setup hybrid graphic in grub
Lenovo Y460 Intel core i3 and ATI Radeon 5650
there is three steps in the process:
echo ON > /sys/kernel/debug/vgaswitcheroo/switch # use all graphics
echo IGD > /sys/kernel/debug/vgaswitcheroo/switch # open IGD
echo OFF > /sys/kernel/debug/vgaswitcheroo/switch # close DIS
unfortunately, it does not work because /sys could not be write before
it had been mounted with debugfs, so, I don't know how to the author
could make it works.
so, how to make it works?
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