This bug got solved in 4.9-rc2, from what I saw:
- up to commit 9faa6b0277fab4ab91db4d69bc47566fdfbae48b drm/amd/powerplay: fix
static checker warnings in smu7_hwmgr.c
-> the bug is reproduced
- up to one commit above, eeb2fa0c97ba661f8b7fb210a1de10928b67a47b drm/amdgpu:
potential NULL dereference in debugfs code
-> I have a black screen after resuming the system
- up to one commit above, 24e8df6a6837d6cff182e84b838dc1d6971251fc
drm/amd/powerplay: fix static checker warnings in smu7_hwmgr.c
-> the bug is not reproduced, the resume is OK.
** Changed in: linux (Ubuntu)
Status: Incomplete => Confirmed
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https://bugs.launchpad.net/bugs/1589379
Title:
System frozen after resume, on Ubuntu 16.04 kernel 4.4.0-22
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