[Bug 92018] DMPS blanking breaks Intel TearFree

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=92018

            Bug ID: 92018
           Summary: DMPS blanking breaks Intel TearFree
           Product: Mesa
           Version: unspecified
          Hardware: All
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Drivers/DRI/i965
          Assignee: idr at freedesktop.org
          Reporter: dasnegro at yopmail.com
        QA Contact: intel-3d-bugs at lists.freedesktop.org

Hey guys

When recovering from DPMS screen blanking, TearFree in my xorg configuration
doesn't seem to have any effect anymore. 

xf86-video-intel = 2.99.917+381+g5772556-1 on Haswell refresh
mesa = 10.6.7

How to reproduce

1. Enable TearFree:
https://wiki.archlinux.org/index.php/Intel_graphics#Tear-free_video
2. Restart X and enjoy no tearing
3. Run: xset dpms force off
4. Resume from blanking
5. Enjoy your broken TearFree/tearing

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