gives me the error "compositor doesn't support wlr-screencopy-unstable-v1". I don't really want to switch my system back to x11 — assuming that is still possible — so I am wondering what is the path forward. Here is my system information: ``` christopher@theoden ------------------- OS: Guix System x86_64 Host: OptiPlex 9020 00 Kernel: 6.16.8-gnu Uptime: 28 days, 4 hours, 53 mins Packages: 157 (guix-system) Shell: bash 5.2.37 Resolution: 1920x1080 DE: GNOME WM: Mutter Terminal: kgx CPU: Intel i5-4570 (4) @ 3.600GHz GPU: AMD ATI Radeon HD 8490 / R5 235X OEM GPU: Intel HD Graphics Memory: 8454MiB / 15906MiB ``` ``` guix describe Generation 160 Oct 08 2025 11:46:46 (current) guix 5cc880f repository URL: https://git.guix.gnu.org/guix.git branch: master commit: 5cc880f938f491afce519fb0c528dbd87ec9d7a3 ```

allana commented 2025年11月07日 10:29:13 +01:00

Hi, according to the simplescreenrecorder Troubleshooting guide, I think that it won't be possible to use it with wayland.

The recording is completely black (except for the cursor)
Some Linux distributions (e.g. Ubuntu 17.10) will by default use the Wayland display server. Since Wayland doesn't provide a standardized API for screen capturing, SSR can't support it (yet). The solution is to switch back to the X11 display server. On Ubuntu, this can be done by logging out, clicking the 'gear' icon on the login screen and selecting 'Ubuntu on Xorg', and logging back in. This is explained in more detail here.

Hi, according to the `simplescreenrecorder` [Troubleshooting guide](https://www.maartenbaert.be/simplescreenrecorder/troubleshooting/), I think that it won't be possible to use it with wayland. > The recording is completely black (except for the cursor) Some Linux distributions (e.g. Ubuntu 17.10) will by default use the Wayland display server. Since Wayland doesn't provide a standardized API for screen capturing, SSR can't support it (yet). The solution is to switch back to the X11 display server. On Ubuntu, this can be done by logging out, clicking the 'gear' icon on the login screen and selecting 'Ubuntu on Xorg', and logging back in. This is explained in more detail here.

po1onius commented 2025年11月07日 16:54:52 +01:00

I installed the package obs and obs-wlrobs. I'm using mangowc windows manager. The screen recording works well (if I remember correctly, a reboot was required after installing these two packages).

I installed the package `obs` and `obs-wlrobs`. I'm using [mangowc](https://github.com/DreamMaoMao/mangowc) windows manager. The screen recording works well (if I remember correctly, a reboot was required after installing these two packages).

infrared commented 2025年11月07日 21:42:55 +01:00

I'm having trouble with obs — with obs-wlrobs. Two Wayland output sources are available — scpy and dmabuf. If I add either of these to the sources list, I immediately get a segfault. If I restart obs, the source is still added. When I click Start Recording, it seems to be recording something to the mp4 file, but when I open the file, I see only a black screen. Also, the preview screen in OBS shows only black.

If I try to open the settings for the source I've selected, it segaults.

Not sure if the segfault is a related issue or not. It seems like there is something about my computer that none of the screen recorders are able to work with. Are there any others who could test obs under GNOME? Maybe it is a GNOME specific problem?

I'm having trouble with obs — with obs-wlrobs. Two Wayland output sources are available — scpy and dmabuf. If I add either of these to the sources list, I immediately get a segfault. If I restart obs, the source is still added. When I click Start Recording, it seems to be recording something to the mp4 file, but when I open the file, I see only a black screen. Also, the preview screen in OBS shows only black. If I try to open the settings for the source I've selected, it segaults. Not sure if the segfault is a related issue or not. It seems like there is something about my computer that none of the screen recorders are able to work with. Are there any others who could test obs under GNOME? Maybe it is a GNOME specific problem?

kestrelwx commented 2025年11月08日 17:39:32 +01:00

Can you confirm you don't see a screencast option in the Gnome screenshot tool?

Can you confirm you don't see a screencast option in the Gnome screenshot tool?

infrared commented 2025年11月10日 22:01:25 +01:00

If I use keyboard shortcut CNTL-ALT-SHIFT R, the dialog pops up for recording the screen. But when I click the record button, I immediately get a GNOME notification "Screencast failed to start", without any further details or explanation.

If I use keyboard shortcut CNTL-ALT-SHIFT R, the dialog pops up for recording the screen. But when I click the record button, I immediately get a GNOME notification "Screencast failed to start", without any further details or explanation.

kestrelwx commented 2025年11月15日 20:44:28 +01:00

Do you have the issue on current master too? Could you show the console output from OBS? For Wayland screen recording you need Pipewire, a DBus service and XDG Desktop Portal. Moreover, I'm guessing wlrobs is a plugin specifically for wlroots compositors, which GNOME's, I believe, Mutter isn't. So you would expect screen capture in OBS to be availabe through Pipewire without the plugin. If you could show your system and home configurations sans personal information, that'd be helpful too. I haven't tried GNOME myself, but in #347 screen recording is reported to work. I don't know where to see GNOME Shell's logs for troubleshooting, unfortunately.

Do you have the issue on current master too? Could you show the console output from OBS? For Wayland screen recording you need Pipewire, a DBus service and XDG Desktop Portal. Moreover, I'm guessing `wlrobs` is a plugin specifically for `wlroots` compositors, which GNOME's, I believe, Mutter isn't. So you would expect screen capture in OBS to be availabe through Pipewire without the plugin. If you could show your system and home configurations sans personal information, that'd be helpful too. I haven't tried GNOME myself, but in https://codeberg.org/guix/guix/issues/347 screen recording is reported to work. I don't know where to see GNOME Shell's logs for troubleshooting, unfortunately.

infrared commented 2025年11月25日 18:17:32 +01:00

Yesterday I did a guix pull, a home reconfigure, and a system reconfigure, with a reboot.

This time, my system config file included the "wayland #f" option. I going to remove that, and then recompile to try this again with wayland. With "wayland #f" I am able to use simplescreenrecorder, though the GNOME screen recording tool still gives the error "Screencast fails to start".

Here is my system config file, with some IP addresses scrubbed out:

;; -*- geiser-scheme-implementation: guile -*-
(use-modules (gnu)
	 (gnu packages cups)
 (gnu packages databases)
	 (gnu packages gnome)
 ;; (gnu packages lxqt)
	 (gnu packages scanner))
(use-service-modules desktop databases networking ssh xorg cups)
(operating-system
 (locale "en_US.utf8")
 (timezone "America/Anchorage")
 (keyboard-layout
 (keyboard-layout "us" "altgr-intl" #:options '("ctrl:swapcaps")))
 (bootloader
 (bootloader-configuration
 (bootloader grub-bootloader)
 (targets (list "/dev/sda"))
 (keyboard-layout keyboard-layout)))
 ;; (kernel (specification->package "linux-libre@5.15"))
 (kernel-arguments (cons "cpufreq.default_governor=conservative"
			 %default-kernel-arguments))
 (mapped-devices
 (list (mapped-device
 (source
 (uuid "32325179-3734-4223-9d4a-fe15aeca876a"))
 (target "cryptroot")
 (type luks-device-mapping))))
 (file-systems
 (cons* (file-system
 (mount-point "/")
 (device "/dev/mapper/cryptroot")
 (type "ext4")
 (dependencies mapped-devices))
;	 %fuse-control-file-system
 %base-file-systems))
 (host-name "theoden")
 (users (cons* (user-account
		 (name "christopher")
		 (comment "Christopher Howard")
		 (group "users")
		 (home-directory "/home/christopher")
		 (supplementary-groups
		 '("wheel" "netdev" "audio" "video"
		 "dialout" "lp" "disk" "floppy"
		 "cdrom" "lpadmin" "kvm")))
		%base-user-accounts))
 (packages
 (append
 (list
 (list (specification->package "bind") "utils"))
 (append
 (map specification->package
	 '("cups"
	 "dosfstools"
	 "ed"
	 "evolution"
	 "evolution-data-server"
	 "file"
 "font-ghostscript"
	 "font-gnu-freefont"
	 "font-google-noto"
 "font-google-noto-emoji"
	 "gnome-tweaks"
	 "gsettings-desktop-schemas"
 "inotify-tools"
 "intel-vaapi-driver"
 "iotop"
 "libva"
 "libva-utils"
 "mesa-utils"
	 "mg"
	 "neofetch"
	 "procenv"
	 "recutils"
	 "sane-backends"
	 "screen"
	 "seahorse"
	 "simple-scan"
	 "torsocks"
	 "tmon"
	 "tree"
	 "turbostat"
	 "wget"))
 %base-packages)))
 (services
 (modify-services
 (cons*
 (service gnome-desktop-service-type)
 ;; (service lxqt-desktop-service-type)
 (service tor-service-type)
 (service rngd-service-type)
 (service openssh-service-type)
 (set-xorg-configuration
 (xorg-configuration
 (keyboard-layout keyboard-layout)))
 (service cups-service-type
	 (cups-configuration
	 (web-interface? #t)
	 (log-level 'debug)
	 (access-log-level 'all)
	 (extensions
	 (list hplip-minimal cups-filters))))
 ;; (service postgresql-service-type
 ;; (postgresql-configuration
 ;; (postgresql postgresql-10)))
 (simple-service 'add-extra-hosts
 hosts-service-type
 (list (host "<scrubbed>" "q4os")
 (host "<scrubbed>" "guix-serial")))
 (udev-rules-service
 'usbasp
 (udev-rule
 "99-USBasp.rules"
 (string-append
 "SUBSYSTEM==\"usb\", ENV{DEVTYPE}==\"usb_device\", "
 "ATTRS{idVendor}==\"16c0\", ATTRS{idProduct}==\"05dc\", "
 "MODE=\"0666\"")))
 (udev-rules-service
 'usbsigrok
 (udev-rule
 "99-USBsigrok.rules"
 (string-append
 "SUBSYSTEM==\"usb\", ENV{DEVTYPE}==\"usb_device\", "
 "ATTRS{idVendor}==\"0925\", ATTRS{idProduct}==\"3881\", "
 "MODE=\"0666\"")))
 (udev-rules-service
 'usbsigrok
 (udev-rule
 "99-USBkingst.rules"
 (string-append
 "SUBSYSTEM==\"usb\", ENV{DEVTYPE}==\"usb_device\", "
 "ATTRS{idVendor}==\"77a1\", ATTRS{idProduct}==\"01a2\", "
 "MODE=\"0666\"")))
 
