[Bug 93615] Tonga does not recover from standby

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=93615

            Bug ID: 93615
           Summary: Tonga does not recover from standby
           Product: DRI
           Version: unspecified
          Hardware: Other
                OS: All
            Status: NEW
          Severity: blocker
          Priority: medium
         Component: DRM/AMDgpu
          Assignee: dri-devel at lists.freedesktop.org
          Reporter: EoD at xmw.de

Standby worked flawlessly on my BARTS (radeon/r600). With the TONGA
(amdgpu/radeonsi) the system is not able to recover after the standby. Seems
like a hard-lockup.

I put my system into standby by doing:
  echo mem > /sys/power/state

I tried both kernel 4.4-rc7 and the 4.5-drm-next branch.

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