[Bug 91221] UVD: GPU lockup with BARTS

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=91221

            Bug ID: 91221
           Summary: UVD: GPU lockup with BARTS
           Product: DRI
           Version: XOrg git
          Hardware: All
                OS: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/Radeon
          Assignee: dri-devel at lists.freedesktop.org
          Reporter: chithanh at gentoo.org

Created attachment 116935
  --> https://bugs.freedesktop.org/attachment.cgi?id=116935&action=edit
dmesg with drm.debug=14

When playing back a video using VDPAU and UVD it first plays fine, but the X
Server reproducibly hangs after a few minutes. Audio will continue to play, but
no screen updates will happen any more, nor is there any reaction to keyboard
input. I have to use Magic SysRq to switch to the console and kill the X
server. From that point on no acceleration will work, and the video card fan
gets audibly louder, until the system is rebooted.

When using Xv and no hardware decode acceleration, the video plays back fine.

This is using Linux kernel 4.1.1 and Mesa 10.3.7.
Hardware is 

In dmesg, messages like 

[ 1406.489288] radeon 0000:01:00.0: GPU lockup (current fence id
0x0000000000031828 last fence id 0x000000000003182a on ring 0)
[ 1406.919692] [drm:rv770_stop_dpm] *ERROR* Could not force DPM to low.
[ 1407.091325] radeon 0000:01:00.0: couldn't schedule ib
[ 1407.091329] [drm:radeon_uvd_suspend] *ERROR* Error destroying UVD (-22)!

are shown. Nothing unusual in the Xorg.0.log.

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