[Nouveau] [Bug 16490] New: Xv overlay tearing

[bugzilla-daemon at freedesktop.org]

http://bugs.freedesktop.org/show_bug.cgi?id=16490

           Summary: Xv overlay tearing
           Product: xorg
           Version: git
          Platform: x86-64 (AMD64)
        OS/Version: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Driver/nouveau
        AssignedTo: nouveau at lists.freedesktop.org
        ReportedBy: pq at iki.fi
         QAContact: xorg-team at lists.x.org


While investigating the Xv overlay & blitter issue with the X-server backing
store, I found the real overlay jerky and tearing.

I have to disable the Composite extension of the X-server to get the real
overlay adapter. Otherwise, due to the backing store issue, it falls back to
blitter (which I hear is then still drawing the colorkey when it should not,
but that's another issue). If Composite extension is enabled, blitter and
overlay adapters are identical with mplayer, producing a static horizontal tear
line (bug #16231).

Having Composite disabled, the blitter seems to work fine. Overlay looks jerky
and occasionally tears at random places, it looks mostly horizontal tear lines,
but they blink too fast to see clearly. It might also be blocky instead of just
a line.

Practically my whole graphics stack is from git, around 20th-22nd June.
The card is nv20, a Geforce 3.


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