 %desktop-services)
 (udev-service-type
 config =>
 (udev-configuration
 (inherit config)
 (rules (cons sane-backends
		 (udev-configuration-rules config)))))
 (gdm-service-type
 config =>
 (gdm-configuration
 (wayland? #f)))
 #;(guix-service-type
 config =>
 (guix-configuration
 (inherit config)
 (extra-options (list "--gc-keep-outputs=yes")))))))

Yesterday I did a guix pull, a home reconfigure, and a system reconfigure, with a reboot. This time, my system config file included the "wayland #f" option. I going to remove that, and then recompile to try this again with wayland. With "wayland #f" I am able to use simplescreenrecorder, though the GNOME screen recording tool still gives the error "Screencast fails to start". Here is my system config file, with some IP addresses scrubbed out: ``` ;; -*- geiser-scheme-implementation: guile -*- (use-modules (gnu) (gnu packages cups) (gnu packages databases) (gnu packages gnome) ;; (gnu packages lxqt) (gnu packages scanner)) (use-service-modules desktop databases networking ssh xorg cups) (operating-system (locale "en_US.utf8") (timezone "America/Anchorage") (keyboard-layout (keyboard-layout "us" "altgr-intl" #:options '("ctrl:swapcaps"))) (bootloader (bootloader-configuration (bootloader grub-bootloader) (targets (list "/dev/sda")) (keyboard-layout keyboard-layout))) ;; (kernel (specification->package "linux-libre@5.15")) (kernel-arguments (cons "cpufreq.default_governor=conservative" %default-kernel-arguments)) (mapped-devices (list (mapped-device (source (uuid "32325179-3734-4223-9d4a-fe15aeca876a")) (target "cryptroot") (type luks-device-mapping)))) (file-systems (cons* (file-system (mount-point "/") (device "/dev/mapper/cryptroot") (type "ext4") (dependencies mapped-devices)) ; %fuse-control-file-system %base-file-systems)) (host-name "theoden") (users (cons* (user-account (name "christopher") (comment "Christopher Howard") (group "users") (home-directory "/home/christopher") (supplementary-groups '("wheel" "netdev" "audio" "video" "dialout" "lp" "disk" "floppy" "cdrom" "lpadmin" "kvm"))) %base-user-accounts)) (packages (append (list (list (specification->package "bind") "utils")) (append (map specification->package '("cups" "dosfstools" "ed" "evolution" "evolution-data-server" "file" "font-ghostscript" "font-gnu-freefont" "font-google-noto" "font-google-noto-emoji" "gnome-tweaks" "gsettings-desktop-schemas" "inotify-tools" "intel-vaapi-driver" "iotop" "libva" "libva-utils" "mesa-utils" "mg" "neofetch" "procenv" "recutils" "sane-backends" "screen" "seahorse" "simple-scan" "torsocks" "tmon" "tree" "turbostat" "wget")) %base-packages))) (services (modify-services (cons* (service gnome-desktop-service-type) ;; (service lxqt-desktop-service-type) (service tor-service-type) (service rngd-service-type) (service openssh-service-type) (set-xorg-configuration (xorg-configuration (keyboard-layout keyboard-layout))) (service cups-service-type (cups-configuration (web-interface? #t) (log-level 'debug) (access-log-level 'all) (extensions (list hplip-minimal cups-filters)))) ;; (service postgresql-service-type ;; (postgresql-configuration ;; (postgresql postgresql-10))) (simple-service 'add-extra-hosts hosts-service-type (list (host "<scrubbed>" "q4os") (host "<scrubbed>" "guix-serial"))) (udev-rules-service 'usbasp (udev-rule "99-USBasp.rules" (string-append "SUBSYSTEM==\"usb\", ENV{DEVTYPE}==\"usb_device\", " "ATTRS{idVendor}==\"16c0\", ATTRS{idProduct}==\"05dc\", " "MODE=\"0666\""))) (udev-rules-service 'usbsigrok (udev-rule "99-USBsigrok.rules" (string-append "SUBSYSTEM==\"usb\", ENV{DEVTYPE}==\"usb_device\", " "ATTRS{idVendor}==\"0925\", ATTRS{idProduct}==\"3881\", " "MODE=\"0666\""))) (udev-rules-service 'usbsigrok (udev-rule "99-USBkingst.rules" (string-append "SUBSYSTEM==\"usb\", ENV{DEVTYPE}==\"usb_device\", " "ATTRS{idVendor}==\"77a1\", ATTRS{idProduct}==\"01a2\", " "MODE=\"0666\""))) %desktop-services) (udev-service-type config => (udev-configuration (inherit config) (rules (cons sane-backends (udev-configuration-rules config))))) (gdm-service-type config => (gdm-configuration (wayland? #f))) #;(guix-service-type config => (guix-configuration (inherit config) (extra-options (list "--gc-keep-outputs=yes"))))))) ```

infrared commented 2025年11月25日 18:31:09 +01:00

I did a reconfigure using wayland. The GNOME screenshot recording tool is still giving me the error "Screencast failed to start".

Here is the console output from obs. The behavior is still the same as before, where adding a Wayland recording source causes a segfault. If I restart, I am able to proceed to making the recording, but there is nothing being recorded, only a blank black screen.

