[Bug 66425] "failed testing IB on ring 5" when suspending to disk

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=66425

--- Comment #18 from Harald Judt <h.judt at gmx.at> ---
Created attachment 82304
  --> https://bugs.freedesktop.org/attachment.cgi?id=82304&action=edit
dmesg-hibernate.out

Ok, this is not a problem with tuxonice. I tried hibernating with current
vanilla git again, and indeed the error message occurred when resuming from
disk:

[  168.118207] radeon 0000:01:00.0: GPU lockup CP stall for more than 10000msec
[  168.118208] radeon 0000:01:00.0: GPU lockup (waiting for 0x0000000000000006
last fence id 0x0000000000000004)
[  168.118209] [drm:r600_uvd_ib_test] *ERROR* radeon: fence wait failed (-35).
[  168.118212] [drm:radeon_ib_ring_tests] *ERROR* radeon: failed testing IB on
ring 5 (-35).

Full dmesg attached. The computer resumed but would crash soon afterwards.
Crashes persisted until reboot.

The long delay when suspending was caused by the serial console I had attached
for debugging purposes; It really took a long time to resume but worked
eventually.

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