Nouveau - Jan 2011 - [Bug 32933] New: Screen corruption with drm-nouveau-next

https://bugs.freedesktop.org/show_bug.cgi?id=32933

           Summary: Screen corruption with drm-nouveau-next
           Product: xorg
           Version: unspecified
          Platform: x86-64 (AMD64)
        OS/Version: Linux (All)
            Status: NEW
          Severity: major
          Priority: medium
         Component: Driver/nouveau
        AssignedTo: nouveau at lists.freedesktop.org
        ReportedBy: dev at lynxeye.de
         QAContact: xorg-team at lists.x.org


Created an attachment (id=41786)
 --> (https://bugs.freedesktop.org/attachment.cgi?id=41786)
Example of screen corruption

If I use drm-nouveau-next instead of master I get massive screen corruption
after some minutes working with X. The corruption never appears directly after
starting X, it takes several minutes to show up.

Restarting X hides the problem for a few minutes before the corruption
reappears.

DDX and libdrm are from git as of 08-Jan-2011.

I tried to use "EXAOptimizeMigration" "off" in xorg.conf,
but this has no
effect.

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https://bugs.freedesktop.org/show_bug.cgi?id=32933

--- Comment #1 from Lucas Stach <dev at lynxeye.de> 2011-01-09 03:09:41
PST ---
Forget to mention:
Xorg-server is 7.4 from Fedora 14 stock
graphics adapter is nvA0

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https://bugs.freedesktop.org/show_bug.cgi?id=32933

--- Comment #2 from Ben Skeggs <skeggsb at gmail.com> 2011-01-09 03:35:57
PST ---
Can you post dmesg please. Also, any chance of finding which commit is
responsible. Thanks :)

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https://bugs.freedesktop.org/show_bug.cgi?id=32933

--- Comment #3 from Lucas Stach <dev at lynxeye.de> 2011-01-09 09:23:59
PST ---
Logs do not contain anything interesting.

But I bisected the issue today. It seems the problematic commit is
5f6fdca570b13a8a2c9cab9ab6edfc17487049cf

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https://bugs.freedesktop.org/show_bug.cgi?id=32933

--- Comment #4 from Ben Skeggs <skeggsb at gmail.com> 2011-01-15 01:52:27
PST ---
Can you try drm-nouveau-staging, there's a fix to nouveau_mm.c that appears
to
fix the issues I seen on my NVA0.

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Lucas Stach <dev at lynxeye.de> changed:

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

--- Comment #5 from Lucas Stach <dev at lynxeye.de> 2011-01-23 08:40:15
PST ---
Yes, code from drm-nouveau-staging seems to fix it. I used this for several
hours now and haven't seen any corruption.

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