Summary: vgaswitheroo does not really turn off NVD9 on linux
Product: openSUSE Factory
Version: 12.3 Milestone 1
Priority: P5 - None
Found By: ---
User-Agent: Opera/9.80 (X11; Linux x86_64) Presto/2.12.388 Version/12.11
My laptop has an ugly optimus configuration with nvidia geforce 520M (aka nvd9)
I usually switch useless nvidia card to save battery like this:
echo OFF > /sys/kernel/debug/vgaswitheroo/switch
But it looks that the trick does not work with linux 3.7.
When the nvidia card is turned on, average power consumption is about 20W
(according to powertop)
But if I turn off the nvidia card, power consumption would drop to 7-8W. Or at
least it used to be so on older kernels.
After I turn off nvidia on 3.7, its state in
/sys/kernel/debug/vgaswitheroo/switch becomes 'off', nit the computer is still
hot and consumes much power.
Steps to Reproduce:
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