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[ubuntu] Did anyone managed to switch off the discrete graphic card on Asus k53 k53sj ?

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http://ubuntuforums.org – I tried to to use the ACPI call method ( http://linux-hybrid-graphics.blogspo...tch-onoff.html ) using 'echo '\_SB.PCI0.PEGR.GFX0._OFF' > /proc/acpi/call'. As it has been reported, this works in switching off the graphic card but 10 seconds later the laptop fan starts spinning at full speed. Also I'm not savvy enough to get 'asus switcheroo' to work... Some fellow proprietary help, please ;) (Hardware)