[Bug 199577] New: amdgpu fails to return from powersaving mode

[Bug 199577] New: amdgpu fails to return from powersaving mode

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=199577

            Bug ID: 199577
           Summary: amdgpu fails to return from powersaving mode
           Product: Drivers
           Version: 2.5
    Kernel Version: 4.17_rc3
          Hardware: All
                OS: Linux
              Tree: Mainline
            Status: NEW
          Severity: normal
          Priority: P1
         Component: Video(DRI - non Intel)
          Assignee: drivers_video-dri@kernel-bugs.osdl.org
          Reporter: adebeus@gmail.com
        Regression: No

Created attachment 275681
  --> https://bugzilla.kernel.org/attachment.cgi?id=275681&action=edit
dmesg output

I've been testing the new 4.17 kernel, which finally works for me with the new
AMDGPU DC and DP MST monitors (4.15 and 4.16 did not).

However, after the system is idle for long enough for DPMS to activate, the
monitors will turn off, but never turn back on. Despite the monitors not
working, I was able to SSH into the machine and obtain the output of dmesg,
which is attached. I am using a Tonga GPU (Sapphire R9 380).

I would be happy to test any patches that are available or provide any other
necessary information.

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