[Bug 82889] [drm:si_dpm_set_power_state] *ERROR* si_disable_ulv failed

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=82889

--- Comment #15 from Alexandre Demers <alexandre.f.demers at gmail.com> ---
(In reply to comment #14)
> (In reply to comment #11)
> > Is ULV standing for Ultra-low voltage? If so, isn't this option something
> > meant to be applied on APU only?
> 
> Mmm don't know. 
> Haven't digged more, but my GPU (R7-265) is running hotter than before,
> always around 39°-40° (even without any running application).
> With the kernel in debian sid, 3.16.X, I can see low temperatures in idle.
> 
> I'm unable to trigger this warning booting up with radeon.dpm=0, so I think
> is something related to power management.

Well, according to my journalctl log, it seems to always be triggered after a
power state switching. It doesn't do it from boot (power state 0) to
performance (power state 1), but it is later. Strangely, I see a 
Sep 25 20:28:28 Xander kernel: switching from power state:
Sep 25 20:28:28 Xander kernel:         ui class: performance
...
Sep 25 20:28:28 Xander kernel: switching to power state:
Sep 25 20:28:28 Xander kernel:         ui class: performance

Why would it try to switch from power state 1 to power state 1 (the same power
state)? And why is it at that moment the problem arises? I'll have to do more
tests to see if this behaviour happens each time.

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