[Bug 36065] New: r600g regression : vertex buffer alignement

[Bug 36065] New: r600g regression : vertex buffer alignement

[bugzilla-daemon]

https://bugs.freedesktop.org/show_bug.cgi?id=36065

           Summary: r600g regression : vertex buffer alignement
           Product: DRI
           Version: XOrg CVS
          Platform: x86-64 (AMD64)
        OS/Version: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/Radeon
        AssignedTo: dri-devel@lists.freedesktop.org
        ReportedBy: pelloux@gmail.com


I have a simple app using vbo to render models.
The VBO layout is : position (3 float), normal (3 float), color (3 char)

This app was running perfectly until I updated libdrm/mesa to git version.
Now the app still does not have any GL error set (checked with glGetError()),
but its rendering is completely wrong.

git-bisect pointed me to this commit :
  0ed5bf668db24fb56b5b359399099c89531e2a0a
  "r600g: Request DWORD aligned vertex buffers."


OS : Debian unstable (amd64)
Radeon HD 4850

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[Bug 36065] r600g regression : vertex buffer alignement

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https://bugs.freedesktop.org/show_bug.cgi?id=36065

--- Comment #1 from pelloux@gmail.com 2011-04-08 05:02:00 PDT ---
Here's a few more information, hoping it could help :

>From Xorg.0.log :
[KMS] Kernel modesetting enabled.

>From glxinfo :
EE r600_pipe.c:430 r600_get_param - r600: unknown param 45
name of display: :0
[...]
direct rendering: Yes
OpenGL renderer string: Gallium 0.4 on AMD RV770

>From lscpci -v :
VGA compatible controller: ATI Technologies Inc RV770 [Radeon HD 4850] (prog-if
00 [VGA controller])
(PCI-E)

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[Bug 36065] r600g regression : vertex buffer alignement

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https://bugs.freedesktop.org/show_bug.cgi?id=36065

--- Comment #2 from pelloux@gmail.com 2011-04-08 05:03:43 PDT ---
Created an attachment (id=45415)
 --> (https://bugs.freedesktop.org/attachment.cgi?id=45415)
Wrong/Correct rendering

On the left : rendering using mesa including the mention commit
On the right : rendering using older mesa OR LIBGL_ALWAYS_SOFTWARE=1

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[Bug 36065] r600g regression : vertex buffer alignement

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https://bugs.freedesktop.org/show_bug.cgi?id=36065

--- Comment #3 from Alex Deucher <agd5f@yahoo.com> 2011-04-08 07:42:37 PDT ---
Can you attach the source to your test app?

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[Bug 36065] r600g regression : vertex buffer alignement

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https://bugs.freedesktop.org/show_bug.cgi?id=36065

--- Comment #4 from Alex Deucher <agd5f@yahoo.com> 2011-04-08 07:43:31 PDT ---
Or find a simple mesa demo or piglit test that exhibits the same issue?

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[Bug 36065] r600g regression : vertex buffer alignement

[bugzilla-daemon]

https://bugs.freedesktop.org/show_bug.cgi?id=36065

--- Comment #5 from pelloux@gmail.com 2011-04-08 08:44:47 PDT ---
Created an attachment (id=45424)
 --> (https://bugs.freedesktop.org/attachment.cgi?id=45424)
sample app that reproduces the issue

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[Bug 36065] r600g regression : vertex buffer alignement

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https://bugs.freedesktop.org/show_bug.cgi?id=36065

Marek Olšák <maraeo@gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Product|DRI                         |Mesa
            Version|XOrg CVS                    |git
          Component|DRM/Radeon                  |Drivers/Gallium/r600

--- Comment #6 from Marek Olšák <maraeo@gmail.com> 2011-04-08 09:48:55 PDT ---
Both r300g and r600g are affected. I am working on the fix.

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[Bug 36065] r600g regression : vertex buffer alignement

[bugzilla-daemon]

https://bugs.freedesktop.org/show_bug.cgi?id=36065

Marek Olšák <maraeo@gmail.com> changed:

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

--- Comment #7 from Marek Olšák <maraeo@gmail.com> 2011-04-08 10:36:01 PDT ---
Fixed with commit a0d154dc1385d92a31dca8e65e50d958bdf6d532. Closing.

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