[Nouveau] [Bug 98398] Vgaswitcharoo fails to turn off GPU properly

bugzilla-daemon at freedesktop.org bugzilla-daemon at freedesktop.org
Sat Oct 22 22:17:55 UTC 2016


--- Comment #3 from rick.2889 at gmail.com ---
Created attachment 127486
  --> https://bugs.freedesktop.org/attachment.cgi?id=127486&action=edit
New dmesg output after manually turning on power management

So Lekensteyn asked me to run a few commands to also shut off the bus the GPU
is on.

If I do so and then proceed by running powertop on battery, intel_pstate
complains about turbo not being available, a usb device disconnects, a while
later Nouveau resumes kernel object trees, Bluetooth reconnects and nouveau
suspends again.

The commands are:
# echo auto > /sys/bus/pci/devices/0000\:00\:1c.4/power/control 
# grep .

The latter returns auto, suspended, auto, suspended before running powertop,
and on, active, auto, suspended after running powertop.

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