[Bug 23322] Small resolution video tearing problem with open source radeon drivers

bugzilla-daemon at freedesktop.org bugzilla-daemon at freedesktop.org
Sun Aug 23 04:13:43 PDT 2009


--- Comment #4 from Michel Dänzer <michel at daenzer.net>  2009-08-23 04:13:43 PST ---
Created an attachment (id=28864)
 --> (http://bugs.freedesktop.org/attachment.cgi?id=28864)
Possible fix

(In reply to comment #1)
> 'Tearing' is a term which refers to non-smooth animation due to parts of
> several source frames being visible in a single output frame, which isn't what
> this is about.

Actually I misinterpreted the problem - it does look like tearing. This
probably means one of two things:

* The textured video blit takes too long to finish before the next output frame
  is scanned out.


* The textured video blit doesn't finish before the next source frame is
  uploaded to VRAM.

If it's the first case, it boils down to 'the GPU is too slow to handle bicubic
filtering without tearing, you need to disable it'.

If it's the second case though, this patch may fix the tearing, though it may
introduce frame skips instead.

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