christopher@theoden ~$ obs
debug: Found dbus service: org.freedesktop.ScreenSaver
debug: Attempted path: /gnu/store/m81cmbp0x7417j82hsrjxj8z24r3r222-obs-32.0.1/bin/../share/obs/obs-studio/locale/en-US.ini
debug: Attempted path: /gnu/store/m81cmbp0x7417j82hsrjxj8z24r3r222-obs-32.0.1/bin/../share/obs/obs-studio/locale.ini
debug: Attempted path: /gnu/store/m81cmbp0x7417j82hsrjxj8z24r3r222-obs-32.0.1/bin/../share/obs/obs-studio/themes
debug: Attempted path: /gnu/store/m81cmbp0x7417j82hsrjxj8z24r3r222-obs-32.0.1/bin/../share/obs/obs-studio/themes/
info: Platform: Wayland
info: CPU Name: Intel(R) Core(TM) i5-4570 CPU @ 3.20GHz
info: CPU Speed: 1496.657MHz
info: Physical Cores: 4, Logical Cores: 4
info: Physical Memory: 15906MB Total, 13955MB Free
info: Kernel Version: Linux 6.17.8-gnu
info: Distribution: "Guix System" Unknown
info: Desktop Environment: GNOME (gnome)
info: Session Type: wayland
info: Current Date/Time: 2025年11月25日, 08:24:04 AM
info: Browser Hardware Acceleration: true
info: Qt Version: 6.9.2 (runtime), 6.9.2 (compiled)
info: Portable mode: false
info: OBS 32.0.1 (linux)
info: ---------------------------------
info: ---------------------------------
info: audio settings reset:
	samples per sec: 48000
	speakers: 2
	max buffering: 960 milliseconds
	buffering type: dynamically increasing
info: ---------------------------------
info: Initializing OpenGL...
info: Using EGL/Wayland
info: Initialized EGL 1.5
info: Loading up OpenGL on adapter Intel Mesa Intel(R) HD Graphics 4600 (HSW GT2)
info: OpenGL loaded successfully, version 4.6 (Core Profile) Mesa 25.2.3, shading language 4.60
info: ---------------------------------
info: video settings reset:
	base resolution: 1920x1080
	output resolution: 1280x720
	downscale filter: Bicubic
	fps: 30/1
	format: NV12
	YUV mode: Rec. 709/Partial
info: NV12 texture support enabled
info: P010 texture support not available
info: Audio monitoring device:
	name: Default
	id: default
info: ---------------------------------
warning: Failed to load 'en-US' text for module: 'decklink-captions.so'
warning: Failed to load 'en-US' text for module: 'decklink-output-ui.so'
libDeckLinkAPI.so: cannot open shared object file: No such file or directory
warning: A DeckLink iterator could not be created. The DeckLink drivers may not be installed
warning: Failed to initialize module 'decklink.so'
info: [pipewire] Available capture sources:
info: [pipewire] - Monitor source
info: [pipewire] - Window source
warning: v4l2loopback not installed, virtual camera not registered
info: VAAPI: API version 1.22
info: FFmpeg VAAPI H264 encoding supported
info: FFmpeg VAAPI AV1 encoding not supported
info: FFmpeg VAAPI HEVC encoding not supported
info: [vlc-video]: VLC 3.0.21 Vetinari found, VLC video source enabled
info: ---------------------------------
info: Loaded Modules:
info: vlc-video.so
info: text-freetype2.so
info: rtmp-services.so
info: obs-x264.so
info: obs-webrtc.so
info: obs-vst.so
info: obs-transitions.so
info: obs-outputs.so
info: obs-filters.so
info: obs-ffmpeg.so
info: linux-v4l2.so
info: linux-pulseaudio.so
info: linux-pipewire.so
info: linux-capture.so
info: linux-alsa.so
info: libwlrobs.so
info: image-source.so
info: frontend-tools.so
info: decklink-output-ui.so
info: decklink-captions.so
info: ---------------------------------
info: ---------------------------------
info: Available Encoders:
info: Video Encoders:
info: 	- ffmpeg_svt_av1 (SVT-AV1)
info: 	- ffmpeg_aom_av1 (AOM AV1)
info: 	- ffmpeg_vaapi_tex (FFmpeg VAAPI H.264)
info: 	- obs_x264 (x264)
info: Audio Encoders:
info: 	- ffmpeg_aac (FFmpeg AAC)
info: 	- ffmpeg_opus (FFmpeg Opus)
info: 	- ffmpeg_pcm_s16le (FFmpeg PCM (16-bit))
info: 	- ffmpeg_pcm_s24le (FFmpeg PCM (24-bit))
info: 	- ffmpeg_pcm_f32le (FFmpeg PCM (32-bit float))
info: 	- ffmpeg_alac (FFmpeg ALAC (24-bit))
info: 	- ffmpeg_flac (FFmpeg FLAC (16-bit))
info: ==== Startup complete ===============================================
info: All scene data cleared
info: ------------------------------------------------
info: pulse-input: Server name: 'pulseaudio 16.1'
info: pulse-input: Audio format: s16le, 44100 Hz, 2 channels
info: pulse-input: Started recording from 'alsa_output.pci-0000_00_1b.0.analog-stereo.monitor' (default)
info: [Loaded global audio device]: 'Desktop Audio'
info: Switched to scene 'Scene'
info: ------------------------------------------------
info: Loaded scenes:
info: - scene 'Scene':
info: - source: 'Wayland output(scpy)' (wlrobs-scpy)
info: ------------------------------------------------
info: Device for 'Audio Output Capture' source is also used for audio monitoring:
Deduplication logic is being applied to all monitored sources.
info: ---------------------------------
info: [x264 encoder: 'simple_video_recording'] preset: veryfast
info: [x264 encoder: 'simple_video_recording'] profile: high
info: [x264 encoder: 'simple_video_recording'] settings:
	rate_control: CRF
	bitrate: 0
	buffer size: 0
	crf: 21
	fps_num: 30
	fps_den: 1
	width: 1280
	height: 720
	keyint: 250
info: ---------------------------------
info: [FFmpeg aac encoder: 'simple_aac_recording0'] bitrate: 192, channels: 2, channel_layout: stereo, track: 1
info: ==== Recording Start ===============================================
info: [mp4 output: 'simple_file_output'] Writing Hybrid MP4/MOV file '/home/christopher/2025-11-25 08-24-21.mp4'...
info: [mp4 muxer: 'simple_file_output'] Flushing final fragment...
info: [mp4 muxer: 'simple_file_output'] Number of fragments: 2
info: [mp4 muxer: 'simple_file_output'] Full moov size: 6 KiB
info: [mp4 muxer: 'simple_file_output'] Final mdat size: 22 KiB
info: Output 'simple_file_output': stopping
info: Output 'simple_file_output': Total frames output: 308
info: Output 'simple_file_output': Total drawn frames: 328 (329 attempted)
info: Output 'simple_file_output': Number of lagged frames due to rendering lag/stalls: 1 (0.3%)
info: [mp4 output: 'simple_file_output'] Waiting for file writer to finish...
info: ==== Recording Stop ================================================
info: [mp4 output: 'simple_file_output'] File output complete. Finalization took 5 ms.
[aac @ 0xfa6bd80] Qavg: 65536.000
[aac @ 0xfa6bd80] 2 frames left in the queue on closing
info: User Removed source 'Wayland output(scpy)' (wlrobs-scpy) from scene 'Scene'
info: User added source 'Wayland output(dmabuf)' (wlrobs-dmabuf) to scene 'Scene'
Segmentation fault
christopher@theoden ~$ obs
debug: Found dbus service: org.freedesktop.ScreenSaver
debug: Attempted path: /gnu/store/m81cmbp0x7417j82hsrjxj8z24r3r222-obs-32.0.1/bin/../share/obs/obs-studio/locale/en-US.ini
