Hello List! I'm happy to report that I successfully turned off the Nvidia chip on the Asus EeePC 1015PN.
The Call to disable the Nvidia GT218 Chip is: echo '\_SB.PCI0.P0P4.DGPU.DOFF' > /proc/acpi/call and to re-enable it: echo '\_SB.PCI0.P0P4.DGPU.DON' > /proc/acpi/call Just for completeness: This are the needed steps to enable the intel 3150 VGA build into the N550 CPU & disable the Nvidia Chip: - Boot into windows (unfortunately not joking) and use the shipped Asus Gaphics Card Switching tool to set the "Optimus" Mode and Proceed with the suggested Reboot - Boot once again into Windows7 (this is required!) and check that Optimus mode is enabled and used. If in use a Intel Icon will be present in the notification area on the bottom right of the panel - Now boot into Linux. You won't get a Xserver or GDM login screen and be dropped to a text shell. Login and cd to the folder where you build the acpi_call module - insmod the acpi_call.ko module and turn off the nvidia gpu with: echo '\_SB.PCI0.P0P4.DGPU.DOFF' > /proc/acpi/call - edit the xorg.conf file to use the intel driver instead of the nvidia binary / nouveau driver. ... Section "Device" Identifier "Device0" Driver "intel" VendorName "Intel GMA 3150" BusID "PCI:0:2:0" EndSection ... - now restart the Xserver / Login Manager and enjoy the prolonged runtime Turning off the Nvidia chip results in a power consumption of ~ 770 mA (compared with ~1300 mA with the Nvidia chip enabled) Cheers!
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