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[drphd <drphd@xxxxxxxxx>]

I have a Dell studio XPS 13 with two Nvidia cards including G210M
My DSDT is attached...

I have found a method that switches off discreet card (tested on my laptop - pls confirm):
status = acpi_get_handle(root_handle, "\\_SB.PCI0.XVR0.Z01I.DGOF", &handle);

** Attachment added: "DSDT.dsl"
   http://launchpadlibrarian.net/50995553/DSDT.dsl

-- 
support graphics card hot switch
https://bugs.launchpad.net/bugs/312756
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