[Bug 77181] radeon -- GPU lockup when hibernating or waking up

[bugzilla-daemon at bugzilla.kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=77181

--- Comment #7 from Mantas Mikulėnas <grawity at gmail.com> ---
(In reply to Alex Deucher from comment #2)
> Is this a regression?  If so, can you bisect?

Narrowed it down to the UVD merge for 3.10 (f18353eee757).

ec5891fbe1b0 ("drm/radeon: UVD bringup v8") was the first commit with the
"fence wait failed" errors:

[  +0.010612] sd 0:0:0:0: [sda] Starting disk
[  +9.661530] radeon 0000:01:00.0: GPU lockup CP stall for more than 10000msec
[  +0.000003] radeon 0000:01:00.0: GPU lockup (waiting for 0x0000000000000004
last fence id 0x0000000000000002)
[  +0.000003] [drm:r600_uvd_ib_test] *ERROR* radeon: fence wait failed (-35).
[  +0.000002] [drm:radeon_ib_ring_tests] *ERROR* radeon: failed testing IB on
ring 5 (-35).
[  +1.614706] PM: restore of devices complete after 11819.193 msecs

Seven commits in between [f2ba57b5eab8, ef0e6e657cfe] were also bad, but with a
different error message:

[  +0.010618] sd 0:0:0:0: [sda] Starting disk
[  +0.560078] [drm:r600_uvd_init] *ERROR* UVD not responding, trying to reset
the VCPU!!!
[  +1.020296] [drm:r600_uvd_init] *ERROR* UVD not responding, trying to reset
the VCPU!!!
[  +1.020318] [drm:r600_uvd_init] *ERROR* UVD not responding, trying to reset
the VCPU!!!
[  +1.020299] [drm:r600_uvd_init] *ERROR* UVD not responding, trying to reset
the VCPU!!!
[  +1.020297] [drm:r600_uvd_init] *ERROR* UVD not responding, trying to reset
the VCPU!!!
[  +1.020298] [drm:r600_uvd_init] *ERROR* UVD not responding, trying to reset
the VCPU!!!
[  +1.020298] [drm:r600_uvd_init] *ERROR* UVD not responding, trying to reset
the VCPU!!!
[  +1.020323] [drm:r600_uvd_init] *ERROR* UVD not responding, trying to reset
the VCPU!!!
[  +1.020297] [drm:r600_uvd_init] *ERROR* UVD not responding, trying to reset
the VCPU!!!
[  +1.020297] [drm:r600_uvd_init] *ERROR* UVD not responding, trying to reset
the VCPU!!!
[  +0.020007] [drm:r600_uvd_init] *ERROR* UVD not responding, giving up!!!
[  +0.000001] [drm:evergreen_startup] *ERROR* radeon: error initializing UVD
(-1).
[  +0.000026] [drm] ib test on ring 0 succeeded in 0 usecs
[  +0.000025] [drm] ib test on ring 3 succeeded in 1 usecs
[  +1.614533] PM: restore of devices complete after 11878.332 msecs
[  +0.055061] PM: Image restored successfully.

4474f3a91f95 was the last good commit:

[  +0.010691] sd 0:0:0:0: [sda] Starting disk
[  +1.154120] PM: restore of devices complete after 1645.354 msecs

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