Nouveau - Jun 2008 - [Bug 16490] New: Xv overlay tearing

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





--- Comment #1 from Danny <obiwan at mailmij.org>  2008-07-03 21:12:05 PST
---
Just adding that I do not experience this tearing without composite on my nv34.


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--- Comment #2 from Pekka Paalanen <pq at iki.fi>  2008-07-04 00:17:59 PST
---
Not all videos exhibit the problem. Several 768x576 sized videos do not have
problem, but 1024x576 does. I thought the scaling factor would also affect, but
it might be an illusion: problems are better visible in a bigger view.
Enlarged, native size, or shrunk, makes probably no difference. I'm not so
sure
it's random, either, but I'm not near the computer to test.


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Pekka Paalanen <pq at iki.fi> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|                            |WORKSFORME




--- Comment #3 from Pekka Paalanen <pq at iki.fi>  2009-08-08 03:22:38 PST
---
Closing as a very old report. If tearing somewhere still appears, I'll file
a
new bug or reopen this one. Current status is unknown.


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