[Bug 200531] New: amdgpu: *ERROR* REG_WAIT timeout when a display is put to sleep

[bugzilla-daemon at bugzilla.kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=200531

            Bug ID: 200531
           Summary: amdgpu: *ERROR* REG_WAIT timeout when a display is put
                    to sleep
           Product: Drivers
           Version: 2.5
    Kernel Version: 4.17.6
          Hardware: x86-64
                OS: Linux
              Tree: Mainline
            Status: NEW
          Severity: normal
          Priority: P1
         Component: Video(DRI - non Intel)
          Assignee: drivers_video-dri at kernel-bugs.osdl.org
          Reporter: mezin.alexander at gmail.com
        Regression: No

Created attachment 277391
  --> https://bugzilla.kernel.org/attachment.cgi?id=277391&action=edit
dmesg

When a display is turned off (because of inactivity), sometimes I see "*ERROR*
REG_WAIT timeout" from amdgpu in the kernel log. And sometimes when the display
wakes up, GUI doesn't respond anymore (even mouse pointer isn't moving).

full dmesg output attached

card: RX Vega 64 (Sapphire Nitro+)

I think it started with 4.17.5 or 4.17.6, i'll try to find the exact commit

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