[Bug 72716] SIGBUS in EVERGREENUploadToScreen after hibernation (Linux 3.12.4-tuxonice)

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=72716

--- Comment #8 from txtoxtox285 at googlemail.com ---
During the many cycles of “printk, compile, reboot, suspend, resume, crash X”
I’ve found that the problem may have to do with the fact that I load radeon.ko
during my initramfs before attempting resume by echoing into /sys/power/resume
or /sys/power/tuxonice/do_resume.

If I do *not* load radeon.ko into the “booting” kernel (i.e., the one which is
then replaced by the “resuming” kernel), I couldn’t reproduce the crash.
Furthermore, I do *not* get these four messages from the “resuming” kernel
about a lockup:

[  864.574325] radeon 0000:01:00.0: GPU lockup CP stall for more than 10000msec
[  864.574328] radeon 0000:01:00.0: GPU lockup (waiting for 0x0000000000000004
last fence id 0x0000000000000002)
[  864.574331] [drm:uvd_v1_0_ib_test] *ERROR* radeon: fence wait failed (-35).
[  864.574334] [drm:radeon_ib_ring_tests] *ERROR* radeon: failed testing IB on
ring 5 (-35).

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