glx for ati radeon on kubuntu with open source drivers
symptoms:
This applies mostly to older ati cards using the r300 driver, maybe others. My card is an r482 which basically runs off the r300 driver.
when you run glxinfo:
…
Xlib: extension “GLX” missing on display “:0”.
Error: couldn’t find RGB GLX visual or fbconfig
maybe also this is in your Xorg log:
(EE) Failed to load module “fglrx” (module does not exist, 0)
and/or:
(EE) Failed to initialize GLX extension (Compatible NVIDIA X driver not found)
do this (some of the commands may spit errors or warn of removing seemingly necessary packages… hard as it is, ignore it and keep on a-moving):
sudo apt-get purge nvidia* #it’s okay if it threatens to remove kubuntu-desktop… it’s a meta file and wont remove kdm
sudo apt-get remove —purge fglrx*
sudo apt-get remove —purge xserver-xorg-video-ati xserver-xorg-video-radeon
sudo apt-get install xserver-xorg-video-ati
sudo apt-get install —reinstall libgl1-mesa-glx libgl1-mesa-dri xserver-xorg-core
sudo dpkg-reconfigure xserver-xorg
but wait, there’s more. Even if you get it working now, it may bungle out again with little explanation why. May as well take care of this now:
sudo nano ~/.kde/share/config/kwinrc
DisableChecks=false
OpenGLisUnsafe=false
ctrl-x, y
you’re good to go.
Link and credit :
From Slicing Light at :
http://chrismedinger.com/post/6858819316/glx-on-kubuntu-ati
