Re: Why is glxgears so slow on new install?

On Sun, 12 Mar 2006 01:00:06 +0100, "J.O. Aho" <user@xxxxxxxxxxx>
wrote:

larryalk wrote:
I am _presuming_ that glxgears being much slower indicates something
wrong.

Speed depends on screen resolution and depth, desktop environment, other
programs running in the background and if tv-out is enabled or not.

Screen resolution and depth was the same in both cases, both running
kde 3.4, no other program of any note and no tv-out.


Running glxgears on the new machine using my very old xorg.conf (used
to be xf86config) glxgears give 8 times the speed (1600 fps)
as on a new xorg.conf (196 fps) created with xorgconfig and I cannot
understand why.

If you use the closed source drivers from ATi or nVidia in your old, these
aren't usually not used when you re-configure Xorg/XFree86 with the
configuration tools that comes with it and in many cases the open source
drivers are slower specially when it comes to 3D.

I wasn't using the closed source drivers.
In fact, I have not found any for my board ATI Radeon 7500.
So I'm using whatever xorg is giving me.


Keep in mind that a badly installed driver may not use the right opengl libs,
but MESA which is really slow as every 3D calculation is done in CPU instead
of GPU.

Did you mean VESA? Although Slack comes with a nice VESA driver, I
opted to run xorgconfig and specify my hardware.


The only thing I can think of is that something may have changed in X
itself but I don't know how to go about troubleshooting that.

As long as you don't have installed a development version (usually has a hign
last number as 6.8.996)
Using x11-6.8.2-i486-3, not a development version of X.


//Aho

I appreciate your response.
Larry

--
My real sig is much better.
.