[Bug 87625] Radeon 7950 hangs for a bit when switching video to fullscreen mode in mplayer2

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=87625

            Bug ID: 87625
           Summary: Radeon 7950 hangs for a bit when switching video to
                    fullscreen mode in mplayer2
           Product: Mesa
           Version: 10.3
          Hardware: Other
                OS: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Drivers/Gallium/radeonsi
          Assignee: dri-devel at lists.freedesktop.org
          Reporter: luke-jr+freedesktopbugs at utopios.org

When I fullscreen a video in mplayer2 (gl3 vo driver), my display freezes -
usually for a number of seconds - after which the fullscreen completes
successfully and continues playing.

Sometimes the hang is very brief or even unnoticable (I think if I had recently
played a video fullscreen - which may make troubleshooting harder).

During the hang, CPU appears to be idle, I *think* I/O wait is high (but
nothing showed in iotop), and perf top didn't notice anything busy.

This does not affect my 5850 card, only the 7950.

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