Et pour finir ...

... ca marche, et je ne sais pas pourquoi (ce qui est fort frustrant ma foi).

En reverifiant mes connexions d'enceintes, j'ai accidentellement debranché mon cable d'alim ... une fois la machine redemarrée, ca fonctionne :'(

Donc histoire de donner un peu de contenu à ce "monologuopost", voici les contrôles qui servent à activer le son dans alsamixer pour cette carte :
(contrairement à ce que j'ai pu lire)

<IEC958 0> doit être en mute
<Audigy A> doit être actif

Bon, ca c'est fait ;)

Ensuite, au cas où quelqu'un pourrait en tirer quelque chose :

ls -l /etc/modprobe.conf
-rw-r--r-- 1 root root 5898 Jul 6 2006 /etc/modprobe.conf

/etc/modprobe.conf

--------------------------------------------------------------------------------------------
### This file is automatically generated by modules-update
#
# Please do not edit this file directly. If you want to change or add
# anything please take a look at /etc/modules.conf and read
# the manpage for modules-update.
#
alias binfmt-204 binfmt_aout
alias binfmt-263 binfmt_aout
alias binfmt-264 binfmt_aout
alias binfmt-267 binfmt_aout
alias binfmt-387 binfmt_aout
alias binfmt-332 iBCS
alias binfmt--310 binfmt_java
alias block-major-1-* rd
alias block-major-2-* floppy
alias block-major-3-* ide-probe-mod
alias block-major-7-* loop
alias block-major-8-* sd_mod
alias block-major-9-* md
alias block-major-11-* sr_mod
alias block-major-13-* xd
alias block-major-15-* cdu31a
alias block-major-16-* gscd
alias block-major-17-* optcd
alias block-major-18-* sjcd
alias block-major-20-* mcdx
alias block-major-22-* ide-probe-mod
alias block-major-23-* mcd
alias block-major-24-* sonycd535
alias block-major-25-* sbpcd
alias block-major-26-* sbpcd
alias block-major-27-* sbpcd
alias block-major-29-* aztcd
alias block-major-32-* cm206
alias block-major-33-* ide-probe-mod
alias block-major-34-* ide-probe-mod
alias block-major-37-* ide-tape
alias block-major-44-* ftl
alias block-major-46-* pcd
alias block-major-47-* pf
alias block-major-56-* ide-probe-mod
alias block-major-57-* ide-probe-mod
alias block-major-58-* lvm-mod
alias block-major-88-* ide-probe-mod
alias block-major-89-* ide-probe-mod
alias block-major-90-* ide-probe-mod
alias block-major-91-* ide-probe-mod
alias block-major-93-* nftl
alias block-major-113-* viocd
alias char-major-4-* serial
alias char-major-5-* serial
alias char-major-6-* lp
alias char-major-9-* st
alias char-major-10-0 busmouse
alias char-major-10-2 msbusmouse
alias char-major-10-3 atixlmouse
alias char-major-10-116 snd
alias char-major-10-130 wdt
alias char-major-10-131 wdt
alias char-major-10-135 rtc
alias char-major-10-139 openprom
alias char-major-10-144 nvram
alias char-major-10-157 applicom
alias char-major-10-175 agpgart
alias char-major-10-181 toshiba
alias char-major-10-183 hw_random
alias char-major-10-184 microcode
alias char-major-10-187 irnet
alias char-major-10-189 ussp
alias char-major-10-200 tun
alias char-major-10-250 hci_vhci
alias char-major-13-* input
alias char-major-13-0 joydev
alias char-major-13-32 mousedev
alias char-major-14-* soundcore
alias char-major-19-* cyclades
alias char-major-20-* cyclades
alias char-major-21-* sg
alias char-major-22-* pcxx
alias char-major-23-* pcxx
alias char-major-27-* zftape
alias char-major-34-* scc
alias char-major-35-* tclmidi
alias char-major-36-* netlink
alias char-major-37-* ide-tape
alias char-major-48-* riscom8
alias char-major-49-* riscom8
alias char-major-57-* esp
alias char-major-58-* esp
alias char-major-63-* kdebug
alias char-major-90-* mtdchar
alias char-major-96-* pt
alias char-major-97-* pg
alias char-major-99-* ppdev
alias char-major-107-* 3dfx
alias char-major-108-* ppp_generic
alias char-major-109-* lvm-mod
alias char-major-161-* ircomm-tty
alias char-major-171-* raw1394
alias char-major-195-* nvidia
alias char-major-200-* vxspec
alias char-major-206-* osst
alias char-major-216-* rfcomm
alias dos msdos
alias dummy0 dummy
alias dummy1 dummy
alias iso9660 isofs
alias md-personality-1 linear
alias md-personality-2 raid0
alias md-personality-3 raid1
alias md-personality-4 raid5
alias md-personality-7 multipath
alias net-pf-1 unix
alias net-pf-2 ipv4
alias net-pf-4 ipx
alias net-pf-5 appletalk
alias net-pf-15 af_key
alias net-pf-17 af_packet
alias net-pf-20 atm
alias net-pf-23 irda
alias net-pf-24 pppoe
alias net-pf-25 wanrouter
alias net-pf-26 llc
alias net-pf-31 bluez
alias netalias-2 ip_alias
alias irlan0 irlan
alias irda-dongle-0 tekram
alias irda-dongle-1 esi
alias irda-dongle-2 actisys
alias irda-dongle-3 actisys
alias irda-dongle-4 girbil
alias irda-dongle-5 litelink
alias irda-dongle-6 airport
alias irda-dongle-7 old_belkin
alias bt-proto-0 l2cap
alias bt-proto-2 sco
alias bt-proto-3 rfcomm
alias bt-proto-4 bnep
alias bt-proto-5 cmtp
alias bt-proto-6 hidp
alias bt-proto-7 avdtp
alias plip0 plip
alias plip1 plip
alias tunl0 ipip
alias cipcb0 cipcb
alias cipcb1 cipcb
alias cipcb2 cipcb
alias cipcb3 cipcb
alias ppp0 ppp_async
alias ppp1 ppp_async
alias slip0 slip
alias slip1 slip
alias tty-ldisc-1 slip
alias tty-ldisc-3 ppp_async
alias tty-ldisc-11 irtty
alias tty-ldisc-14 ppp_synctty
alias tty-ldisc-15 hci_uart
alias ppp-compress-18 ppp_mppe
alias ppp-compress-21 bsd_comp
alias ppp-compress-24 ppp_deflate
alias ppp-compress-26 ppp_deflate
alias ppp ppp_async
alias parport_lowlevel parport_pc
alias usbdevfs usbcore
alias xfrm-type-2-50 esp4
alias xfrm-type-2-51 ah4
alias xfrm-type-2-108 ipcomp
alias xfrm-type-10-50 esp6
alias xfrm-type-10-51 ah6
alias xfrm-type-10-108 ipcomp6
alias cipher_null crypto_null
alias digest_null crypto_null
alias compress_null crypto_null
alias sha384 sha512
alias char-major-81-* bttv
alias /dev/ppp ppp_generic
alias loop-xfer-gen-0 loop_gen
alias loop-xfer-3 loop_fish2
alias loop-xfer-gen-10 loop_gen
alias cipher-2 des
alias cipher-3 fish2
alias cipher-4 blowfish
alias cipher-6 idea
alias cipher-7 serp6f
alias cipher-8 mars6
alias cipher-11 rc62
alias cipher-15 dfc2
alias cipher-16 rijndael
alias cipher-17 rc5
alias char-major-89-* i2c-dev
alias /dev/nvidiactl nvidia
alias /dev/mixer snd-mixer-oss
alias /dev/dsp snd-pcm-oss
alias /dev/midi snd-seq-oss
alias snd-card-0 snd-emu10k1
alias sound-slot-0 snd-emu10k1
alias binfmt-0064 binfmt_aout
options sb io=0x220 irq=7 dma=1 dma16=5 mpu_io=0x330
install binfmt-0000 /bin/true
install char-major-10 /bin/true
install char-major-10-1 /bin/true
install dummy0 /sbin/modprobe -o dummy0 --ignore-install dummy
install dummy1 /sbin/modprobe -o dummy1 --ignore-install dummy
install eth0 /bin/true
install net-pf-10 /bin/true
install net-pf-19 /bin/true
install net-pf-3 /bin/true
install net-pf-6 /bin/true
install scsi_hostadapter /bin/true
--------------------------------------------------------------------------------------------

