[Bug 99107] New: Screen+Keyboard hangup after playing a certain file on VLC

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=99107

            Bug ID: 99107
           Summary: Screen+Keyboard hangup after playing a certain file on
                    VLC
           Product: xorg
           Version: unspecified
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Driver/intel
          Assignee: chris at chris-wilson.co.uk
          Reporter: shlomif at shlomifish.org
        QA Contact: intel-gfx-bugs at lists.freedesktop.org

Created attachment 128498
  --> https://bugs.freedesktop.org/attachment.cgi?id=128498&action=edit
some output/debug files.

My Mageia v6 x86-64 system's keyboard and screen are freezing after I play
this file in VLC player (including on startx using JWM in a new user):

http://www.shlomifish.org/Files/files/video/yay-ponies--YP-7R-06x12--vlc-causing-hang--first3M.mkv

Here are its specs:

    An Intel Core i3 CPU (x86-64).
    8 GB of RAM.
    Intel Corporation Sandy Bridge Integrated Graphics Controller (rev 09)
    A 2 TB hard-disk.
    A 21″ Wide LCD Screen by LG.
    Intel Corporation Cougar Point High Definition Audio Controller.
    Intel Corporation 82579V Gigabit Network Connection.

ssh to it still works. chvt doesn't work.

"systemctl start lightdm.service" as root doesn't reset the screen.
htop shows that 4GB out of 7.71G are occupied but there are no large MEM%
processes. 

The attached .zip contains the output of some commands as requested on
#intel-gfx on freenode. Note that «cat
/sys/kernel/debug/dri/0/i915_gem_objects» just hangs. Playing the file with mpv
works fine.

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