debug: Attempted path: /gnu/store/m81cmbp0x7417j82hsrjxj8z24r3r222-obs-32.0.1/bin/../share/obs/obs-studio/locale.ini
debug: Attempted path: /gnu/store/m81cmbp0x7417j82hsrjxj8z24r3r222-obs-32.0.1/bin/../share/obs/obs-studio/themes
debug: Attempted path: /gnu/store/m81cmbp0x7417j82hsrjxj8z24r3r222-obs-32.0.1/bin/../share/obs/obs-studio/themes/
warning: Crash or unclean shutdown detected
warning: [Safe Mode] Normal launch selected, loading third-party plugins is enabled
info: Platform: Wayland
info: CPU Name: Intel(R) Core(TM) i5-4570 CPU @ 3.20GHz
info: CPU Speed: 798.251MHz
info: Physical Cores: 4, Logical Cores: 4
info: Physical Memory: 15906MB Total, 14045MB Free
info: Kernel Version: Linux 6.17.8-gnu
info: Distribution: "Guix System" Unknown
info: Desktop Environment: GNOME (gnome)
info: Session Type: wayland
info: Current Date/Time: 2025年11月25日, 08:24:57 AM
info: Browser Hardware Acceleration: true
info: Qt Version: 6.9.2 (runtime), 6.9.2 (compiled)
info: Portable mode: false
info: OBS 32.0.1 (linux)
info: ---------------------------------
info: ---------------------------------
info: audio settings reset:
	samples per sec: 48000
	speakers: 2
	max buffering: 960 milliseconds
	buffering type: dynamically increasing
info: ---------------------------------
info: Initializing OpenGL...
info: Using EGL/Wayland
info: Initialized EGL 1.5
info: Loading up OpenGL on adapter Intel Mesa Intel(R) HD Graphics 4600 (HSW GT2)
info: OpenGL loaded successfully, version 4.6 (Core Profile) Mesa 25.2.3, shading language 4.60
info: ---------------------------------
info: video settings reset:
	base resolution: 1920x1080
	output resolution: 1280x720
	downscale filter: Bicubic
	fps: 30/1
	format: NV12
	YUV mode: Rec. 709/Partial
info: NV12 texture support enabled
info: P010 texture support not available
info: Audio monitoring device:
	name: Default
	id: default
info: ---------------------------------
warning: Failed to load 'en-US' text for module: 'decklink-captions.so'
warning: Failed to load 'en-US' text for module: 'decklink-output-ui.so'
libDeckLinkAPI.so: cannot open shared object file: No such file or directory
warning: A DeckLink iterator could not be created. The DeckLink drivers may not be installed
warning: Failed to initialize module 'decklink.so'
info: [pipewire] Available capture sources:
info: [pipewire] - Monitor source
info: [pipewire] - Window source
warning: v4l2loopback not installed, virtual camera not registered
info: VAAPI: API version 1.22
info: FFmpeg VAAPI H264 encoding supported
info: FFmpeg VAAPI AV1 encoding not supported
info: FFmpeg VAAPI HEVC encoding not supported
info: [vlc-video]: VLC 3.0.21 Vetinari found, VLC video source enabled
info: ---------------------------------
info: Loaded Modules:
info: vlc-video.so
info: text-freetype2.so
info: rtmp-services.so
info: obs-x264.so
info: obs-webrtc.so
info: obs-vst.so
info: obs-transitions.so
info: obs-outputs.so
info: obs-filters.so
info: obs-ffmpeg.so
info: linux-v4l2.so
info: linux-pulseaudio.so
info: linux-pipewire.so
info: linux-capture.so
info: linux-alsa.so
info: libwlrobs.so
info: image-source.so
info: frontend-tools.so
info: decklink-output-ui.so
info: decklink-captions.so
info: ---------------------------------
info: ---------------------------------
info: Available Encoders:
info: Video Encoders:
info: 	- ffmpeg_svt_av1 (SVT-AV1)
info: 	- ffmpeg_aom_av1 (AOM AV1)
info: 	- ffmpeg_vaapi_tex (FFmpeg VAAPI H.264)
info: 	- obs_x264 (x264)
info: Audio Encoders:
info: 	- ffmpeg_aac (FFmpeg AAC)
info: 	- ffmpeg_opus (FFmpeg Opus)
info: 	- ffmpeg_pcm_s16le (FFmpeg PCM (16-bit))
info: 	- ffmpeg_pcm_s24le (FFmpeg PCM (24-bit))
info: 	- ffmpeg_pcm_f32le (FFmpeg PCM (32-bit float))
info: 	- ffmpeg_alac (FFmpeg ALAC (24-bit))
info: 	- ffmpeg_flac (FFmpeg FLAC (16-bit))
info: ==== Startup complete ===============================================
info: All scene data cleared
info: ------------------------------------------------
info: pulse-input: Server name: 'pulseaudio 16.1'
info: pulse-input: Audio format: s16le, 44100 Hz, 2 channels
info: pulse-input: Started recording from 'alsa_output.pci-0000_00_1b.0.analog-stereo.monitor' (default)
info: [Loaded global audio device]: 'Desktop Audio'
info: Switched to scene 'Scene'
info: ------------------------------------------------
info: Loaded scenes:
info: - scene 'Scene':
info: - source: 'Wayland output(dmabuf)' (wlrobs-dmabuf)
info: ------------------------------------------------
info: Device for 'Audio Output Capture' source is also used for audio monitoring:
Deduplication logic is being applied to all monitored sources.
info: adding 21 milliseconds of audio buffering, total audio buffering is now 21 milliseconds (source: Desktop Audio)
info: ---------------------------------
info: [x264 encoder: 'simple_video_recording'] preset: veryfast
info: [x264 encoder: 'simple_video_recording'] profile: high
info: [x264 encoder: 'simple_video_recording'] settings:
	rate_control: CRF
	bitrate: 0
	buffer size: 0
	crf: 21
	fps_num: 30
	fps_den: 1
	width: 1280
	height: 720
	keyint: 250
info: ---------------------------------
info: [FFmpeg aac encoder: 'simple_aac_recording0'] bitrate: 192, channels: 2, channel_layout: stereo, track: 1
info: ==== Recording Start ===============================================
info: [mp4 output: 'simple_file_output'] Writing Hybrid MP4/MOV file '/home/christopher/2025-11-25 08-25-02.mp4'...
info: [mp4 muxer: 'simple_file_output'] Flushing final fragment...
info: [mp4 muxer: 'simple_file_output'] Number of fragments: 1
info: [mp4 muxer: 'simple_file_output'] Full moov size: 5 KiB
info: [mp4 muxer: 'simple_file_output'] Final mdat size: 15 KiB
info: Output 'simple_file_output': stopping
info: Output 'simple_file_output': Total frames output: 210
info: Output 'simple_file_output': Total drawn frames: 231
info: [mp4 output: 'simple_file_output'] Waiting for file writer to finish...
info: [mp4 output: 'simple_file_output'] File output complete. Finalization took 3 ms.
info: ==== Recording Stop ================================================
[aac @ 0x54d8d80] Qavg: 65536.000
[aac @ 0x54d8d80] 2 frames left in the queue on closing
info: ==== Shutting down ==================================================
info: pulse-input: Stopped recording from 'alsa_output.pci-0000_00_1b.0.analog-stereo.monitor'
info: pulse-input: Got 3946 packets with 881357 frames
info: All scene data cleared
info: ------------------------------------------------
info: [Scripting] Total detached callbacks: 0
info: Freeing OBS context data
info: == Profiler Results =============================
info: run_program_init: 5339.31 ms
