[Bug 70651] cannot write to power_dpm_force_performance_level: invalid argument (radeon 7730m)

bugzilla-daemon
2014-04-25T14:14:40Z

Zsolt Barat <zsolt@softmonsters.com> changed:

What |Removed |Added
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CC| |zsolt@softmonsters.com

--- Comment #13 from Zsolt Barat <zsolt@softmonsters.com> ---
Hi,
thanks for your comment on this. I'm running into simmilar issue:

root@lisabook2:~# echo "low">
/sys/class/drm/card0/device/power_dpm_force_performance_level
-bash: echo: write error: Invalid argument

I'm also on a hybrid platform: MBP 8,2 with linux-3.14.0
I recently noticed this, that I can't set this value when I use the machine
*without* an external Monitor which I usually don't.
Does it mean that the kernel now switches automatically to the non dGPU, when
the dGPU is not in use? Would be great news.