[Bug 28114] New: Full screen video playback choppy after git commit 78e7047c

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=28114

           Summary: Full screen video playback choppy after git commit
                    78e7047c
           Product: xorg
           Version: 7.5
          Platform: x86 (IA32)
        OS/Version: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Driver/Radeon
        AssignedTo: xorg-driver-ati at lists.x.org
        ReportedBy: attila123456 at gmail.com
         QAContact: xorg-team at lists.x.org


After upgrading my ubuntu to lucid I noticed that some videos didn't play well
on full screen anymore, it's slow and choppy. 720p movies play fine, but a
simple 512x336 one doesn't. CPU usage is minimal.

Tried a git bisect on the radeon driver and found that the issue seems to be
caused by the above commit ('Allocate Xv buffers to GTT'). Reverting that one
on the master branch results in smooth playback.

Dell laptop, mobility X1300 card, Core2Duo CPU. Same on kernels 2.6.32,33 & 34.
Problem persists after an update from the xorg-edgers PPA too.

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