[Mesa-dev] [Bug 31579] New: [swrast] segfault when login with kdm

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=31579

           Summary: [swrast] segfault when login with kdm
           Product: Mesa
           Version: git
          Platform: x86-64 (AMD64)
        OS/Version: Linux (All)
            Status: NEW
          Severity: blocker
          Priority: medium
         Component: Other
        AssignedTo: mesa-dev at lists.freedesktop.org
        ReportedBy: thcourbon at gmail.com


I tried to upgrade my mesa package to 7.9, upon rebooting I wasn't able to log
into my KDE session, each time I typed my password the login prompt was
displayed again after a short time and some flicker. This happened every
reboot. I downgraded packages and narrowed the problem as part of the libgl
7.8.2 -> 7.9 upgrade.

The problem is still present with git version. I bisected the issue to the
following commit :
commit 8d789be03430b80e0ba2fef19d56dd0b8e699ea2
Author: Dave Airlie <airlied at redhat.com>
Date:   Sun May 23 22:10:04 2010 +1000

Archlinux PKGBULD, Xorg.0.log and commit attached.

My system run a HD5770 graphics card and swrast is used (I was trying to make
the radeon driver to work when I came accross the issue) :

[thomas at sherwood ~]$ glxinfo | grep -i opengl
OpenGL vendor string: Mesa Project
OpenGL renderer string: Software Rasterizer
OpenGL version string: 2.1 Mesa 7.8.3
OpenGL shading language version string: 1.20

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