[UFO Chicago] optimization of OpenGL/SDL

[Rob Latham]

On Sun, Jul 28, 2002 at 09:41:27PM +0100, Sean Neakums wrote:
 
> The output of glxinfo would be a useful starting point.  I forget
> exactly what indicates that hardware support is present, though.
> Somebody else might.

cryptic exerpts:

[0] aragorn:~% glxinfo | grep direct
direct rendering: Yes
[0] aragorn:~% grep DRI /var/log/xdm.log 
(II) R128(0): [DRI] installation complete

[0] aragorn:~% grep dri /etc/X11/XF86Config-4
        Load "dri"
Section "dri"
[0] aragorn:~% grep -C dri /etc/X11/XF86Config-4
        Load  "drm"
        Load  "glx"
        Load "dri"
        Load  "pex5"
        Load  "record"
--
EndSection

Section "dri"
        Mode 0666
EndSection

and now some more meager explanations:
you need kernel support (direct rendering manager, DRM):
[0] aragorn:~% grep R128 /boot/config-`uname -r`
CONFIG_DRM_R128=m

for your g200 card, that's CONFIG_DRM_MGA

Configure.help says you need agpgart support too (CONFIG_AGP).  i
don't have a g200 card, so i'm just the messenger.

I don't remember the gl libraries you need. i set it up a year ago and
promptly forgot it all :<

the other gotcha was the XFree86 color depth. i spent months trying to
figure out what piece i missed, but in the end it ended up that a
color depth of 15 ( and not 16) would do the trick.

i could have sworn theres a DRI howto somewhere. both google and
tldp.org failed me.  Debian's
/usr/share/doc/xserver-xfree86/README.DRI.gz should be a good start.
I'm sure other distributions have README.DRI in some form in a
comparable location.

good luck.  bug if you can't get things working.
==rob



> 
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