[Bug 111813] Ubuntu 18.04.3 + Mesa 19.3 = Login Loop

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=111813

            Bug ID: 111813
           Summary: Ubuntu 18.04.3 + Mesa 19.3 = Login Loop
           Product: Mesa
           Version: git
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: not set
         Component: Drivers/Gallium/radeonsi
          Assignee: dri-devel at lists.freedesktop.org
          Reporter: DirkToewe at GoogleMail.com
        QA Contact: dri-devel at lists.freedesktop.org

Description
-----------
As of today with Oibaf's latest PPA update (19.3~git1909250730.88f909~oibaf~b),
Ubuntu 18.04.3 is stuck in a login loop, i.e. after entering the password the
desktop background is displayed for a second and then Gnome goes back to the
login screen. According to /var/log/syslog, there are segementation faults
happening when Gnome tries to access GLX.

Sep 25 09:07:58 kernel: [   10.405287] gnome-shell[1073]: segfault at 50 ip
00007f1d58939291 sp 00007ffe73daced0 error 4 in
libGLX_mesa.so.0.0.0[7f1d588f0000+73000]
Sep 25 09:07:59 kernel: [   12.097378] gnome-shell[1323]: segfault at 50 ip
00007f3c427b1291 sp 00007ffef7af4e50 error 4 in
libGLX_mesa.so.0.0.0[7f3c42768000+73000]

After reverting to the official Ubuntu repositories using PPA-Purge, the login
works just fine. My experience with (debugging) native binaries let alone
drivers is quite limited. Please let me know what else I can do to provide more
info if needed.

Hardware
--------
AMD A10-7850K APU (Kaveri)

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