[Bug 58033] New: [r300g] Black gap artifacts when playing WoW

[Bug 58033] New: [r300g] Black gap artifacts when playing WoW

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=58033

          Priority: medium
            Bug ID: 58033
          Assignee: dri-devel@lists.freedesktop.org
           Summary: [r300g] Black gap artifacts when playing WoW
          Severity: normal
    Classification: Unclassified
                OS: Linux (All)
          Reporter: rankincj@googlemail.com
          Hardware: x86 (IA32)
            Status: NEW
           Version: git
         Component: Drivers/DRI/r300
           Product: Mesa

When playing WoW with the latest Mesa from git, sometimes black lines and gaps
on the screen. These black spaces appear momentarily as I move around, like
intense shadows. Sometimes, the entire screen appears to go blank.

export RADEON_DEBUG=nohiz makes no difference, and no "acquiring HyperZ"
messages are printed on the console.

This is with a T60p laptop with a M66GL (RV535?) chip, running a 32 bit Linux
3.6.9 kernel.

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[Bug 58033] [r300g] Black gap artifacts when playing WoW

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https://bugs.freedesktop.org/show_bug.cgi?id=58033

Chris Rankin <rankincj@googlemail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
          Component|Drivers/DRI/r300            |Drivers/Gallium/r300

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[Bug 58033] [r300g] Black gap artifacts when playing WoW

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https://bugs.freedesktop.org/show_bug.cgi?id=58033

--- Comment #1 from Marek Olšák <maraeo@gmail.com> ---
Try: RADEON_DEBUG=nozmask

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[Bug 58033] [r300g] Black gap artifacts when playing WoW

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https://bugs.freedesktop.org/show_bug.cgi?id=58033

--- Comment #2 from Marek Olšák <maraeo@gmail.com> ---
Also try reverting the commit e866bd1adea2c3b4971ad68e69c6.

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[Bug 58033] [r300g] Black gap artifacts when playing WoW

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https://bugs.freedesktop.org/show_bug.cgi?id=58033

--- Comment #3 from Chris Rankin <rankincj@googlemail.com> ---
(In reply to comment #2)
> Also try reverting the commit e866bd1adea2c3b4971ad68e69c6.

I've tried this, and have also tried RADEON_DEBUG=nohiz,nozmask,nocbzb.
However, I'm still seeing the problem. Interestingly, the problem does not
happen with Fedora's "stock" Mesa drivers mesa-dri-drivers-8.0.4-1.fc17.i686.

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[Bug 58033] [r300g] Black gap artifacts when playing WoW

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https://bugs.freedesktop.org/show_bug.cgi?id=58033

--- Comment #4 from Alex Deucher <agd5f@yahoo.com> ---
Can you bisect?

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[Bug 58033] [r300g] Black gap artifacts when playing WoW

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https://bugs.freedesktop.org/show_bug.cgi?id=58033

--- Comment #5 from Chris Rankin <rankincj@googlemail.com> ---
(In reply to comment #4)
> Can you bisect?

Apparently, this is the bad commit:

39737e17e7a61535a35669756161005a7a5c887b is the first bad commit
commit 39737e17e7a61535a35669756161005a7a5c887b
Author: Marek Olšák <maraeo@gmail.com>
Date:   Mon Dec 3 01:26:22 2012 +0100

    st/dri: always allocate private depth-stencil buffers

    This disables DRI2 sharing of zbuffers. The window zbuffer is allocated
just
    like any other texture - through resource_create.

    The idea of allocating a zbuffer through DRI2 isn't very useful with MSAA,
    where a single-sample zbuffer is useless.

    IIRC, the Intel driver does the same thing.

