https://bugzilla.kernel.org/show_bug.cgi?id=198551
Alex (linuxale@libero.it) changed:
What |Removed |Added ---------------------------------------------------------------------------- CC| |linuxale@libero.it
--- Comment #3 from Alex (linuxale@libero.it) --- I had a similar problem on a Dell Latitude E5470. I had the follow error in the logs once reboot the system after a suspend:
Jun 21 07:50:57 sabayon kernel: [drm:atom_op_jump [amdgpu]] *ERROR* atombios stuck in loop for more than 5secs aborting Jun 21 07:50:57 sabayon kernel: [drm:amdgpu_atom_execute_table_locked [amdgpu]] *ERROR* atombios stuck executing 73EA (len 272, WS 0, PS 4) @ 0x7433 Jun 21 07:50:57 sabayon kernel: [drm:amdgpu_atom_execute_table_locked [amdgpu]] *ERROR* atombios stuck executing 6036 (len 70, WS 0, PS 8) @ 0x605C Jun 21 07:50:57 sabayon kernel: [drm:amdgpu_device_resume [amdgpu]] *ERROR* amdgpu asic init failed
And the X never came back to life.
The trick as suggested above was to disable the amdgpu Power Management
GRUB_CMDLINE_LINUX_DEFAULT="amdgpu.runpm=0"
Now suspend and hibernate works like a charm!.