[Bug 100109] Graphics Lockup if monitor disconnected and then set into standby

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=100109

            Bug ID: 100109
           Summary: Graphics Lockup if monitor disconnected and then set
                    into standby
           Product: DRI
           Version: XOrg git
          Hardware: Other
                OS: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/AMDgpu-pro
          Assignee: dri-devel at lists.freedesktop.org
          Reporter: kierangrant at linux.com

Created attachment 130119
  --> https://bugs.freedesktop.org/attachment.cgi?id=130119&action=edit
Various log files

I got a Kernel Oops from with AMDGPU-PRO for Ubuntu 16.04.2 LTS x86-64 version
16.60 after unplugging and plugging in my HDMI display...

Computer was left on overnight to do some long IO operation... before I left
it, I turned monitor off... at the time my MATE display settings was to put
monitor to sleep after 30 minutes... so I guess it tried that after 30
minutes...

Next day... I got no graphics response... after trying various F-n combos... I
eventually tried some SysRq keys to force text console... but stock Ubuntu
SysRq limit was in effect *doh*...

That is when as a last resort thought to unplug and re-plug in monitor... in
hopes that would magically do something... it did something alright...

I got Kernel OOPS at that moment... it was early morning for me :|

Attached is a snippet of my syslog plus various ls* outputs...

I have a MSI Radeon RX480 8GB

I will see if I can manually reproduce the bug to get a Xorg.log file... I
forgot that one and old one is now gone :/

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