info: ┣OBSApp::AppInit: 24.007 ms
info: ┃ ┗OBSApp::InitLocale: 1.035 ms
info: ┗OBSApp::OBSInit: 449.266 ms
info: ┣obs_startup: 5.708 ms
info: ┗OBSBasic::OBSInit: 378.592 ms
info: ┣OBSBasic::InitBasicConfig: 4.102 ms
info: ┣OBSBasic::ResetAudio: 0.443 ms
info: ┣OBSBasic::ResetVideo: 89.224 ms
info: ┃ ┗obs_init_graphics: 82.353 ms
info: ┃ ┗shader compilation: 41.139 ms
info: ┣OBSBasic::InitOBSCallbacks: 0.009 ms
info: ┣OBSBasic::InitHotkeys: 0.034 ms
info: ┣obs_load_all_modules2: 157.781 ms
info: ┃ ┣obs_init_module(decklink-captions.so): 0 ms
info: ┃ ┣obs_init_module(decklink-output-ui.so): 0 ms
info: ┃ ┣obs_init_module(decklink.so): 0.115 ms
info: ┃ ┣obs_init_module(frontend-tools.so): 82.262 ms
info: ┃ ┣obs_init_module(image-source.so): 0.006 ms
info: ┃ ┣obs_init_module(libwlrobs.so): 0.002 ms
info: ┃ ┣obs_init_module(linux-alsa.so): 0.001 ms
info: ┃ ┣obs_init_module(linux-capture.so): 0 ms
info: ┃ ┣obs_init_module(linux-pipewire.so): 15.467 ms
info: ┃ ┣obs_init_module(linux-pulseaudio.so): 0.002 ms
info: ┃ ┣obs_init_module(linux-v4l2.so): 2.503 ms
info: ┃ ┣obs_init_module(obs-ffmpeg.so): 2.594 ms
info: ┃ ┣obs_init_module(obs-filters.so): 0.024 ms
info: ┃ ┣obs_init_module(obs-outputs.so): 0.004 ms
info: ┃ ┣obs_init_module(obs-transitions.so): 0.006 ms
info: ┃ ┣obs_init_module(obs-vst.so): 0.002 ms
info: ┃ ┣obs_init_module(obs-webrtc.so): 0.009 ms
info: ┃ ┣obs_init_module(obs-x264.so): 0.001 ms
info: ┃ ┣obs_init_module(rtmp-services.so): 0.478 ms
info: ┃ ┣obs_init_module(text-freetype2.so): 0.009 ms
info: ┃ ┗obs_init_module(vlc-video.so): 2.394 ms
info: ┣OBSBasic::InitService: 1.653 ms
info: ┣OBSBasic::ResetOutputs: 0.264 ms
info: ┣OBSBasic::CreateHotkeys: 0.042 ms
info: ┣OBSBasic::InitPrimitives: 0.245 ms
info: ┗OBSBasic::Load: 59.951 ms
info: obs_hotkey_thread(25 ms): min=0 ms, median=0.001 ms, max=0.003 ms, 99th percentile=0.002 ms, 100% below 25 ms
info: audio_thread(Audio): min=0.011 ms, median=0.098 ms, max=3.984 ms, 99th percentile=0.978 ms
info: ┗receive_audio: min=0.01 ms, median=0.425 ms, max=3.828 ms, 99th percentile=0.577 ms, 0.344106 calls per parent call
info: ┣buffer_audio: min=0.002 ms, median=0.003 ms, max=0.052 ms, 99th percentile=0.012 ms
info: ┗do_encode: min=0.046 ms, median=0.417 ms, max=3.81 ms, 99th percentile=0.554 ms
info: ┣encode(simple_aac_recording0): min=0.041 ms, median=0.405 ms, max=0.81 ms, 99th percentile=0.538 ms
info: ┗send_packet: min=0.002 ms, median=0.009 ms, max=2.994 ms, 99th percentile=0.031 ms
info: obs_graphics_thread(33.3333 ms): min=0.042 ms, median=0.739 ms, max=17.858 ms, 99th percentile=2.993 ms, 100% below 33.333 ms
info: ┣tick_sources: min=0.001 ms, median=0.018 ms, max=0.058 ms, 99th percentile=0.022 ms
info: ┣output_frame: min=0.023 ms, median=0.268 ms, max=5.165 ms, 99th percentile=1.37 ms
info: ┃ ┣gs_context(video->graphics): min=0.023 ms, median=0.267 ms, max=5.164 ms, 99th percentile=0.722 ms
info: ┃ ┃ ┣render_video: min=0.017 ms, median=0.068 ms, max=4.196 ms, 99th percentile=0.297 ms
info: ┃ ┃ ┃ ┣render_main_texture: min=0.013 ms, median=0.057 ms, max=0.113 ms, 99th percentile=0.068 ms
info: ┃ ┃ ┃ ┣render_output_texture: min=0.065 ms, median=0.097 ms, max=2.035 ms, 99th percentile=0.115 ms, 0.344776 calls per parent call
info: ┃ ┃ ┃ ┣render_convert_texture: min=0.04 ms, median=0.065 ms, max=1.596 ms, 99th percentile=0.076 ms, 0.344776 calls per parent call
info: ┃ ┃ ┃ ┗stage_output_texture: min=0.026 ms, median=0.041 ms, max=0.521 ms, 99th percentile=0.057 ms, 0.344776 calls per parent call
info: ┃ ┃ ┣gs_flush: min=0.003 ms, median=0.17 ms, max=0.956 ms, 99th percentile=0.232 ms
info: ┃ ┃ ┗download_frame: min=0 ms, median=0.187 ms, max=0.297 ms, 99th percentile=0.217 ms, 0.344776 calls per parent call
info: ┃ ┗output_video_data: min=0.277 ms, median=0.376 ms, max=2.077 ms, 99th percentile=1.993 ms, 0.343284 calls per parent call
info: ┗render_displays: min=0.001 ms, median=0.397 ms, max=9.747 ms, 99th percentile=0.584 ms
info: video_thread(video): min=1.364 ms, median=2.042 ms, max=8.138 ms, 99th percentile=5.792 ms
info: ┗receive_video: min=1.363 ms, median=2.038 ms, max=8.133 ms, 99th percentile=5.786 ms
info: ┗do_encode: min=1.361 ms, median=2.036 ms, max=8.131 ms, 99th percentile=5.781 ms
info: ┣encode(simple_video_recording): min=1.345 ms, median=2.007 ms, max=6.339 ms, 99th percentile=5.746 ms
info: ┗send_packet: min=0.004 ms, median=0.016 ms, max=4.006 ms, 99th percentile=0.061 ms, 0.917391 calls per parent call
info: =================================================
info: == Profiler Time Between Calls ==================
info: obs_hotkey_thread(25 ms): min=25.065 ms, median=25.12 ms, max=27.315 ms, 98.9933% within ±2% of 25 ms (0% lower, 1.00671% higher)
info: obs_graphics_thread(33.3333 ms): min=32.111 ms, median=33.334 ms, max=34.515 ms, 99.701% within ±2% of 33.333 ms (0.149477% lower, 0.149477% higher)
info: =================================================
info: Number of memory leaks: 0
christopher@theoden ~$ christopher@theoden ~$ obs
debug: Found dbus service: org.freedesktop.ScreenSaver
debug: Attempted path: /gnu/store/m81cmbp0x7417j82hsrjxj8z24r3r222-obs-32.0.1/bin/../share/obs/obs-studio/locale/en-US.ini
debug: Attempted path: /gnu/store/m81cmbp0x7417j82hsrjxj8z24r3r222-obs-32.0.1/bin/../share/obs/obs-studio/locale.ini
debug: Attempted path: /gnu/store/m81cmbp0x7417j82hsrjxj8z24r3r222-obs-32.0.1/bin/../share/obs/obs-studio/themes
debug: Attempted path: /gnu/store/m81cmbp0x7417j82hsrjxj8z24r3r222-obs-32.0.1/bin/../share/obs/obs-studio/themes/
info: Platform: Wayland
info: CPU Name: Intel(R) Core(TM) i5-4570 CPU @ 3.20GHz
info: CPU Speed: 1496.657MHz
info: Physical Cores: 4, Logical Cores: 4
info: Physical Memory: 15906MB Total, 13955MB Free
info: Kernel Version: Linux 6.17.8-gnu
info: Distribution: "Guix System" Unknown
info: Desktop Environment: GNOME (gnome)
info: Session Type: wayland
info: Current Date/Time: 2025年11月25日, 08:24:04 AM
info: Browser Hardware Acceleration: true
info: Qt Version: 6.9.2 (runtime), 6.9.2 (compiled)
info: Portable mode: false
info: OBS 32.0.1 (linux)
info: ---------------------------------
info: ---------------------------------
info: audio settings reset:
 samples per sec: 48000
 speakers: 2
 max buffering: 960 milliseconds
 buffering type: dynamically increasing
info: ---------------------------------
info: Initializing OpenGL...
info: Using EGL/Wayland
info: Initialized EGL 1.5
info: Loading up OpenGL on adapter Intel Mesa Intel(R) HD Graphics 4600 (HSW GT2)
info: OpenGL loaded successfully, version 4.6 (Core Profile) Mesa 25.2.3, shading language 4.60
info: ---------------------------------

