[i965] Open GL Renders flat surfaces incorrectly

Flat surfaces in games/OpenGL apps render oddly, making it very hard to use them.

Other than that, I really have no further information.

Hardy Beta x86
Graphics Card: Display controller: Intel Corporation Mobile GM965/GL960 Integrated Graphics Controller (rev 0c)

SCREENSHOTS:
http://farm4.static.flickr.com/3184/2299007958_6a34ce5bb1_o.jpg

Could you please attach xorg.conf and xorg.0.log?

Xorg.conf

xorg.0.log

Just for confirmation: I have the same effect here with game sauerbraten on hardy with GM965 chipset.

Do you have INTEL_BATCH=1 enabled/added?

I enabled INTEL_BATCH=1, but nothing happened. I experienced the same problems that I had without this enabled.

Sort of sounds like it might be bug 96991 - does the issue go away if you turn off compiz? If so, then this is just a dupe of that bug, and will be fixed when TTM becomes available (Intrepid or Intrepid+1 probably).

Also, INTEL_BATCH=1 is not recommended - according to upstream, in theory it can cause instabilities for certain corner cases, so if you don't notice a benefit from it, don't use it.

I never turn on compiz, in fact, I removed the packages from my install.

This was working correctly in the previous Hardy Alphas, and in Gutsy.

Ah, then perhaps it was the "greedy" migration heuristic bug that triggered it. Do you remember which of the Alphas that it last worked, and which one it started to misbehave? Or do you recall the driver version where the problem started?

It was around Alpha 4 that it stopped working, I think.

My skills at memorization still need refining.

I guess it could be tested through adding the line
Option "MigrationHeuristic" "always"
to your xorg.conf device section and restarting X.
This should enable the previous default mode.

That did not change anything, so I guess it wasn't that problem.

No, I think with the patch we did, we force "greedy" regardless of what's set in xorg.conf. Perhaps what we should do is collect pci id's of people experiencing this problem and not set "greedy" in those cases. Not sure.

confirmed same issue Mobile GM965/GL960 Integrated Graphics Controller

Games are unplayable (SDL I think), compiz has no effect, worked in gutsy

I think this bug is confirmed...

Anyone want to change the status, or provide a workaround?

Has anyone proofed with the older Intel driver/ oldHardy Live CD if it is really the fault of Greedy?

which alpha was greedy turned on at? I'll test it.

Greedy was enabled for i965 chipset with Intel driver version 2:2.2.0.90-2ubuntu4 on 14 Feb 2008 so it should be Hardy Alpha 4. The problem is that not only greedy was activated since then but a new Intel upstream release was uploaded afaik.

Maybe you could post a package with Greedy disabled here so that we can test and tell you if it works better?

note that the 3D-bits are in mesa, not the intel driver. That said, to get the default EXA behaviour, use 'Option "MigrationHeuristic" "always"'.

'Option "MigrationHeuristic" "always"'.

does not fix the issue..... if any thing it seemed slightly worse (but that might be my imagination)

Looking at the screenshot it looks like the same problem as in bug #199823. The good news is that it is supposed to be fixed upstream.

The patch is available there: https://bugs.freedesktop.org/show_bug.cgi?id=14940

Couldn't you repackage libgl1-mesa-glx and apply this patch (please :)?

pretty please......

Just so you know. I repackaged mesa after applying the patch from the other bug report. My games are working fine again now :) I think it would really be nice if you packaged a patched version (or maybe a git snapshot) for Hardy. A lot of users have this video chipset...

By the way, the bug can be marked as a duplicate (this one is the same: #199823)

Uhh, n00b question.

How do I apply this patch?

Alternative: Is there any way I can get a package with the patch applied?

Thanks

You can use mine (http://www.dchris.eu/libmesa). I'm using them and it works.

Dude....

I love you.

(not in any sick or perverted way)

This bug was fixed in the package mesa - 7.0.3~rc2-1ubuntu3

---------------
mesa (7.0.3~rc2-1ubuntu3) hardy; urgency=low

  * debian/patches/107_fix_-ve_rhw_regression.patch: Fixes regression
    introduced upstream where a -ve rhw workaround is being applied only
    for IGD systems, when it should be applied only for *non*-IGD systems.
    This resulted in rendering issues in 3D games and drawing programs.
    (LP: #199823, #206287)

 -- Bryce Harrington <email address hidden> Fri, 04 Apr 2008 19:46:40 -0700

Thanks, but I read somewhere that mesa 7.0.3 final was released :)