Ubuntu Oneiric Installation Guide
From cchtml.com
What worked for me to get OpenGL rinnung on my ATI Radeon Xpress 200M was to turn off the Composite extension in xorg.conf. I've rinnung the ATI proprietary drivers version 8.33.6-1 on Ubuntu Edgy 8.10. From what I read, the most recent versions of xorg turn on the Composite feature by default. I added these lines to my xorg.conf:Section Extensions Option Composite Disable EndSection