    Reviewed-by: Brian Paul <brianp@vmware.com>

:040000 040000 e8045e2d2c7e9a1ebd6eb1f22c93b97b9c3e8ce7
4deb5755e011d592366e6140bf385bfefe157f3f M    src

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[Bug 58033] [r300g] Black gap artifacts when playing WoW

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https://bugs.freedesktop.org/show_bug.cgi?id=58033

--- Comment #6 from Chris Rankin <rankincj@googlemail.com> ---
This bug is still present after Marek's latest r300g commits: HEAD is

commit e3e1ffb2520498584ef402213d0c8aa4303a46a3
Author: Marek Olšák <maraeo@gmail.com>
Date:   Mon Jan 14 05:51:05 2013 +0100

    r300g: set a dummy vertex buffer in context_create

    so that the driver doesn't crash if an app doesn't set any vertex buffers.

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[Bug 58033] [r300g] Black gap artifacts when playing WoW

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https://bugs.freedesktop.org/show_bug.cgi?id=58033

--- Comment #7 from Tomasz P. <son_of_the_osiris@interia.pl> ---
Marek Olšák post some patches on mailing list that implementing separate
depth-stencil clear. Maybe they will help.

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[Bug 58033] [r300g] Black gap artifacts when playing WoW

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https://bugs.freedesktop.org/show_bug.cgi?id=58033

--- Comment #8 from Chris Rankin <rankincj@googlemail.com> ---
Still broken as of git HEAD:

commit ca39c0f94a4e3cc25b6cc9507fb729b85140733a
Author: Ian Romanick <ian.d.romanick@intel.com>
Date:   Wed Jan 16 15:34:49 2013 -0800

    mesa/es3: Don't check dimensions in _mesa_es3_error_check_format_and_type

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[Bug 58033] [r300g] Black gap artifacts when playing WoW

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https://bugs.freedesktop.org/show_bug.cgi?id=58033

--- Comment #9 from Marek Olšák <maraeo@gmail.com> ---
Could you please attach a screenshot showing the issue?

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[Bug 58033] [r300g] Black gap artifacts when playing WoW

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https://bugs.freedesktop.org/show_bug.cgi?id=58033

--- Comment #10 from Chris Rankin <rankincj@googlemail.com> ---
(In reply to comment #9)
> Could you please attach a screenshot showing the issue?

Sorry, the corruption is not showing up which I press the "Print Screen"
button. I shall attempt to describe instead:

Imagine moving towards a forest, with the trees in the centre of your screen.
As you approach the forest, you expect the trees to get larger and appear to
slide towards the left and right edges of your screen. (That's perfectly
ordinary depth-perception). The corruption seems to be that nothing is
immediately rendered where the trees used to be, leaving large black gaps. When
you stop moving, the black gaps are quickly filled again.

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[Bug 58033] [r300g] Black gap artifacts when playing WoW

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https://bugs.freedesktop.org/show_bug.cgi?id=58033

--- Comment #11 from Chris Rankin <rankincj@googlemail.com> ---
Created attachment 73347
  --> https://bugs.freedesktop.org/attachment.cgi?id=73347&action=edit
Screenshot of corruption in WoW

(In reply to comment #9)
> Could you please attach a screenshot showing the issue?

I've managed to capture a screenshot using GIMP instead of the Print Screen
button.

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[Bug 58033] [r300g] Black gap artifacts when playing WoW

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https://bugs.freedesktop.org/show_bug.cgi?id=58033

--- Comment #12 from Chris Rankin <rankincj@googlemail.com> ---
Created attachment 73348
  --> https://bugs.freedesktop.org/attachment.cgi?id=73348&action=edit
Screenshot of corruption in WoW

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[Bug 58033] [r300g] Black gap artifacts when playing WoW

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https://bugs.freedesktop.org/show_bug.cgi?id=58033

--- Comment #13 from Chris Rankin <rankincj@googlemail.com> ---
Created attachment 73349
  --> https://bugs.freedesktop.org/attachment.cgi?id=73349&action=edit
More corruption in WoW

Another screenshot, to give you a better idea.

