[Bug 199959] New: amdgpu, regression?: system freezes after resume

[bugzilla-daemon at bugzilla.kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=199959

            Bug ID: 199959
           Summary: amdgpu, regression?: system freezes after resume
           Product: Drivers
           Version: 2.5
    Kernel Version: 4.17
          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 276359
  --> https://bugzilla.kernel.org/attachment.cgi?id=276359&action=edit
failed resume - journalctl output

After suspend and resume, I see the lock screen, but mouse cursor doesn't move,
pressing keys doesn't seem to change anything (can't perform VT switch too).

Sapphire Radeon RX 580 Pulse 8 Gb
Two displays connected through DisplayPort: Dell P2415Q and LG 27UD69P
Cinnamon desktop (Xorg)
Arch Linux

Happens on kernels 4.16.13 and 4.17 (even with amdgpu.dc=0)
Doesn happen with kernel 4.14.48 (and earlier 4.14.*)

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