lsmod | grep snd
--------------------------------------------------------------------------------------------
[code]
snd_seq_midi 7040 0
snd_emu10k1_synth 6464 0
snd_emux_synth 29568 1 snd_emu10k1_synth
snd_seq_virmidi 5760 1 snd_emux_synth
snd_seq_midi_event 6464 2 snd_seq_midi,snd_seq_virmidi
snd_seq_midi_emul 5824 1 snd_emux_synth
snd_seq 46848 5 snd_seq_midi,snd_emux_synth,snd_seq_virmidi,snd_seq_midi_event,snd_seq_midi_emul
snd_emu10k1 109572 5 snd_emu10k1_synth
snd_rawmidi 19136 3 snd_seq_midi,snd_seq_virmidi,snd_emu10k1
snd_ac97_codec 98328 1 snd_emu10k1
snd_ac97_bus 2432 1 snd_ac97_codec
snd_pcm 76172 2 snd_emu10k1,snd_ac97_codec
snd_seq_device 7568 5 snd_seq_midi,snd_emu10k1_synth,snd_seq,snd_emu10k1,snd_rawmidi
snd_timer 19528 3 snd_seq,snd_emu10k1,snd_pcm
snd_page_alloc 8720 2 snd_emu10k1,snd_pcm
snd_util_mem 3904 2 snd_emux_synth,snd_emu10k1
snd_hwdep 7816 2 snd_emux_synth,snd_emu10k1
snd 45696 18 snd_emux_synth,snd_seq_virmidi,snd_seq,snd_emu10k1,snd_rawmidi,snd_ac97_codec,snd_pcm,snd_seq_device,snd_timer,snd_hwdep
--------------------------------------------------------------------------------------------