[Bug 39557] New: Intermittent segmentation fault on locking screen

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=39557

           Summary: Intermittent segmentation fault on locking screen
           Product: xorg
           Version: 7.6
          Platform: x86-64 (AMD64)
        OS/Version: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Driver/Radeon
        AssignedTo: xorg-driver-ati at lists.x.org
        ReportedBy: kromagg at gmail.com
         QAContact: xorg-team at lists.x.org


Created an attachment (id=49578)
 --> (https://bugs.freedesktop.org/attachment.cgi?id=49578)
X.org server log

Sometimes when locking my screen manually, X.org simply crashes with a
segmentation fault in the log (attached). I think this occurs shortly after
pressing lock screen but not immediately, since I usually only notice when I
get back. I'm running a dual-head radeon setup.

The only relevant lines I could find were the stack with the segmentation fault
and several lines preceding it about a busy resource:

[1543050.722] (WW) RADEON(0): divisor 0 get vblank counter failed: Device or
resource busy
[1543050.747] (WW) RADEON(0): divisor 0 get vblank counter failed: Device or
resource busy
[1543050.752] (WW) RADEON(0): divisor 0 get vblank counter failed: Device or
resource busy

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