[Bug 69301] no screen on update from 3.12.0

[bugzilla-daemon at bugzilla.kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=69301

--- Comment #13 from Alex Deucher <alexdeucher at gmail.com> ---
(In reply to Jakob Kummerow from comment #12)
> Bisection result:
> 
> commit 56684ec5b050e6a392cb3e5324eda12a13413a57
> Author: Alex Deucher <alexander.deucher at amd.com>
> Date:   Wed Oct 30 10:18:37 2013 -0400
> 
>     drm/radeon: enable DPM by default on BTC asics
>     
>     Seems to be stable on them.
> 
> 
> Which makes sense in so far as I have a Barts card, but obviously this
> commit did not introduce the actual problem. I guess I'll have to bisect
> again with an explicit radeon.dpm=1 kernel parameter.
> 
> FWIW, on 3.12 and earlier, I used to "echo low >
> /sys/class/drm/card0/device/power_profile" by means of an init script, and
> never had any issues with that.

Jakub, you are seeing bug 68571 since you have a BTC card.  Jan is seeing an
issue with an SI card.

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