[Bug 101254] New: VDPAU videos take forever to start in different applications

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=101254

            Bug ID: 101254
           Summary: VDPAU videos take forever to start in different
                    applications
           Product: xorg
           Version: git
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Driver/Radeon
          Assignee: xorg-driver-ati at lists.x.org
          Reporter: joeri.exelmans at gmail.com
        QA Contact: xorg-team at lists.x.org

Created attachment 131606
  --> https://bugs.freedesktop.org/attachment.cgi?id=131606&action=edit
mpv verbose output till the point where the application becomes unresponsive

Hardware: AMD Fusion E-450 (PALM)
Driver version (xf86-video-ati): 1:7.9.99+git1705240733.d80d01~gd~x

Playing a video in mpv with the '--hwdec=vdpau' option, the player window is
created but the application becomes unresponsive and the video never starts.
Similarly in Kodi, playing a video with VDPAU enabled causes Kodi to become
unresponsive to user input and the video never starts.

Strangely, VLC can still play videos with VDPAU enabled.

I'm automatically getting the latest git updates through the Oibaf Ubuntu PPA.
The problem first occurred somewhere in March or April, when VDPAU videos
/sometimes/ wouldn't start or took a long time to start (as opposed to the
current situation where videos no longer start at all) and going back to the
much older Ubuntu 'stock' driver solves the problem.

I'm not sure if it's a bug in the xf86-video-ati driver or some other
component. If someone can tell me which component is likely to cause the
problem, I can track the git commit that started the problem.

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