etch amd64能用beryl吗，我的不行？

josephpei

amd64 3600, ati 1950GT
etch amd64 kernel 2.6.18
ati driver:8.36
信息如下：
josephpei@josephpei:~$ fglrxinfo
display: :0.0  screen: 0
OpenGL vendor string: ATI Technologies Inc.
OpenGL renderer string: ATI Radeon X1950 GT
OpenGL version string: 2.0.6458 (8.36.5)

josephpei@josephpei:~$ fgl_glxgears
Using GLX_SGIX_pbuffer
7527 frames in 5.0 seconds = 1505.400 FPS
8429 frames in 5.0 seconds = 1685.800 FPS
8916 frames in 5.0 seconds = 1783.200 FPS
8891 frames in 5.0 seconds = 1778.200 FPS
8911 frames in 5.0 seconds = 1782.200 FPS
8920 frames in 5.0 seconds = 1784.000 FPS
8926 frames in 5.0 seconds = 1785.200 FPS
8070 frames in 5.0 seconds = 1614.000 FPS
7702 frames in 5.0 seconds = 1540.400 FPS
8450 frames in 5.0 seconds = 1690.000 FPS
8470 frames in 5.0 seconds = 1694.000 FPS
8958 frames in 5.0 seconds = 1791.600 FPS
死活看不到3D桌面

x11

glxinfo呢