I did a reconfigure using wayland. The GNOME screenshot recording tool is still giving me the error "Screencast failed to start". Here is the console output from obs. The behavior is still the same as before, where adding a Wayland recording source causes a segfault. If I restart, I am able to proceed to making the recording, but there is nothing being recorded, only a blank black screen. ``` christopher@theoden ~$ obs debug: Found dbus service: org.freedesktop.ScreenSaver debug: Attempted path: /gnu/store/m81cmbp0x7417j82hsrjxj8z24r3r222-obs-32.0.1/bin/../share/obs/obs-studio/locale/en-US.ini debug: Attempted path: /gnu/store/m81cmbp0x7417j82hsrjxj8z24r3r222-obs-32.0.1/bin/../share/obs/obs-studio/locale.ini debug: Attempted path: /gnu/store/m81cmbp0x7417j82hsrjxj8z24r3r222-obs-32.0.1/bin/../share/obs/obs-studio/themes debug: Attempted path: /gnu/store/m81cmbp0x7417j82hsrjxj8z24r3r222-obs-32.0.1/bin/../share/obs/obs-studio/themes/ info: Platform: Wayland info: CPU Name: Intel(R) Core(TM) i5-4570 CPU @ 3.20GHz info: CPU Speed: 1496.657MHz info: Physical Cores: 4, Logical Cores: 4 info: Physical Memory: 15906MB Total, 13955MB Free info: Kernel Version: Linux 6.17.8-gnu info: Distribution: "Guix System" Unknown info: Desktop Environment: GNOME (gnome) info: Session Type: wayland info: Current Date/Time: 2025年11月25日, 08:24:04 AM info: Browser Hardware Acceleration: true info: Qt Version: 6.9.2 (runtime), 6.9.2 (compiled) info: Portable mode: false info: OBS 32.0.1 (linux) info: --------------------------------- info: --------------------------------- info: audio settings reset: samples per sec: 48000 speakers: 2 max buffering: 960 milliseconds buffering type: dynamically increasing info: --------------------------------- info: Initializing OpenGL... info: Using EGL/Wayland info: Initialized EGL 1.5 info: Loading up OpenGL on adapter Intel Mesa Intel(R) HD Graphics 4600 (HSW GT2) info: OpenGL loaded successfully, version 4.6 (Core Profile) Mesa 25.2.3, shading language 4.60 info: --------------------------------- info: video settings reset: base resolution: 1920x1080 output resolution: 1280x720 downscale filter: Bicubic fps: 30/1 format: NV12 YUV mode: Rec. 709/Partial info: NV12 texture support enabled info: P010 texture support not available info: Audio monitoring device: name: Default id: default info: --------------------------------- warning: Failed to load 'en-US' text for module: 'decklink-captions.so' warning: Failed to load 'en-US' text for module: 'decklink-output-ui.so' libDeckLinkAPI.so: cannot open shared object file: No such file or directory warning: A DeckLink iterator could not be created. The DeckLink drivers may not be installed warning: Failed to initialize module 'decklink.so' info: [pipewire] Available capture sources: info: [pipewire] - Monitor source info: [pipewire] - Window source warning: v4l2loopback not installed, virtual camera not registered info: VAAPI: API version 1.22 info: FFmpeg VAAPI H264 encoding supported info: FFmpeg VAAPI AV1 encoding not supported info: FFmpeg VAAPI HEVC encoding not supported info: [vlc-video]: VLC 3.0.21 Vetinari found, VLC video source enabled info: --------------------------------- info: Loaded Modules: info: vlc-video.so info: text-freetype2.so info: rtmp-services.so info: obs-x264.so info: obs-webrtc.so info: obs-vst.so info: obs-transitions.so info: obs-outputs.so info: obs-filters.so info: obs-ffmpeg.so info: linux-v4l2.so info: linux-pulseaudio.so info: linux-pipewire.so info: linux-capture.so info: linux-alsa.so info: libwlrobs.so info: image-source.so info: frontend-tools.so info: decklink-output-ui.so info: decklink-captions.so info: --------------------------------- info: --------------------------------- info: Available Encoders: info: Video Encoders: info: - ffmpeg_svt_av1 (SVT-AV1) info: - ffmpeg_aom_av1 (AOM AV1) info: - ffmpeg_vaapi_tex (FFmpeg VAAPI H.264) info: - obs_x264 (x264) info: Audio Encoders: info: - ffmpeg_aac (FFmpeg AAC) info: - ffmpeg_opus (FFmpeg Opus) info: - ffmpeg_pcm_s16le (FFmpeg PCM (16-bit)) info: - ffmpeg_pcm_s24le (FFmpeg PCM (24-bit)) info: - ffmpeg_pcm_f32le (FFmpeg PCM (32-bit float)) info: - ffmpeg_alac (FFmpeg ALAC (24-bit)) info: - ffmpeg_flac (FFmpeg FLAC (16-bit)) info: ==== Startup complete =============================================== info: All scene data cleared info: ------------------------------------------------ info: pulse-input: Server name: 'pulseaudio 16.1' info: pulse-input: Audio format: s16le, 44100 Hz, 2 channels info: pulse-input: Started recording from 'alsa_output.pci-0000_00_1b.0.analog-stereo.monitor' (default) info: [Loaded global audio device]: 'Desktop Audio' info: Switched to scene 'Scene' info: ------------------------------------------------ info: Loaded scenes: info: - scene 'Scene': info: - source: 'Wayland output(scpy)' (wlrobs-scpy) info: ------------------------------------------------ info: Device for 'Audio Output Capture' source is also used for audio monitoring: Deduplication logic is being applied to all monitored sources. info: --------------------------------- info: [x264 encoder: 'simple_video_recording'] preset: veryfast info: [x264 encoder: 'simple_video_recording'] profile: high info: [x264 encoder: 'simple_video_recording'] settings: rate_control: CRF bitrate: 0 buffer size: 0 crf: 21 fps_num: 30 fps_den: 1 width: 1280 height: 720 keyint: 250 info: --------------------------------- info: [FFmpeg aac encoder: 'simple_aac_recording0'] bitrate: 192, channels: 2, channel_layout: stereo, track: 1 info: ==== Recording Start =============================================== info: [mp4 output: 'simple_file_output'] Writing Hybrid MP4/MOV file '/home/christopher/2025-11-25 08-24-21.mp4'... info: [mp4 muxer: 'simple_file_output'] Flushing final fragment... info: [mp4 muxer: 'simple_file_output'] Number of fragments: 2 info: [mp4 muxer: 'simple_file_output'] Full moov size: 6 KiB info: [mp4 muxer: 'simple_file_output'] Final mdat size: 22 KiB info: Output 'simple_file_output': stopping info: Output 'simple_file_output': Total frames output: 308 info: Output 'simple_file_output': Total drawn frames: 328 (329 attempted) info: Output 'simple_file_output': Number of lagged frames due to rendering lag/stalls: 1 (0.3%) info: [mp4 output: 'simple_file_output'] Waiting for file writer to finish... info: ==== Recording Stop ================================================ info: [mp4 output: 'simple_file_output'] File output complete. Finalization took 5 ms. [aac @ 0xfa6bd80] Qavg: 65536.000 [aac @ 0xfa6bd80] 2 frames left in the queue on closing info: User Removed source 'Wayland output(scpy)' (wlrobs-scpy) from scene 'Scene' info: User added source 'Wayland output(dmabuf)' (wlrobs-dmabuf) to scene 'Scene' Segmentation fault christopher@theoden ~$ obs debug: Found dbus service: org.freedesktop.ScreenSaver debug: Attempted path: /gnu/store/m81cmbp0x7417j82hsrjxj8z24r3r222-obs-32.0.1/bin/../share/obs/obs-studio/locale/en-US.ini debug: Attempted path: /gnu/store/m81cmbp0x7417j82hsrjxj8z24r3r222-obs-32.0.1/bin/../share/obs/obs-studio/locale.ini debug: Attempted path: /gnu/store/m81cmbp0x7417j82hsrjxj8z24r3r222-obs-32.0.1/bin/../share/obs/obs-studio/themes debug: Attempted path: /gnu/store/m81cmbp0x7417j82hsrjxj8z24r3r222-obs-32.0.1/bin/../share/obs/obs-studio/themes/ warning: Crash or unclean shutdown detected warning: [Safe Mode] Normal launch selected, loading third-party plugins is enabled info: Platform: Wayland info: CPU Name: Intel(R) Core(TM) i5-4570 CPU @ 3.20GHz info: CPU Speed: 798.251MHz info: Physical Cores: 4, Logical Cores: 4 info: Physical Memory: 15906MB Total, 14045MB Free info: Kernel Version: Linux 6.17.8-gnu info: Distribution: "Guix System" Unknown info: Desktop Environment: GNOME (gnome) info: Session Type: wayland info: Current Date/Time: 2025年11月25日, 08:24:57 AM info: Browser Hardware Acceleration: true info: Qt Version: 6.9.2 (runtime), 6.9.2 (compiled) info: Portable mode: false info: OBS 32.0.1 (linux) info: --------------------------------- info: --------------------------------- info: audio settings reset: samples per sec: 48000 speakers: 2 max buffering: 960 milliseconds buffering type: dynamically increasing info: --------------------------------- info: Initializing OpenGL... info: Using EGL/Wayland info: Initialized EGL 1.5 info: Loading up OpenGL on adapter Intel Mesa Intel(R) HD Graphics 4600 (HSW GT2) info: OpenGL loaded successfully, version 4.6 (Core Profile) Mesa 25.2.3, shading language 4.60 info: --------------------------------- info: video settings reset: base resolution: 1920x1080 output resolution: 1280x720 downscale filter: Bicubic fps: 30/1 format: NV12 YUV mode: Rec. 709/Partial info: NV12 texture support enabled info: P010 texture support not available info: Audio monitoring device: name: Default id: default info: --------------------------------- warning: Failed to load 'en-US' text for module: 'decklink-captions.so' warning: Failed to load 'en-US' text for module: 'decklink-output-ui.so' libDeckLinkAPI.so: cannot open shared object file: No such file or directory warning: A DeckLink iterator could not be created. The DeckLink drivers may not be installed warning: Failed to initialize module 'decklink.so' info: [pipewire] Available capture sources: info: [pipewire] - Monitor source info: [pipewire] - Window source warning: v4l2loopback not installed, virtual camera not registered info: VAAPI: API version 1.22 info: FFmpeg VAAPI H264 encoding supported info: FFmpeg VAAPI AV1 encoding not supported info: FFmpeg VAAPI HEVC encoding not supported info: [vlc-video]: VLC 3.0.21 Vetinari found, VLC video source enabled info: --------------------------------- info: Loaded Modules: info: vlc-video.so info: text-freetype2.so info: rtmp-services.so info: obs-x264.so info: obs-webrtc.so info: obs-vst.so info: obs-transitions.so info: obs-outputs.so info: obs-filters.so info: obs-ffmpeg.so info: linux-v4l2.so info: linux-pulseaudio.so info: linux-pipewire.so info: linux-capture.so info: linux-alsa.so info: libwlrobs.so info: image-source.so info: frontend-tools.so