[Bug 68585] New: Recent Mesa git make Kwin crash with AMD R300g driver

[Bug 68585] New: Recent Mesa git make Kwin crash with AMD R300g driver

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https://bugs.freedesktop.org/show_bug.cgi?id=68585

          Priority: medium
            Bug ID: 68585
          Assignee: dri-devel@lists.freedesktop.org
           Summary: Recent Mesa git make Kwin crash with AMD R300g driver
          Severity: normal
    Classification: Unclassified
                OS: Linux (All)
          Reporter: rvdb@cryptolab.net
          Hardware: x86-64 (AMD64)
            Status: NEW
           Version: git
         Component: Drivers/Gallium/r300
           Product: Mesa

Created attachment 84671
  --> https://bugs.freedesktop.org/attachment.cgi?id=84671&action=edit
Kwin backtrace

I run Slackware64-current systems on several workstations using AMD processors
and graphic cards. I usually compile my own very recent kernels (currently
3.11-rc*) and I regularly (about once every two weeks) compile git version of
libdrm, mesa and xf86-video-ati.
I noticed that with recent versions of mesa, kwin, KDE's compositor and windows
manager, crashed immediately at boot and only worked when I disabled the OpenGL
effects. The last version of mesa that worked was of the 2013/08/08. By just
changing mesa to a more recent version, kwin would segfault, for the first time
in years, with KDE 4.10.5 as well as 4.11.
My other systems, which have a fairly similar OS settings, do not have these
issues but they use the r600g driver while my old laptop, the one which crash,
still use r300g.
I've attached to this kwin backtrace which clearly shows that kwin crash while
working with r300_dri.so, as well as the startx output.
I don't have debug binaries unfortunately.

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[Bug 68585] Recent Mesa git make Kwin crash with AMD R300g driver

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https://bugs.freedesktop.org/show_bug.cgi?id=68585

--- Comment #1 from Richard Van Den Boom <rvdb@cryptolab.net> ---
Created attachment 84672
  --> https://bugs.freedesktop.org/attachment.cgi?id=84672&action=edit
Startx output

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[Bug 68585] Recent Mesa git make Kwin crash with AMD R300g driver

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https://bugs.freedesktop.org/show_bug.cgi?id=68585

--- Comment #2 from Alex Deucher <agd5f@yahoo.com> ---
Can you bisect?

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[Bug 68585] Recent Mesa git make Kwin crash with AMD R300g driver

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https://bugs.freedesktop.org/show_bug.cgi?id=68585

--- Comment #3 from Richard Van Den Boom <rvdb@cryptolab.net> ---
I'm no git expert but this seems simple enough.
It may take a bit of time though as this is a slow laptop (8 years old).

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[Bug 68585] Recent Mesa git make Kwin crash with AMD R300g driver

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https://bugs.freedesktop.org/show_bug.cgi?id=68585

--- Comment #4 from Richard Van Den Boom <rvdb@cryptolab.net> ---
According to bisect, the commit that cause the crashes is this one :

git bisect good 98d2498404ba69a3efc1c765b1a1885d151181ed
# first bad commit: [a3ae5dc7dd5c2f8893f86a920247e690e550ebd4] draw: make sure
that the stages setup outputs

I've attached the full git bisect log output.
Whatever Kwin does in the R300 driver, the above commit seems to trigger an
issue.

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[Bug 68585] Recent Mesa git make Kwin crash with AMD R300g driver

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https://bugs.freedesktop.org/show_bug.cgi?id=68585

--- Comment #5 from Richard Van Den Boom <rvdb@cryptolab.net> ---
Created attachment 84696
  --> https://bugs.freedesktop.org/attachment.cgi?id=84696&action=edit
Git bisect log output

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[Bug 68585] Recent Mesa git make Kwin crash with AMD R300g driver

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https://bugs.freedesktop.org/show_bug.cgi?id=68585

--- Comment #6 from Marek Olšák <maraeo@gmail.com> ---
Created attachment 84748
  --> https://bugs.freedesktop.org/attachment.cgi?id=84748&action=edit
possible fix

Could you please test this patch?

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[Bug 68585] Recent Mesa git make Kwin crash with AMD R300g driver

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https://bugs.freedesktop.org/show_bug.cgi?id=68585

--- Comment #7 from Richard Van Den Boom <rvdb@cryptolab.net> ---
I'll see what I can do.

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[Bug 68585] Recent Mesa git make Kwin crash with AMD R300g driver

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https://bugs.freedesktop.org/show_bug.cgi?id=68585

--- Comment #8 from Richard Van Den Boom <rvdb@cryptolab.net> ---
I did a git pull to be as possible up to date and applied the patch.
It does indeed seem to fix Kwin crash at startup.
Congratulations!

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[Bug 68585] Recent Mesa git make Kwin crash with AMD R300g driver

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https://bugs.freedesktop.org/show_bug.cgi?id=68585

--- Comment #9 from Richard Van Den Boom <rvdb@cryptolab.net> ---
As far as I'm conceredn this bug can be closed as fixed.

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[Bug 68585] Recent Mesa git make Kwin crash with AMD R300g driver

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https://bugs.freedesktop.org/show_bug.cgi?id=68585

Alex Deucher <agd5f@yahoo.com> changed:

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

--- Comment #10 from Alex Deucher <agd5f@yahoo.com> ---
fixed in:
http://cgit.freedesktop.org/mesa/mesa/commit/?id=89a665eb5fa176f68223bf54a472d6a0567c3546

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