Re: [Mesa3d-users] DRI/Redhat/Mesa issues

[Brian P. <br...@va...>]

Xipetotec wrote:
> 
> How can I get better and more consistent performance
> from Mesa?
> 
> I have found major performance differences for Mesa,
> depending on how it has been installed. Problem is,
> each installation is good in one circumstance, and bad
> in another.
> 
> If I install Mesa via Redhat's installer, the
> performance using a GLX-based windowing system is OK,
> but Glut-based programs run with extremely low
> framerates, and barely respond to mouse or keyboard
> input.
> 
> If, on the other hand, I re-install Mesa again from a
> freshly downloaded source, the GLX system's
> performance degrades badly, including the slow input
> response, but the Glut programs work fairly well.
> 
> I am running Redhat 7.1 on a Dell Inspiron 5000e
> laptop. It has an ATI Rage mobility with 16 mb of Ram,
> that, on it's Win98 boot, gives very good 3D
> performance (for a laptop. OpenGL generally is more
> reliable than Directx, in Win98.
> 
> Any suggestions? I have thought about having two
> versions of X to run Mesa programs from, one for Glut
> and one for GLX, but it seems like something that
> should be fixable by better configuration. Neither
> installation performs nearly as well as openGL on
> Win98. I am a relative novice with respect to Linux,
> so don't assume that I have tried any remedies that
> might seem obvious to a more experienced user.

RedHat's Mesa libGL is DRI-aware (for hardware acceleration)
while ordinary Mesa's libGL is not (software rendering only).

Sounds like that's the problem.  Try running glxinfo with
both scenarious and see what the "renderer" line reports.

-Brian