Just mucking about at work again.So I’ve ruled out AIGLX/Beryl on my work PC, because the proprietary drivers don’t have a particular extension to use AIGLX. However I can still try XGL/Beryl, if I can get the fglrx drivers to work.
Trying these instructions again, first install the fglrx driver with this command
sudo aptitude install xorg-driver-fglrx
Next we need to reconfigure the Xorg configuration file. Rather than manually like for enabling AIGLX, we can do it by reconfiguring the xserver-xorg package
sudo dpkg-reconfigure xserver-xorg
If you have ever seen the inside of the Xorg configuration file /etc/X11/xorg.conf, you will probably notice the questions that accompany lines you often edit without knowing why.
The first part of the reconfiguration deals with which driver to use for the X server. This is important and fglrx must be selected.

Other options will include the the PCI bus it is located on, keyboard and mouse settings, monitor resolution and similar options. If the X Server has been working correctly before this reconfiguration, you can just leave these values alone, and accept them as they appear.


The process will exit and copy the old configuration file to a unique filename, based on the date and time, in case you need to go back.
Finally you need to restart the PC, to make sure that the fglrx module is loaded (restarting the X Server doesn’t cut it here), and then observe the changes.
liam@liam-desktop:~$ fglrxinfo
display: :0.0 screen: 0
OpenGL vendor string: ATI Technologies Inc.
OpenGL renderer string: RADEON X300/X550 Series Generic
OpenGL version string: 2.0.6011 (8.28.
liam@liam-desktop:~$ fgl_glxgears
Using GLX_SGIX_pbuffer
867 frames in 5.0 seconds = 173.400 FPS
1120 frames in 5.0 seconds = 224.000 FPS
1114 frames in 5.0 seconds = 222.800 FPS
1130 frames in 5.0 seconds = 226.000 FPS
1098 frames in 5.0 seconds = 219.600 FPS
liam@liam-desktop:~$
For some reason all my GTK fonts have become very small, but otherwise there doesn’t seem to be any real issues. So now onto XGL and Beryl again.