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

[bugzilla-daemon at freedesktop.org]

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

          Priority: medium
            Bug ID: 68585
          Assignee: dri-devel at lists.freedesktop.org
           Summary: Recent Mesa git make Kwin crash with AMD R300g driver
          Severity: normal
    Classification: Unclassified
                OS: Linux (All)
          Reporter: rvdb at 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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