[Bug 26076] New: Transparent GNOME panel corruption on R600 KMS

[Bug 26076] New: Transparent GNOME panel corruption on R600 KMS

[bugzilla-daemon]

http://bugs.freedesktop.org/show_bug.cgi?id=26076

           Summary: Transparent GNOME panel corruption on R600 KMS
           Product: DRI
           Version: DRI CVS
          Platform: x86-64 (AMD64)
        OS/Version: Linux (All)
            Status: NEW
          Severity: minor
          Priority: medium
         Component: DRM/Radeon
        AssignedTo: dri-devel@lists.sourceforge.net
        ReportedBy: pseudomatty@mailinator.com


R600, using today's git HEAD of x.org, DRI, radeon etc on kernel 2.6.33rc4-git2
with KMS enabled.

The areas of my GNOME panel which are normally transparent are drawn mostly
black, with small amounts of apparently random garbage in them.


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[Bug 26076] Transparent GNOME panel corruption on R600 KMS

[bugzilla-daemon]

http://bugs.freedesktop.org/show_bug.cgi?id=26076





--- Comment #1 from matty <pseudomatty@mailinator.com>  2010-01-16 06:30:49 PST ---
Created an attachment (id=32667)
 --> (http://bugs.freedesktop.org/attachment.cgi?id=32667)
Xorg log

X.org log with KMS enabled that leads to corruption of transparent objects.


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[Bug 26076] Transparent GNOME panel corruption on R600 KMS

[bugzilla-daemon]

http://bugs.freedesktop.org/show_bug.cgi?id=26076





--- Comment #2 from Maarten Maathuis <madman2003@gmail.com>  2010-01-16 09:27:19 PST ---
This is probably a xserver bug, an exa bug to specific.


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[Bug 26076] Transparent GNOME panel corruption on R600 KMS

[bugzilla-daemon]

http://bugs.freedesktop.org/show_bug.cgi?id=26076





--- Comment #3 from matty <pseudomatty@mailinator.com>  2010-01-16 15:46:58 PST ---
Correction: the panel is semi-transparent when it works - not fully
transparent. Ie it's alpha blending, rather than just not drawing parts of the
panel.

Semi-transparent (alpha blended) GNOME Terminal windows are drawn correctly
both with and without KMS.
I expected they would work or fail identically to the transparent panel.
Is there some interesting difference between these two cases?

Sorry, I'm still not sure which component to select here. Perhaps someone else
could re-assign?

I've built everything correctly from git. I'm a C programmer, but I've little
experience with X development.
If someone gave me some guidance as to the structure of the relevant code, I
might be able to debug this myself.
In the meantime I'm going to go study the EXA source and try and figure it out
for myself.


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[Bug 26076] Transparent GNOME panel corruption on R600 KMS

[bugzilla-daemon]

http://bugs.freedesktop.org/show_bug.cgi?id=26076


Maarten Maathuis <madman2003@gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
          Component|DRM/Radeon                  |Acceleration/EXA
            Product|DRI                         |xorg
            Version|DRI CVS                     |git




--- Comment #4 from Maarten Maathuis <madman2003@gmail.com>  2010-01-16 16:24:45 PST ---
I'll attempt to reassign :-)


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[Bug 26076] Transparent GNOME panel corruption on R600 KMS

[bugzilla-daemon]

http://bugs.freedesktop.org/show_bug.cgi?id=26076





--- Comment #5 from Maarten Maathuis <madman2003@gmail.com>  2010-01-16 16:28:00 PST ---
As far as i know the problem originates here:
http://cgit.freedesktop.org/xorg/xserver/tree/exa/exa_accel.c#n475

This srcregion is used for migration optimization and is somehow incorrect or
triggering a bug elsewhere. This happens to be the only case where a src region
is passed. You can try setting to NULL to confirm it's the same bug.

I've looked at it, but i'm puzzled what exactly is wrong. I just wanted to say
this isn't really a dri bug.


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[Bug 26076] Transparent GNOME panel corruption on R600 KMS

[bugzilla-daemon]

http://bugs.freedesktop.org/show_bug.cgi?id=26076


Maarten Maathuis <madman2003@gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         AssignedTo|dri-                        |xorg-team@lists.x.org
                   |devel@lists.sourceforge.net |
          QAContact|                            |xorg-team@lists.x.org




--- Comment #6 from Maarten Maathuis <madman2003@gmail.com>  2010-01-16 16:28:42 PST ---
Forgot to reassign to default.


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