[Bug 78641] New: Radeon makes Flash player with VDPAU enabled hang at vlVdpDecoderDestroy → flush → radeon_drm_ws_queue_cs

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=78641

          Priority: medium
            Bug ID: 78641
          Assignee: dri-devel at lists.freedesktop.org
           Summary: Radeon makes Flash player with VDPAU enabled hang at
                    vlVdpDecoderDestroy → flush → radeon_drm_ws_queue_cs
          Severity: normal
    Classification: Unclassified
                OS: All
          Reporter: mail at 3v1n0.net
          Hardware: Other
            Status: NEW
           Version: 10.1
         Component: Drivers/Gallium/r600
           Product: Mesa

Created attachment 98951
  --> https://bugs.freedesktop.org/attachment.cgi?id=98951&action=edit
Radeon deadlock with Flash + VDPAU

1) Enable VDPAU support in flash player [1]
2) Visit web pages such as [2] (in that page the hang happens
   when the AD has been played and the actual video should start).

At this point the flash player hangs (plugin-container process with firefox),
and there's no way to resume it other than killing the parent process.

It seems like a deadlock, see the attached backtrace; not sure if this has
something in common with Bug 70123.
This is when using mesa 10.1 (4a86465) in Ubuntu 14.04.

[1] echo -e "EnableLinuxHWVideoDecode = 1\nOverrideGPUValidation = 1" >>
/etc/adobe/mms.cfg
[2]
http://video.corriere.it/i-ragazzi-anni-90-come-eravamo/9fd1a13c-d9b5-11e3-8b8a-dcb35a431922

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