Voila ce que cela me donne :
cat /var/log/Xorg.0.log | grep EE && cat /var/log/Xorg.0.log | grep WW
(WW) warning, (EE) error, (NI) not implemented, (??) unknown.
(II) Loading extension MIT-SCREEN-SAVER
(WW) warning, (EE) error, (NI) not implemented, (??) unknown.
(WW) Open ACPI failed (/var/run/acpid.socket) (No such file or directory)
(WW) Falling back to old probe method for fglrx
(WW) This ATI Proprietary Linux Driver does not guarantee support of video driver ABI higher than 2.0
(WW) Video driver ABI version of the X server is 4.1
(WW) fglrx(0): board is an unknown third party board, chipset is supported
(WW) fglrx(0): Unknown vendor-specific block f
(WW) fglrx(0): Only one display is connnected,so single mode is enabled
(WW) AIGLX: 3D driver claims to not support visual 0x23
(WW) AIGLX: 3D driver claims to not support visual 0x24
(WW) AIGLX: 3D driver claims to not support visual 0x25
(WW) AIGLX: 3D driver claims to not support visual 0x26
(WW) AIGLX: 3D driver claims to not support visual 0x27
(WW) AIGLX: 3D driver claims to not support visual 0x28
(WW) AIGLX: 3D driver claims to not support visual 0x29
(WW) AIGLX: 3D driver claims to not support visual 0x2a
(WW) AIGLX: 3D driver claims to not support visual 0x2b
(WW) AIGLX: 3D driver claims to not support visual 0x2c
(WW) AIGLX: 3D driver claims to not support visual 0x2d
(WW) AIGLX: 3D driver claims to not support visual 0x2e
(WW) AIGLX: 3D driver claims to not support visual 0x2f
(WW) AIGLX: 3D driver claims to not support visual 0x30
(WW) AIGLX: 3D driver claims to not support visual 0x31
(WW) AIGLX: 3D driver claims to not support visual 0x32
(WW) AIGLX: 3D driver claims to not support visual 0x33
(WW) AIGLX: 3D driver claims to not support visual 0x34
(WW) AIGLX: 3D driver claims to not support visual 0x35
(WW) AIGLX: 3D driver claims to not support visual 0x36
(WW) AIGLX: 3D driver claims to not support visual 0x37
(WW) AIGLX: 3D driver claims to not support visual 0x38
(WW) AIGLX: 3D driver claims to not support visual 0x39
(WW) AIGLX: 3D driver claims to not support visual 0x3a
(WW) AIGLX: 3D driver claims to not support visual 0x3b
(WW) AIGLX: 3D driver claims to not support visual 0x3c
(WW) AIGLX: 3D driver claims to not support visual 0x3d
(WW) AIGLX: 3D driver claims to not support visual 0x3e
(WW) AIGLX: 3D driver claims to not support visual 0x3f
(WW) AIGLX: 3D driver claims to not support visual 0x40
(WW) AIGLX: 3D driver claims to not support visual 0x41
(WW) AIGLX: 3D driver claims to not support visual 0x42
(WW) AIGLX: 3D driver claims to not support visual 0x43
(WW) AIGLX: 3D driver claims to not support visual 0x44
(WW) AIGLX: 3D driver claims to not support visual 0x45
(WW) AIGLX: 3D driver claims to not support visual 0x46
(WW) AIGLX: 3D driver claims to not support visual 0x47
(WW) AIGLX: 3D driver claims to not support visual 0x48
(WW) AIGLX: 3D driver claims to not support visual 0x49
(WW) AIGLX: 3D driver claims to not support visual 0x4a
(WW) AIGLX: 3D driver claims to not support visual 0x4b
(WW) AIGLX: 3D driver claims to not support visual 0x4c
(WW) AIGLX: 3D driver claims to not support visual 0x4d
(WW) AIGLX: 3D driver claims to not support visual 0x4e
(WW) AIGLX: 3D driver claims to not support visual 0x4f
(WW) AIGLX: 3D driver claims to not support visual 0x50
(WW) AIGLX: 3D driver claims to not support visual 0x51
(WW) AIGLX: 3D driver claims to not support visual 0x52
(WW) AIGLX: 3D driver claims to not support visual 0x53
(WW) AIGLX: 3D driver claims to not support visual 0x54
(WW) AIGLX: 3D driver claims to not support visual 0x55
(WW) AIGLX: 3D driver claims to not support visual 0x56
(WW) AIGLX: 3D driver claims to not support visual 0x57
(WW) AIGLX: 3D driver claims to not support visual 0x58
(WW) AIGLX: 3D driver claims to not support visual 0x59
(WW) AIGLX: 3D driver claims to not support visual 0x5a
(WW) AIGLX: 3D driver claims to not support visual 0x5b
(WW) AIGLX: 3D driver claims to not support visual 0x5c
(WW) AIGLX: 3D driver claims to not support visual 0x5d
(WW) AIGLX: 3D driver claims to not support visual 0x5e
(WW) AIGLX: 3D driver claims to not support visual 0x5f
(WW) AIGLX: 3D driver claims to not support visual 0x60
(WW) AIGLX: 3D driver claims to not support visual 0x61
(WW) AIGLX: 3D driver claims to not support visual 0x62
(WW) AIGLX: 3D driver claims to not support visual 0x63
(WW) AIGLX: 3D driver claims to not support visual 0x64
(WW) AIGLX: 3D driver claims to not support visual 0x65
(WW) AIGLX: 3D driver claims to not support visual 0x66
(WW) AIGLX: 3D driver claims to not support visual 0x67
(WW) AIGLX: 3D driver claims to not support visual 0x68
(WW) AIGLX: 3D driver claims to not support visual 0x69
(WW) AIGLX: 3D driver claims to not support visual 0x6a
(WW) AIGLX: 3D driver claims to not support visual 0x6b
(WW) AIGLX: 3D driver claims to not support visual 0x6c
(WW) AIGLX: 3D driver claims to not support visual 0x6d
(WW) AIGLX: 3D driver claims to not support visual 0x6e
(WW) AIGLX: 3D driver claims to not support visual 0x6f
(WW) AIGLX: 3D driver claims to not support visual 0x70
(WW) AIGLX: 3D driver claims to not support visual 0x71
(WW) AIGLX: 3D driver claims to not support visual 0x72
(WW) <default pointer>: No Device specified, looking for one...