[Bug 112240] Resume from suspend hangs gfx10 card

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=112240

            Bug ID: 112240
           Summary: Resume from suspend hangs gfx10 card
           Product: DRI
           Version: DRI git
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: not set
         Component: DRM/AMDgpu
          Assignee: dri-devel at lists.freedesktop.org
          Reporter: 42.pablo.ms at gmail.com

Created attachment 145929
  --> https://bugs.freedesktop.org/attachment.cgi?id=145929&action=edit
Dmesg snippet

Title is self explanatory. I've looked into similar reports but my dmesg is
different from all of them.

System:
Ryzen 2600 
Asus PRIME x470 PRO
16GB of RAM at JEDEC speeds
Reference navi 5700

4K freesync enabled LG display

Arch Linux with lcarlier's mesa-git+llvm-git+xf86-video-amdgpu-git and amd's
staging kernel.

Upon resume I captured this via SSH. System still "works", without screen.
Touching GPU stuff like the debug reset just makes it worse and/or completely
freezes the thing.

Link:
https://pastebin.com/raw/RwnHbvgS

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