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[Bug 58033] [r300g] Black gap artifacts when playing WoW

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https://bugs.freedesktop.org/show_bug.cgi?id=58033

Chris Rankin <rankincj@googlemail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
  Attachment #73348|image/png                   |image/jpeg
          mime type|                            |

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[Bug 58033] [r300g] Black gap artifacts when playing WoW

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https://bugs.freedesktop.org/show_bug.cgi?id=58033

--- Comment #14 from Chris Rankin <rankincj@googlemail.com> ---
Created attachment 73350
  --> https://bugs.freedesktop.org/attachment.cgi?id=73350&action=edit
Yet more corruption in WoW

All of these screenshots were taken while moving. The corruption disappears in
a stationary shot.

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[Bug 58033] [r300g][r600g] Black gap artifacts when playing WoW

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https://bugs.freedesktop.org/show_bug.cgi?id=58033

Chris Rankin <rankincj@googlemail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|[r300g] Black gap artifacts |[r300g][r600g] Black gap
                   |when playing WoW            |artifacts when playing WoW
          Component|Drivers/Gallium/r300        |Drivers/Gallium/r600

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[Bug 58033] [r300g][r600g] Black gap artifacts when playing WoW

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https://bugs.freedesktop.org/show_bug.cgi?id=58033

--- Comment #15 from Chris Rankin <rankincj@googlemail.com> ---
I've just upgraded one of my 32 bit boxes to Fedora 18, which has allowed me to
compile Mesa git here. And I can now report that the corruption happens with an
RV730 chip too.

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[Bug 58033] [r300g][r600g] Black gap artifacts when playing WoW

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https://bugs.freedesktop.org/show_bug.cgi?id=58033

--- Comment #16 from Chris Rankin <rankincj@googlemail.com> ---
My CAICOS (HD6450) is not affected by this bug (64 bit).

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[Bug 58033] [r300g][r600g] Black gap artifacts when playing WoW

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https://bugs.freedesktop.org/show_bug.cgi?id=58033

--- Comment #17 from Chris Rankin <rankincj@googlemail.com> ---
My RV790 (HD4890) is also unaffected by this bug. And this box is 64 bit too.
Could it just be a coincidence that both of my affected boxes are 32 bit?

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[Bug 58033] [r300g][r600g] Black gap artifacts when playing WoW

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https://bugs.freedesktop.org/show_bug.cgi?id=58033

--- Comment #18 from Chris Rankin <rankincj@googlemail.com> ---
This bug is still happening on my 32 bit T60p after #66921 has been fixed.

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[Bug 58033] [r300g][r600g] Black gap artifacts when playing WoW

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https://bugs.freedesktop.org/show_bug.cgi?id=58033

--- Comment #19 from Tomasz P. <son_of_the_osiris@interia.pl> ---
(In reply to comment #15)
> I've just upgraded one of my 32 bit boxes to Fedora 18, which has allowed me
> to compile Mesa git here. And I can now report that the corruption happens
> with an RV730 chip too.

This corruption appears with all shader backends (sb,llvm,sb+llvm) ?

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[Bug 58033] [r300g][r600g] Black gap artifacts when playing WoW

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https://bugs.freedesktop.org/show_bug.cgi?id=58033

--- Comment #20 from Chris Rankin <rankincj@googlemail.com> ---
(In reply to comment #19)
> This corruption appears with all shader backends (sb,llvm,sb+llvm) ?

Actually, the RV730 corruption has changed: instead of the "shadow-like"
artifacts, the window beneath the UI briefly turns completely black instead.
(Or sometime completely blue - I guess it depends on my location in the game).

This corruptions happens both with and without RADEON_DEBUG=nosb.

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https://bugs.freedesktop.org/show_bug.cgi?id=58033

GitLab Migration User <gitlab-migration@fdo.invalid> changed:

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

--- Comment #21 from GitLab Migration User <gitlab-migration@fdo.invalid> ---
-- GitLab Migration Automatic Message --

This bug has been migrated to freedesktop.org's GitLab instance and has been
closed from further activity.

You can subscribe and participate further through the new bug through this link
to our GitLab instance: https://gitlab.freedesktop.org/mesa/mesa/issues/427.

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