info: decklink-output-ui.so info: decklink-captions.so info: --------------------------------- info: --------------------------------- info: Available Encoders: info: Video Encoders: info: - ffmpeg_svt_av1 (SVT-AV1) info: - ffmpeg_aom_av1 (AOM AV1) info: - ffmpeg_vaapi_tex (FFmpeg VAAPI H.264) info: - obs_x264 (x264) info: Audio Encoders: info: - ffmpeg_aac (FFmpeg AAC) info: - ffmpeg_opus (FFmpeg Opus) info: - ffmpeg_pcm_s16le (FFmpeg PCM (16-bit)) info: - ffmpeg_pcm_s24le (FFmpeg PCM (24-bit)) info: - ffmpeg_pcm_f32le (FFmpeg PCM (32-bit float)) info: - ffmpeg_alac (FFmpeg ALAC (24-bit)) info: - ffmpeg_flac (FFmpeg FLAC (16-bit)) info: ==== Startup complete =============================================== info: All scene data cleared info: ------------------------------------------------ info: pulse-input: Server name: 'pulseaudio 16.1' info: pulse-input: Audio format: s16le, 44100 Hz, 2 channels info: pulse-input: Started recording from 'alsa_output.pci-0000_00_1b.0.analog-stereo.monitor' (default) info: [Loaded global audio device]: 'Desktop Audio' info: Switched to scene 'Scene' info: ------------------------------------------------ info: Loaded scenes: info: - scene 'Scene': info: - source: 'Wayland output(dmabuf)' (wlrobs-dmabuf) info: ------------------------------------------------ info: Device for 'Audio Output Capture' source is also used for audio monitoring: Deduplication logic is being applied to all monitored sources. info: adding 21 milliseconds of audio buffering, total audio buffering is now 21 milliseconds (source: Desktop Audio) info: --------------------------------- info: [x264 encoder: 'simple_video_recording'] preset: veryfast info: [x264 encoder: 'simple_video_recording'] profile: high info: [x264 encoder: 'simple_video_recording'] settings: rate_control: CRF bitrate: 0 buffer size: 0 crf: 21 fps_num: 30 fps_den: 1 width: 1280 height: 720 keyint: 250 info: --------------------------------- info: [FFmpeg aac encoder: 'simple_aac_recording0'] bitrate: 192, channels: 2, channel_layout: stereo, track: 1 info: ==== Recording Start =============================================== info: [mp4 output: 'simple_file_output'] Writing Hybrid MP4/MOV file '/home/christopher/2025-11-25 08-25-02.mp4'... info: [mp4 muxer: 'simple_file_output'] Flushing final fragment... info: [mp4 muxer: 'simple_file_output'] Number of fragments: 1 info: [mp4 muxer: 'simple_file_output'] Full moov size: 5 KiB info: [mp4 muxer: 'simple_file_output'] Final mdat size: 15 KiB info: Output 'simple_file_output': stopping info: Output 'simple_file_output': Total frames output: 210 info: Output 'simple_file_output': Total drawn frames: 231 info: [mp4 output: 'simple_file_output'] Waiting for file writer to finish... info: [mp4 output: 'simple_file_output'] File output complete. Finalization took 3 ms. info: ==== Recording Stop ================================================ [aac @ 0x54d8d80] Qavg: 65536.000 [aac @ 0x54d8d80] 2 frames left in the queue on closing info: ==== Shutting down ================================================== info: pulse-input: Stopped recording from 'alsa_output.pci-0000_00_1b.0.analog-stereo.monitor' info: pulse-input: Got 3946 packets with 881357 frames info: All scene data cleared info: ------------------------------------------------ info: [Scripting] Total detached callbacks: 0 info: Freeing OBS context data info: == Profiler Results ============================= info: run_program_init: 5339.31 ms info: ┣OBSApp::AppInit: 24.007 ms info: ┃ ┗OBSApp::InitLocale: 1.035 ms info: ┗OBSApp::OBSInit: 449.266 ms info: ┣obs_startup: 5.708 ms info: ┗OBSBasic::OBSInit: 378.592 ms info: ┣OBSBasic::InitBasicConfig: 4.102 ms info: ┣OBSBasic::ResetAudio: 0.443 ms info: ┣OBSBasic::ResetVideo: 89.224 ms info: ┃ ┗obs_init_graphics: 82.353 ms info: ┃ ┗shader compilation: 41.139 ms info: ┣OBSBasic::InitOBSCallbacks: 0.009 ms info: ┣OBSBasic::InitHotkeys: 0.034 ms info: ┣obs_load_all_modules2: 157.781 ms info: ┃ ┣obs_init_module(decklink-captions.so): 0 ms info: ┃ ┣obs_init_module(decklink-output-ui.so): 0 ms info: ┃ ┣obs_init_module(decklink.so): 0.115 ms info: ┃ ┣obs_init_module(frontend-tools.so): 82.262 ms info: ┃ ┣obs_init_module(image-source.so): 0.006 ms info: ┃ ┣obs_init_module(libwlrobs.so): 0.002 ms info: ┃ ┣obs_init_module(linux-alsa.so): 0.001 ms info: ┃ ┣obs_init_module(linux-capture.so): 0 ms info: ┃ ┣obs_init_module(linux-pipewire.so): 15.467 ms info: ┃ ┣obs_init_module(linux-pulseaudio.so): 0.002 ms info: ┃ ┣obs_init_module(linux-v4l2.so): 2.503 ms info: ┃ ┣obs_init_module(obs-ffmpeg.so): 2.594 ms info: ┃ ┣obs_init_module(obs-filters.so): 0.024 ms info: ┃ ┣obs_init_module(obs-outputs.so): 0.004 ms info: ┃ ┣obs_init_module(obs-transitions.so): 0.006 ms info: ┃ ┣obs_init_module(obs-vst.so): 0.002 ms info: ┃ ┣obs_init_module(obs-webrtc.so): 0.009 ms info: ┃ ┣obs_init_module(obs-x264.so): 0.001 ms info: ┃ ┣obs_init_module(rtmp-services.so): 0.478 ms info: ┃ ┣obs_init_module(text-freetype2.so): 0.009 ms info: ┃ ┗obs_init_module(vlc-video.so): 2.394 ms info: ┣OBSBasic::InitService: 1.653 ms info: ┣OBSBasic::ResetOutputs: 0.264 ms info: ┣OBSBasic::CreateHotkeys: 0.042 ms info: ┣OBSBasic::InitPrimitives: 0.245 ms info: ┗OBSBasic::Load: 59.951 ms info: obs_hotkey_thread(25 ms): min=0 ms, median=0.001 ms, max=0.003 ms, 99th percentile=0.002 ms, 100% below 25 ms info: audio_thread(Audio): min=0.011 ms, median=0.098 ms, max=3.984 ms, 99th percentile=0.978 ms info: ┗receive_audio: min=0.01 ms, median=0.425 ms, max=3.828 ms, 99th percentile=0.577 ms, 0.344106 calls per parent call info: ┣buffer_audio: min=0.002 ms, median=0.003 ms, max=0.052 ms, 99th percentile=0.012 ms info: ┗do_encode: min=0.046 ms, median=0.417 ms, max=3.81 ms, 99th percentile=0.554 ms info: ┣encode(simple_aac_recording0): min=0.041 ms, median=0.405 ms, max=0.81 ms, 99th percentile=0.538 ms info: ┗send_packet: min=0.002 ms, median=0.009 ms, max=2.994 ms, 99th percentile=0.031 ms info: obs_graphics_thread(33.3333 ms): min=0.042 ms, median=0.739 ms, max=17.858 ms, 99th percentile=2.993 ms, 100% below 33.333 ms info: ┣tick_sources: min=0.001 ms, median=0.018 ms, max=0.058 ms, 99th percentile=0.022 ms info: ┣output_frame: min=0.023 ms, median=0.268 ms, max=5.165 ms, 99th percentile=1.37 ms info: ┃ ┣gs_context(video->graphics): min=0.023 ms, median=0.267 ms, max=5.164 ms, 99th percentile=0.722 ms info: ┃ ┃ ┣render_video: min=0.017 ms, median=0.068 ms, max=4.196 ms, 99th percentile=0.297 ms info: ┃ ┃ ┃ ┣render_main_texture: min=0.013 ms, median=0.057 ms, max=0.113 ms, 99th percentile=0.068 ms info: ┃ ┃ ┃ ┣render_output_texture: min=0.065 ms, median=0.097 ms, max=2.035 ms, 99th percentile=0.115 ms, 0.344776 calls per parent call info: ┃ ┃ ┃ ┣render_convert_texture: min=0.04 ms, median=0.065 ms, max=1.596 ms, 99th percentile=0.076 ms, 0.344776 calls per parent call info: ┃ ┃ ┃ ┗stage_output_texture: min=0.026 ms, median=0.041 ms, max=0.521 ms, 99th percentile=0.057 ms, 0.344776 calls per parent call info: ┃ ┃ ┣gs_flush: min=0.003 ms, median=0.17 ms, max=0.956 ms, 99th percentile=0.232 ms info: ┃ ┃ ┗download_frame: min=0 ms, median=0.187 ms, max=0.297 ms, 99th percentile=0.217 ms, 0.344776 calls per parent call info: ┃ ┗output_video_data: min=0.277 ms, median=0.376 ms, max=2.077 ms, 99th percentile=1.993 ms, 0.343284 calls per parent call info: ┗render_displays: min=0.001 ms, median=0.397 ms, max=9.747 ms, 99th percentile=0.584 ms info: video_thread(video): min=1.364 ms, median=2.042 ms, max=8.138 ms, 99th percentile=5.792 ms info: ┗receive_video: min=1.363 ms, median=2.038 ms, max=8.133 ms, 99th percentile=5.786 ms info: ┗do_encode: min=1.361 ms, median=2.036 ms, max=8.131 ms, 99th percentile=5.781 ms info: ┣encode(simple_video_recording): min=1.345 ms, median=2.007 ms, max=6.339 ms, 99th percentile=5.746 ms info: ┗send_packet: min=0.004 ms, median=0.016 ms, max=4.006 ms, 99th percentile=0.061 ms, 0.917391 calls per parent call info: ================================================= info: == Profiler Time Between Calls ================== info: obs_hotkey_thread(25 ms): min=25.065 ms, median=25.12 ms, max=27.315 ms, 98.9933% within ±2% of 25 ms (0% lower, 1.00671% higher) info: obs_graphics_thread(33.3333 ms): min=32.111 ms, median=33.334 ms, max=34.515 ms, 99.701% within ±2% of 33.333 ms (0.149477% lower, 0.149477% higher) info: ================================================= info: Number of memory leaks: 0 christopher@theoden ~$ christopher@theoden ~$ obs debug: Found dbus service: org.freedesktop.ScreenSaver debug: Attempted path: /gnu/store/m81cmbp0x7417j82hsrjxj8z24r3r222-obs-32.0.1/bin/../share/obs/obs-studio/locale/en-US.ini debug: Attempted path: /gnu/store/m81cmbp0x7417j82hsrjxj8z24r3r222-obs-32.0.1/bin/../share/obs/obs-studio/locale.ini debug: Attempted path: /gnu/store/m81cmbp0x7417j82hsrjxj8z24r3r222-obs-32.0.1/bin/../share/obs/obs-studio/themes debug: Attempted path: /gnu/store/m81cmbp0x7417j82hsrjxj8z24r3r222-obs-32.0.1/bin/../share/obs/obs-studio/themes/ info: Platform: Wayland info: CPU Name: Intel(R) Core(TM) i5-4570 CPU @ 3.20GHz info: CPU Speed: 1496.657MHz info: Physical Cores: 4, Logical Cores: 4 info: Physical Memory: 15906MB Total, 13955MB Free info: Kernel Version: Linux 6.17.8-gnu info: Distribution: "Guix System" Unknown info: Desktop Environment: GNOME (gnome) info: Session Type: wayland info: Current Date/Time: 2025年11月25日, 08:24:04 AM info: Browser Hardware Acceleration: true info: Qt Version: 6.9.2 (runtime), 6.9.2 (compiled) info: Portable mode: false info: OBS 32.0.1 (linux) info: --------------------------------- info: --------------------------------- info: audio settings reset: samples per sec: 48000 speakers: 2 max buffering: 960 milliseconds buffering type: dynamically increasing info: --------------------------------- info: Initializing OpenGL... info: Using EGL/Wayland info: Initialized EGL 1.5 info: Loading up OpenGL on adapter Intel Mesa Intel(R) HD Graphics 4600 (HSW GT2) info: OpenGL loaded successfully, version 4.6 (Core Profile) Mesa 25.2.3, shading language 4.60 info: --------------------------------- ```

