Re: glxgears slow under 2.6, fast under 2.4

[Andrew Schulman <andrex@alumni.utexas.net>]

> Things are very slow for me under 2.6 kernels.  Under 2.4.16 I was 
able to
> play tuxracer just fine, but under 2.6.6 things are so slow that it is
> unplayable (a second or so pause between command and action).  I ran glxgears
> under 2.4.16 and got output like:
>     2430 frames in 5.0 seconds = 486.000 FPS
> Under 2.6.6 I get output like:
>     1332 frames in 5.0 seconds = 266.400 FPS
> I ran glxinfo and noticed that under 2.4.16 direct rendering was YES but it
> was NO under 2.6.6. 

Try the suggested fix at 
http://home.comcast.net/~andrex/Debian-nVidia/troubleshooting.html#nodri 
(I know you're not using an nVidia card, but the fix described there is 
generic).

Good luck,
Andrew.