[Bug 42175] New: RV730: Display errors in glxgears & WebGL

[Bug 42175] New: RV730: Display errors in glxgears & WebGL

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https://bugs.freedesktop.org/show_bug.cgi?id=42175

             Bug #: 42175
           Summary: RV730: Display errors in glxgears & WebGL
    Classification: Unclassified
           Product: Mesa
           Version: git
          Platform: x86-64 (AMD64)
        OS/Version: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Drivers/Gallium/r600
        AssignedTo: dri-devel@lists.freedesktop.org
        ReportedBy: kdevel@vogtner.de


Since Mesa 7.11-rc2 the gallium driver is used on my machine and produces
display errors. Find attached a glxgears screenshot and a screendump of
http://learningwebgl.com/lessons/lesson03/index.html produced with the current
Firefox.

Before and including 7.11-rc1 seemed to use the old driver which does not
produce rendering errors but which crashes Firefox in
http://learningwebgl.com/lessons/lesson16/index.html or in the Aquarium of
http://code.google.com/p/webglsamples/.

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[Bug 42175] RV730: Display errors in glxgears & WebGL

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https://bugs.freedesktop.org/show_bug.cgi?id=42175

--- Comment #1 from Stefan <kdevel@vogtner.de> 2011-10-24 14:06:39 PDT ---
Created attachment 52710
  --> https://bugs.freedesktop.org/attachment.cgi?id=52710
glxgears screenshot

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[Bug 42175] RV730: Display errors in glxgears & WebGL

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https://bugs.freedesktop.org/show_bug.cgi?id=42175

--- Comment #2 from Stefan <kdevel@vogtner.de> 2011-10-24 14:07:44 PDT ---
Created attachment 52713
  --> https://bugs.freedesktop.org/attachment.cgi?id=52713
Lesson 3 screenshot

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[Bug 42175] RV730: Display errors in glxgears & WebGL

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https://bugs.freedesktop.org/show_bug.cgi?id=42175

--- Comment #3 from Alex Deucher <agd5f@yahoo.com> 2011-10-24 14:44:38 PDT ---
Can you bisect?

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[Bug 42175] RV730: Display errors in glxgears & WebGL

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https://bugs.freedesktop.org/show_bug.cgi?id=42175

--- Comment #4 from Stefan <kdevel@vogtner.de> 2011-10-24 14:55:59 PDT ---
(In reply to comment #3)
> Can you bisect?

The change took place between 7.11-rc1 and -rc2:

a8907c6005d7935b4520255e12184c139471b5b9 is the first bad commit
commit a8907c6005d7935b4520255e12184c139471b5b9
Author: Benjamin Franzke <benjaminfranzke@googlemail.com>
Date: Sat Jul 2 13:41:35 2011 +0200

But: This is where the switch from the old driver to the Gallium takes place.
The old driver got used in my configuration up to 7.11-rc1 because the
udev-devel packet was not installed. Eventually after installing it 7.11-rc1
uses the new driver.

So currently I don't have a "good" reference for a bisection.

BTW: https://bugzilla.mozilla.org/show_bug.cgi?id=693056 (origin of the current
problems).

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[Bug 42175] RV730: Display errors in glxgears & WebGL

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https://bugs.freedesktop.org/show_bug.cgi?id=42175

--- Comment #5 from Stefan <kdevel@vogtner.de> 2011-10-24 17:32:00 PDT ---
Mesa 7.12-devel (git-faa16dc) Works. No crash, no picture errors.

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[Bug 42175] RV730: Display errors in glxgears & WebGL

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--- Comment #6 from Michel Dänzer <michel@daenzer.net> 2011-10-25 08:00:08 PDT ---
(In reply to comment #5)
> Mesa 7.12-devel (git-faa16dc) Works. No crash, no picture errors.

What about the current 7.11 branch? If that still shows the display errors, you
should be able to bisect the change that fixed it on the master branch.

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[Bug 42175] RV730: Display errors in glxgears & WebGL

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https://bugs.freedesktop.org/show_bug.cgi?id=42175

--- Comment #7 from Stefan <kdevel@vogtner.de> 2011-10-25 08:16:45 PDT ---
(In reply to comment #6)
> What about the current 7.11 branch? If that still shows the display errors, you
> should be able to bisect the change that fixed it on the master branch.

No bisection required. The bug was fixed by this commit:

"r600g: set correct tiling flags in depth info"
http://cgit.freedesktop.org/mesa/mesa/commit/?id=faa16dc456f1f910eef24eaa23889be806b513b7

which I just verified by re-compiling mesa with the reversed patch applied.

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[Bug 42175] RV730: Display errors in glxgears & WebGL

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https://bugs.freedesktop.org/show_bug.cgi?id=42175

--- Comment #8 from Michel Dänzer <michel@daenzer.net> 2011-10-26 01:47:13 PDT ---
(In reply to comment #7)
> No bisection required. The bug was fixed by this commit:
> 
> "r600g: set correct tiling flags in depth info"
> http://cgit.freedesktop.org/mesa/mesa/commit/?id=faa16dc456f1f910eef24eaa23889be806b513b7

Weird, as the commit log says, it's supposed to be a no-op ATM...

Marek, does this make sense to you? Should this change be backported to the
7.11 branch?

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[Bug 42175] RV730: Display errors in glxgears & WebGL

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https://bugs.freedesktop.org/show_bug.cgi?id=42175

--- Comment #9 from Marek Olšák <maraeo@gmail.com> 2011-10-26 05:29:24 PDT ---
No, it doesn't make sense. :) He might have an older, more buggy kernel than
me. That would be the only explanation. I was working with the latest drm-fixes
branch (3.1 rc10). Anyway I think the fix can safely go into 7.11.

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[Bug 42175] RV730: Display errors in glxgears & WebGL

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https://bugs.freedesktop.org/show_bug.cgi?id=42175

--- Comment #10 from Stefan <kdevel@vogtner.de> 2011-10-26 05:38:41 PDT ---
(In reply to comment #9)
> He might have an older, more buggy kernel than me.

I'm using the longterm kernel 2.6.35.14.

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[Bug 42175] RV730: Display errors in glxgears & WebGL

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Michel Dänzer <michel@daenzer.net> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|                            |FIXED

--- Comment #11 from Michel Dänzer <michel@daenzer.net> 2011-10-26 06:07:50 PDT ---
Marek backported the fix to the 7.11 branch, thanks.

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