[ut2004] Couldn't find matching GLX visual

[Gian Paolo Mureddu]

I can only think of two possibilities left: kernel re-compilation with 
radeon support under chardevices --> DRM --> radeon turned ON or get the 
latest DRI driver from dri.sourceforge.net, you my check if you have the 
DRM module, should be under ls /lib/modules/`uname 
-r`/kernel/drivers/char/drm/radeon*, depending on your kernel version it 
will be a module called radeon.o (2.4.x kernels) or radeon.ko (2.6.x)...