Bug#848575: xserver-xorg-video-radeon: unable to restart Xorg without rebooting (radeon)

Michel Dänzer michel at daenzer.net
Mon Dec 19 02:40:44 UTC 2016

On 18/12/16 10:48 PM, Arthur Marsh wrote:
> Package: xserver-xorg-video-radeon
> Version: 1:7.8.0-1+b1
> Severity: important
> Dear Maintainer,
> *** Reporter, please consider answering these questions, where appropriate ***
>    * What led up to the situation?
> After not upgrading packages in over 10 days, I found that sometimes
> video playback locked up, windows failed to refresh unless I switched to
> vt1 and back to vt7 and in fact that I could not restart Xorg (using lxdm)
> without rebooting the machine.

We have to be careful not to conflate multiple issues here. There are at
least two issues:

Video playback hangs the GPU. Most likely a Mesa issue.

Xorg cannot be restarted after that (you reported this upstream at
https://bugs.freedesktop.org/show_bug.cgi?id=99138), presumably a radeon
kernel driver issue.

Earthling Michel Dänzer               |               http://www.amd.com
Libre software enthusiast             |             Mesa and X developer

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