I am using ubuntu 5.10(In fact i use freebsd6.1/ubuntu5.10/windows xp tri-system.) and I have installed ati's 8.29.6 drivers for my RADEON 9550 card. everything works fine even the video acceleration. The only problem is that when I play a video(using mplayer -vo xv)are invalid. Then i type "xvinfo"and "fglrxinfo",it show:
xiang1206@ubuntu:~$ xvinfo
X-Video Extension version 2.2
screen #0
no adaptors present.

xiang1206@ubuntu:~$ fglrxinfo
display: :0.0 screen: 0
OpenGL vendor string: ATI Technologies Inc.
OpenGL renderer string: RADEON 9550 Generic
OpenGL version string:
2.0.6065 (8.29.6)

i add
UseInternalAGPGART "no"
PseudoColorVisuals "yes"
VideoOverlay "on"
OpenGLOverlay "off" to /etc/X11/xorg.conf
but problem is all the same!

Can you help me? I think the problem is the RADEON 9550 card don't support X-Video,However,i can use mplayer -vo xv /home/mover/*.rmvb when i use freebsd6.1, and "xvinfo" show is correct in freebsd6.1.
If you want some screenshots I will provide them.

thanks in advance.