[Bug 57027] New: Hanging videos (Xvideo + KMS)

bugzilla-daemon at freedesktop.org bugzilla-daemon at freedesktop.org
Mon Nov 12 11:04:18 PST 2012


          Priority: medium
            Bug ID: 57027
          Assignee: xorg-driver-ati at lists.x.org
           Summary: Hanging videos (Xvideo + KMS)
        QA Contact: xorg-team at lists.x.org
          Severity: normal
    Classification: Unclassified
                OS: Linux (All)
          Reporter: navaj072-info at yahoo.de
          Hardware: x86-64 (AMD64)
            Status: NEW
           Version: unspecified
         Component: Driver/Radeon
           Product: xorg

Created attachment 69956
  --> https://bugs.freedesktop.org/attachment.cgi?id=69956&action=edit
Xorg log with KMS enabled

I am having a problem with video playback on Ubuntu 12.04. When I try to play a
video with resolution 640x480 (or similar) it either hangs or flickers like
hell (depends on the player I use, VLC hangs).
All players are using the Xvideo extension for output by default, but this
seems to have a problem. The playback gets better when I configure the players
to use x11 output instead (some frames are dropped though, because I have a
slow CPU).
But if I boot with "nomodeset", which disables KMS, I can use the Xvideo
output, the playback works smoothly then. So I assume there is a bug somewhere
in the combination of Xvideo + KMS + radeon driver (at least for my hardware).

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