sorry, слил кучу траффика практически в трубу, но так и не нашел солюшена...
Вот симптом:
pilat@pilat-desktop:~$ fglrxinfo -display :1
Xlib: extension "XFree86-DRI" missing on display ":1.0".
display: :1.0 screen: 0
OpenGL vendor string: ATI Technologies Inc.
OpenGL renderer string: Radeon X1600 Series
OpenGL version string: 1.2 (2.0.6334 (8.34.8))
pilat@pilat-desktop:~$ glxinfo
name of display: :1.0
Xlib: extension "XFree86-DRI" missing on display ":1.0".
display: :1 screen: 0
direct rendering: No
server glx vendor string: SGI
server glx version string: 1.2
...
А вот, собственно, загвоздка (imo):
pilat@pilat-desktop:~$ cat /var/log/Xorg.0.log | grep "AIGLX"
(==) AIGLX enabled
(EE) AIGLX error: dlsym for __driCreateNewScreen_20050727 failed (/usr/lib/dri/fglrx_dri.so: undefined symbol: __driCreateNewScreen_20050727)
(EE) AIGLX: reverting to software rendering
Сразу просьба
не советовать отключить Composite либо AIGLX, вот выдержки из xorg.conf:
Section "Module"
Load "i2c"
Load "bitmap"
Load "ddc"
Load "dri"
Load "extmod"
Load "freetype"
Load "glx"
Load "int10"
Load "vbe"
EndSection
...
Section "Device"
Identifier "aticonfig-Device[0]"
Driver "fglrx"
EndSection
...
Section "Extensions"
Option "Composite" "Disable"
EndSection
Section "DRI"
Mode 0666
EndSection
Section "ServerFlags"
Option "AIGLX" "off"
EndSection
Карточка: Sapphire Ultimate X1600XT
Proprietary driver: OpenGL version string: 1.2 (2.0.6334 (8.34.

)
uname -a: Linux pilat-desktop 2.6.20-16-generic #2 SMP Thu Jun 7 20:19:32 UTC 2007 i686 GNU/Linux