https://bugzilla.kernel.org/show_bug.cgi?id=70651
Zsolt Barat zsolt@softmonsters.com changed:
What |Removed |Added ---------------------------------------------------------------------------- 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.