Bug 28538

Summary:	Mesa 7.8.1 for the RV250 or Radeon 9000 is broke
Product:	Mesa	Reporter:	Brian Beardall <brian>
Component:	Drivers/DRI/r200	Assignee:	Default DRI bug account <dri-devel>
Status:	RESOLVED FIXED	QA Contact:
Severity:	normal
Priority:	medium
Version:	unspecified
Hardware:	x86 (IA32)
OS:	Linux (All)
Whiteboard:
i915 platform:		i915 features:

Description Brian Beardall 2010-06-14 10:32:41 UTC

I've tested with two different computers in regards to the RV250 Mesa code. This code has been broke since at least Mesa 7.5. The two computers have different hardware with the only common piece of hardware being the video card. So I believe that the other pieces of hardware have very little to do with this bug. One computer is an Intel Pentium III, and the other is an AMD Athlon (Slot A version). Both computers are running Gentoo. The Pentium III is running xorg-server-1.8.1, and the AMD Athlon is running xorg-server-1.7.6. Both computers exhibit the exact same behavior in regards to the running of OpenGL programs. 

The test:
Run glxgears

The results:
A blank window with no gears. 

Expected results:
A window that has spinning gears.

Other programs known to not display correctly too:
googleearth, trigger.


Due to the wide differences in hardware and a similar discrepancy in the software the recreation of this bug should be quite simple as just upgrading to Mesa 7.8. I don't experience this behavior on the ATI Radeon 9250 with the RV280 core.

Comment 1 Alex Deucher 2010-06-14 10:52:26 UTC

If you are using kms, this was fixed in:
http://git.kernel.org/?p=linux/kernel/git/airlied/drm-2.6.git;a=commitdiff;h=cf22f20ade30f8c03955324aaf27b1049e182600

Comment 2 Brian Beardall 2010-06-14 14:54:15 UTC

The computers are using UMS and so that wouldn't be the case. I could try KMS to see if the bug is exhibited there, but I wanted the kernels be the same. Do you want me to try KMS?

Comment 3 Michel Dänzer 2010-06-15 00:24:36 UTC

AFAICT the fix applies to UMS, not KMS.

Comment 4 Alex Deucher 2010-06-15 08:11:56 UTC

Sorry; yes, it is UMS.  Brian, that patch should fix your issue.

Comment 5 Brian Beardall 2010-06-15 09:36:39 UTC

I tested the patch and it fixes the issue. Now if this small patch could make it into the next point release that would be really nice.

Comment 6 Alex Deucher 2010-06-15 10:12:35 UTC

stable was cced so it should show up in the next release.

Use of freedesktop.org services, including Bugzilla, is subject to our Code of Conduct. How we collect and use information is described in our Privacy Policy.