Bug#396037: libgl1-mesa-dri: i915 OpenGL severely broken

[Brice Goglin]

forwarded 396037 https://bugs.freedesktop.org/show_bug.cgi?id=9199
thank you



Martin Pärtel wrote:
> xserver-xorg-video-i810-modesetting_1.7.2.git20070210-1_i386.deb
> (also tried without the "modesetting" driver; no difference)

The backtrace indicates either a problem in the i915 module
(libgl1-mesa-dri package) or in
/usr/lib/xorg/modules/extensions/libglx.so (xserver-xorg-core package).
The i810 driver does
not seem involved.

I found the same backtrace on the same graphic board in the upstream
bugzilla at https://bugs.freedesktop.org/show_bug.cgi?id=9199. There has
been no reply so far, but the bug was not against the right component, so...

I reassigned it correctly. It would be nice if you could summarize all
your conclusions there. Note that I found your last mail pretty hard to
understand since there are lots of combinations of
modules/envvar/packages involved. It would be nice to explain in a
simple way how to reproduce the bug and what works around it. Note that
upstream does not really like old versions, so be prepared to have to
reproduce with xserver-xorg-core (2:1.2.99.903-1) or
xserver-xorg-video-intel (2:1.9.93-1) currently in experimental :) Mesa
6.5.2-3 is fine.

> At first OpenGL apps were much slower and had different (but still ugly)
> rendering artifacts than before, but after adding Load "dbe" and
> Option "XAANoOffscreenPixmaps" (not sure which one helped, sorry) to
> xorg.conf the speed went back to normal. Adding those options didn't
> seem to
> have change anything after I had reverted back to sid packages.

Hum, I don't know anything about this dbe option...

> So, the working combination was:
> - experimental packages (except i810-modesetting)
> - Load "dbe" (or Option "XAANoOffscreenPixmaps"?)
> - _no_ LIBGL_ALWAYS_INDIRECT.

All at the same time? Or any of these lines?

Thanks a lot,
Brice