[Bug 66558] New: RS690: 3D artifacts when playing SuperTuxKart

[Bug 66558] New: RS690: 3D artifacts when playing SuperTuxKart

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https://bugs.freedesktop.org/show_bug.cgi?id=66558

          Priority: medium
            Bug ID: 66558
          Assignee: dri-devel@lists.freedesktop.org
           Summary: RS690: 3D artifacts when playing SuperTuxKart
          Severity: normal
    Classification: Unclassified
                OS: Linux (All)
          Reporter: bjoern-beutel@arcor.de
          Hardware: x86-64 (AMD64)
            Status: NEW
           Version: git
         Component: Drivers/Gallium/r300
           Product: Mesa

Created attachment 81975
  --> https://bugs.freedesktop.org/attachment.cgi?id=81975&action=edit
Example of corruption in SuperTuxKart

Using the 300g driver from Mesa 9.1, the SuperTuxKart game sometimes shows
artifacts, as show in the attached example.

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[Bug 66558] RS690: 3D artifacts when playing SuperTuxKart

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https://bugs.freedesktop.org/show_bug.cgi?id=66558

--- Comment #1 from Björn Beutel <bjoern-beutel@arcor.de> ---
Created attachment 81978
  --> https://bugs.freedesktop.org/attachment.cgi?id=81978&action=edit
glxinfo output

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[Bug 66558] RS690: 3D artifacts when playing SuperTuxKart

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https://bugs.freedesktop.org/show_bug.cgi?id=66558

--- Comment #2 from Björn Beutel <bjoern-beutel@arcor.de> ---
Created attachment 81979
  --> https://bugs.freedesktop.org/attachment.cgi?id=81979&action=edit
dmesg output

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[Bug 66558] RS690: 3D artifacts when playing SuperTuxKart

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https://bugs.freedesktop.org/show_bug.cgi?id=66558

Alex Deucher <agd5f@yahoo.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
  Attachment #81975|text/plain                  |image/png
          mime type|                            |

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[Bug 66558] RS690: 3D artifacts when playing SuperTuxKart

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https://bugs.freedesktop.org/show_bug.cgi?id=66558

--- Comment #3 from Alex Deucher <agd5f@yahoo.com> ---
Is this a regression?  If so, can you bisect?

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[Bug 66558] RS690: 3D artifacts when playing SuperTuxKart

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https://bugs.freedesktop.org/show_bug.cgi?id=66558

--- Comment #4 from Björn Beutel <bjoern-beutel@arcor.de> ---
Created attachment 81980
  --> https://bugs.freedesktop.org/attachment.cgi?id=81980&action=edit
Patch that sets the needed CS buffer size in "r300_render_draw_elements"

The attached patch solves the problem for me in Mesa 9.1 and Mesa Git.

For me, it seems as if the buffer is not always properly flushed in between
when "r300_render_draw_elements" has to divide it into two or more runs.

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[Bug 66558] RS690: 3D artifacts when playing SuperTuxKart

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https://bugs.freedesktop.org/show_bug.cgi?id=66558

--- Comment #5 from Björn Beutel <bjoern-beutel@arcor.de> ---
@Alex Deucher: 

AFAIK, that bug has been in r300g from its very beginnings (in contrast to
r300c).

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[Bug 66558] RS690: 3D artifacts when playing SuperTuxKart

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https://bugs.freedesktop.org/show_bug.cgi?id=66558

Björn Beutel <bjoern-beutel@arcor.de> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Assignee|dri-devel@lists.freedesktop |mesa-dev@lists.freedesktop.
                   |.org                        |org

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