[Bug 67187] Radeon HD6950: UVD not responding, trying to reset the VCPU

[bugzilla-daemon@freedesktop.org]

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https://bugs.freedesktop.org/show_bug.cgi?id=67187

--- Comment #3 from Harald Judt <h.judt@gmx.at> ---
Ok, good news first: It doesn't seem to have to do anything with playing videos
using UVD. In fact, playing videos works fine and doesn't have any bad effect
on suspending or hibernating.

But there are worse troubles now. The reason the error messages started to
appear was because I set /sys/power/pm_async to 1 - to make it faster -, albeit
for suspend/resume only. This explains why they appeared only for some cycles.
I've always set pm_async to 0 because of my hibernate/resume problems described
in bug #44772. Before the introduction of UVD support, suspend/resume worked
reliably with pm_async=1. Now that's not the case anymore and pm_async=0 has
become mandatory. But what's worse, even with pm_async set to 0, suspend/resume
doesn't work reliable anymore. Sometimes the monitor simply turns off when
suspending, and the system hangs. Previously, that was only the case with
hibernate/resume at resume time.

Now I wonder... Maybe the card simply takes more time to initialize? At least
the error message states UVD failed to initialize... Is there some way to add a
delay at resuming/initializing, maybe this would help?

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