[Bug 110697] glXWaitForMscOML and glXWaitVideoSyncSGI may block indefinitely

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=110697

            Bug ID: 110697
           Summary: glXWaitForMscOML and glXWaitVideoSyncSGI may block
                    indefinitely
           Product: Mesa
           Version: 19.1
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: major
          Priority: medium
         Component: Drivers/DRI/i965
          Assignee: intel-3d-bugs at lists.freedesktop.org
          Reporter: acc12345acc at gmail.com
        QA Contact: intel-3d-bugs at lists.freedesktop.org

Under certain circumstances, using any of the aforementioned functions under an
Intel card may result in the application being blocked until killed.

The application in question is kwin-lowlatency
(https://github.com/tildearrow/kwin-lowlatency) which relies upon either
function for achieving its goal.

Related issue: https://github.com/tildearrow/kwin-lowlatency/issues/10

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