[Bug 107021] AMDGPU crash when Power Management switches off screen

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=107021

            Bug ID: 107021
           Summary: AMDGPU crash when Power Management switches off screen
           Product: DRI
           Version: XOrg git
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/AMDgpu
          Assignee: dri-devel at lists.freedesktop.org
          Reporter: frikraag at gmail.com

Created attachment 140310
  --> https://bugs.freedesktop.org/attachment.cgi?id=140310&action=edit
Trace from dmesg

With "Screen Energy Saving" selected in KDE, my screen does not return to
active state when I use the keyboard or mouse. Instead, the screen remains
blank indefinitely, until system restart or Xorg is killed. This has occurred
in Gnome as well as KDE Plasma 5.13. Each time this occurs, dmesg shows a trace
similar to the one attached. The system only seems to lock when screen is
blanked by power management and I am able to eventually recover by SSHing in
and killing Xorg/SDDM. I have not experienced any issues with "Screen Energy
Saving" disabled.

Steps to reproduce:

1. Enable "Screen Energy Saving" in KDE (or it's Gnome equivalent).
2. Wait time specified and system will not return from screen sleep state.

Other relevant information:

Linux: Arch Linux
Kernel: 4.17.2
AMDGPU: 18.0.1
Xorg: 1.20.0
Hardware:
Motherboard: ROG CROSSHAIR VII HERO, BIOS 0702 05/29/2018
GPU: Radeon RX Vega 64

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