Problème sur un Dual Screen + drivers ATI

Bonjour,
Je viens de tester le binaire, mais si j'ai bien la musique, le jeu lui-même n'apparaît pas à l'écran, et je ne peux reprendre la main qu'en tuant le processus.
Dans un premier temps, j'obtiens en console :
[ceacy@ceacy-work ManiaDrive-0.95-linux-i386.static]$ ./mania_drive.static
Raydium: Using Raydium 0.700
Raydium: command line args: OK
Raydium: Requesting 1024x768:32 mode
Raydium: no Xinerama on this display


Après avoir tué le processus, voici le log entier :
[ceacy@ceacy-work ManiaDrive-0.95-linux-i386.static]$ ./mania_drive.static
Raydium: Using Raydium 0.700
Raydium: command line args: OK
Raydium: Requesting 1024x768:32 mode
Raydium: no Xinerama on this display
Raydium: Found 2560x1024 with 24 bits color buffer and 24 bits zbuffer
Raydium: using RADEON 9800 Generic, from ATI Technologies Inc. (version 1.3.5272 (X4.3.0-8.16.20))
Raydium: Signal Handlers: OK
Raydium: Platform "4xfloat" vector size is: 16 byte(s) long
Raydium: OpenGL implementation maximum texture size: 2048x2048
Raydium: OpenGL hardware providing 8 texture unit(s)
Raydium: vertex arrays memory: OK
Raydium: keyboard: OK
Raydium: mouse: OK
Raydium: /dev/input/event0: cannot open (rw), no Force Feedback.
Raydium: joy: FAILED
ERROR opening /dev/js0
Raydium: sound: Buffer creation successfull
Raydium: sound: OK, using 'default device'
Raydium: PHP support: OK
Raydium: atexit functions: OK
Raydium: lights: OK
Raydium: objects: OK
Raydium: network: OK
Raydium: timer: detection: 1 iterations: diff: 3 steps (1000000/sec)
Raydium: timecall: method accuracy = 0.003 ms (333333.34 Hz)
Raydium: timecall: Using basic gettimeofday() method
Raydium: timecall: OK (333333 Hz)
Raydium: timecall: softcall 0: 1 Hz (1000000 clocks interval)
Raydium: particle: OK
Raydium: gui: OK
Raydium: video (live): OK
Raydium: shadow: OK
Raydium: webserver: OK
Raydium: Raydium engine reseted to original state
Raydium: timecall: callback 1: 400 Hz (2500 clocks interval)
Raydium: physics: ODE Net: 10 element(s)/packet
Raydium: physics: OK
Raydium: RegAPI: OK
Raydium: Engine is now ready.
-----------------------------------------------------------
Raydium: sound: Tried to set negative or 0 Pitch , clipped to 0.1
Raydium: Texture num 1 (BOXfront.tga) loaded: 512x512, 3 Bpp (b0 lm0)
Raydium: Texture num 2 (BOXback.tga) loaded: 512x512, 3 Bpp (b0 lm0)
Raydium: Texture num 3 (BOXleft.tga) loaded: 512x512, 3 Bpp (b0 lm0)
Raydium: Texture num 4 (BOXright.tga) loaded: 512x512, 3 Bpp (b0 lm0)
Raydium: Texture num 5 (BOXbottom.tga) loaded: 512x512, 3 Bpp (b0 lm0)
Raydium: Texture num 6 (BOXtop.tga) loaded: 512x512, 3 Bpp (b0 lm0)
Raydium: Texture num 7 (theme-maniadrive.tga) loaded: 256x256, 4 Bpp (b1 lm0)
Raydium: Texture num 8 (font3.tga) loaded: 512x512, 1 Bpp (b1 lm0)
Raydium: timecall: softcall 2: 1 Hz (1000000 clocks interval)
Raydium: Changing game state to 1
Raydium: timecall: WARNING ! 0 Hz callback (num 1)
Raydium: Texture num 9 (video) FAKED: 256x256, 3 Bpp (b0 lm0)
Raydium: live: texture 'video' created
Raydium: video: mania_menu_v1.jpgs (0) as live texture video (0), 256x256 20.00 fps (703 frames)
Raydium: Texture num 10 (BOXmania_cursor.tga) loaded: 32x32, 4 Bpp (b1 lm0)
Raydium: Texture num 11 (mania_logo2.tga) loaded: 512x512, 3 Bpp (b0 lm0)
Raydium: Texture num 12 (BOXmania_music_popup.tga) loaded: 512x128, 4 Bpp (b1 lm0)
Raydium: Texture num 13 (font2.tga) loaded: 512x512, 1 Bpp (b1 lm0)
Raydium: Changing game state to 2
Raydium: timecall: callback 1: 400 Hz (2500 clocks interval)
Raydium: WARNING: timecall's too long
Complété

Ma configuration :
Ati Radeon 9800
Deux écran configurés en dual screen (donc du 2560*1024 au total)
Driver ATI fglrx
X.org 4.3

En espérant que ça aide ...