[CLUE-Tech] OpenGL being lazy?

[ian]

My experience is that in default Xfree86 & RedHat configuration
any type of DRI/DRM or XAA (both hardware acceleration methods) 
are not turned on.  Usually its a driver specific setting that
needs to be enabled. 

You can check if DRI is enabled by looking at the
XFree86.0.log (the log made of the console messages sent out
when starting Xfree).

It will say in there something to the extent of

Using XFree86 Acceleration Architecture (XAA) 

Then test it by running glxinfo.  If it says direct rendering:yes
then you should be set to go.  Otherwise its doing OpenGL in
software only. 

Much more detailed information at dri.sourceforge.net

ian


On Sun, Jun 03, 2001 at 06:21:44PM -0600, R Frank wrote:
> Experimenting with a new motherboard (ABIT KT7A-RAID),
> I'm in a quandry.  I'm running with a 1 GHz Athlon
> with 512 MB of 133ns memory and a G400 in 4X AGP mode.
> OpenGL is installed.  I'm playing an MP3 using XMMS.
> CPU utilization is at about 3%; no surpirse.  But when
> I turn on the OpenGL spectrum analyzer, CPU util goes up
> to 95% or higher.  That doesn't seem right at all.
> I thought the deal with OpenGL is that the video card
> did most of the work.  Maybe the OpenGL piece is not
> working an the CPU is doing bitblt transfers to do the
> 3D spectrum display?  Is there a way to switch OpenGL
> on and off if only to verify that it's doing something?
> (Other tech details: kernel 2.4.2, XFree86 Version 4.0.2)
> 
> Every time I figure out one thing two new things pop
> up to be explored.  Alas.
> 
> Roger Frank
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