kestrelwx commented 2025年11月27日 15:10:09 +01:00

I've got screenrecording to work with the default screenshot utility in guix system vm with just these changes:

--- config.orig.scm	2025年11月27日 17:04:52.267851682 +0300
+++ config.scm	2025年11月27日 16:15:28.647466102 +0300
@@ -6,8 +6,12 @@
 	 (gnu packages gnome)
 ;; (gnu packages lxqt)
 	 (gnu packages scanner))
+(use-modules (gnu home)
+ (gnu home services)
+ (gnu home services sound)
+ (gnu home services desktop))
 
-(use-service-modules desktop databases networking ssh xorg cups)
+(use-service-modules desktop databases networking ssh xorg cups guix)
 
 (operating-system
 (locale "en_US.utf8")
@@ -97,6 +101,12 @@
 (set-xorg-configuration
 (xorg-configuration
 (keyboard-layout keyboard-layout)))
+ (service guix-home-service-type
+ `(("christopher"
+ ,(home-environment
+ (services
+ (list (service home-pipewire-service-type)
+ (service home-dbus-service-type)))))))
 (service cups-service-type
 	 (cups-configuration
 	 (web-interface? #t)
@@ -146,7 +156,7 @@
 (gdm-service-type
 config =>
 (gdm-configuration
- (wayland? #f)))
+ (wayland? #t)))
 #;(guix-service-type
 config =>
 (guix-configuration

Do you have DBus and Pipewire services in your Guix Home configuration? (No need to have guix-home-service-type)
I haven't tried OBS, but I'm assuming it'll work also. There will be a source titled Screen recording (Pipewire), I believe. You don't need the wlrobs extension, also.

I've got screenrecording to work with the default screenshot utility in `guix system vm` with just these changes: ``` diff --- config.orig.scm 2025年11月27日 17:04:52.267851682 +0300 +++ config.scm 2025年11月27日 16:15:28.647466102 +0300 @@ -6,8 +6,12 @@ (gnu packages gnome) ;; (gnu packages lxqt) (gnu packages scanner)) +(use-modules (gnu home) + (gnu home services) + (gnu home services sound) + (gnu home services desktop)) -(use-service-modules desktop databases networking ssh xorg cups) +(use-service-modules desktop databases networking ssh xorg cups guix) (operating-system (locale "en_US.utf8") @@ -97,6 +101,12 @@ (set-xorg-configuration (xorg-configuration (keyboard-layout keyboard-layout))) + (service guix-home-service-type + `(("christopher" + ,(home-environment + (services + (list (service home-pipewire-service-type) + (service home-dbus-service-type))))))) (service cups-service-type (cups-configuration (web-interface? #t) @@ -146,7 +156,7 @@ (gdm-service-type config => (gdm-configuration - (wayland? #f))) + (wayland? #t))) #;(guix-service-type config => (guix-configuration ``` Do you have DBus and Pipewire services in your Guix Home configuration? (No need to have `guix-home-service-type`) I haven't tried OBS, but I'm assuming it'll work also. There will be a source titled `Screen recording (Pipewire)`, I believe. You don't need the `wlrobs` extension, also.

infrared commented 2025年11月28日 23:37:39 +01:00

I added those pipewire and dbus services to my home config file and did a home reconfig, and now GNOME screen recording and OBS both work for me. Thank you!

In my uninformed opinion, merely as a user, it seems like these services should some how be automatically added when GNOME with Wayland is selected in the system config. But maybe that violates some boundary between the guix system and guix home configuration models...?

I added those pipewire and dbus services to my home config file and did a home reconfig, and now GNOME screen recording and OBS both work for me. Thank you! In my uninformed opinion, merely as a user, it seems like these services should some how be automatically added when GNOME with Wayland is selected in the system config. But maybe that violates some boundary between the guix system and guix home configuration models...?

Adroit commented 2026年02月28日 07:46:55 +01:00

I share that opinion, many years ago I switched to using guix home way before I was ready (conflicts abound) just because I wanted to use Pipewire. Unlike Pulseaudio, Pipewire runs as a per-user service, which Guix only supports in Guix home.

I thought it would be integrated by now (2026). Being able to install by default a wayland gnome desktop without pipewire doesn't make much sense...

I share that opinion, many years ago I switched to using `guix home` way before I was ready (conflicts abound) just because I wanted to use Pipewire. Unlike Pulseaudio, Pipewire runs as a per-user service, which Guix only supports in Guix home. I thought it would be integrated by now (2026). Being able to install by default a wayland gnome desktop without pipewire doesn't make much sense...