[Bug 31681] New: Evergreen: Xv image corruption when scaling to "fullscreen"

bugzilla-daemon at freedesktop.org bugzilla-daemon at freedesktop.org
Wed Nov 17 06:45:56 PST 2010


           Summary: Evergreen: Xv image corruption when scaling to
           Product: xorg
           Version: git
          Platform: x86-64 (AMD64)
        OS/Version: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Driver/Radeon
        AssignedTo: xorg-driver-ati at lists.x.org
        ReportedBy: crazy-ivanovic at gmx.net
         QAContact: xorg-team at lists.x.org

Ever since switching my rv670 based HD3850 to a Cypress based HD5850 I do get
some image corruption when scaling my self recorded (using mencoder and later
on avidemux for removing ads) analog TV data to view it at fullscreen (eg
scaling to video from 704x428 to 1920x1200, keeping the aspect ratio) I got
some "wrong colored stripes" in the bottom third. I will try to attach a short
part of a video that does show the issue in a rather extreme fashion. You will
see several red/pink as well as some (not as visible) greenish stripes if you
are able to reproduce it. I assume that it somehow has to do with upscaling the
noise in the video...

In general this does *only* happen using Xv. When selecting OpenGL as output
this does not happen. It makes no difference if I select r600c or r600g as mesa
potion. This issue was not happening with RV670 either. The issue does occur
with both, kaffeine (using the Xine backend) as well as smplayer.

My software stack:
(vanilla) kernel 2.6.36 (amd64)
libdrm / mesa / xf86-video-ati from git master
Xorg server 1.9.x (will attach Xorg.0.log!) as of "gentoo linux amd64 unstable"

My hardware:
HD6850 1024MB
Phenom II X6
4096MB ram

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