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

Package:
xserver-xorg-video-radeon
Source:
xserver-xorg-video-ati
Description:
X.Org X server -- AMD/ATI Radeon display driver
Submitter:
Arthur Marsh
Date:
2018-12-17 17:18:10 UTC
Severity:
important
#848575#5
Date:
2016-12-18 13:48:36 UTC
From:
To:
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.

   * What exactly did you do (or not do) that was effective (or
     ineffective)?
   * What was the outcome of this action?
   * What outcome did you expect instead?

*** End of the template - remove these template lines ***
#848575#10
Date:
2016-12-19 02:40:44 UTC
From:
To:
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.