Just to gather a few more details, if you call: echo '\_SB.PCI0.P0P4.DGPU.DON' > /proc/acpi/call
before leaving Linux and rebooting into Windows, does it behave normally back into Optimus-mode in Windows? On Wed, Dec 22, 2010 at 1:27 PM, Raphael Metzler <[email protected]> wrote: > Hi, > > I also managed to power Ion down using \_SB.PCI0.P0P4.DGPU.DOFF > The problem is this GraphicsSwitch Utility. Every time Linux is > booted, the "Optimus" setting is somehow lost meaning > - if you boot into Win7 again, your netbook will be in ION-only mode > meaning you have to reboot to use Win7 in Optimus-mode properly > - if you boot Linux second time, intel chip is hidden (lspci) and you > can only use ion (no way to power it down, here) > > I really do not understand what this tool is doing. Does it write to > bios and simply change a flag? But why the hell is linux overwriting > this flag? > Does it do something with the efi-partition? > Maybe the next thing to do is to reverese engineer this application. > > Thing is, with all this required rebooting, this netbook is pretty > useless for me as I need it both for windows and linux :( > I hope we can make any progress with this Switch Utility issue soon > because else I'm thinking about exchanging this nb :( > > Thanks to the whole team for all your work! > > _______________________________________________ > Mailing list: https://launchpad.net/~hybrid-graphics-linux > Post to : [email protected] > Unsubscribe : https://launchpad.net/~hybrid-graphics-linux > More help : https://help.launchpad.net/ListHelp > _______________________________________________ Mailing list: https://launchpad.net/~hybrid-graphics-linux Post to : [email protected] Unsubscribe : https://launchpad.net/~hybrid-graphics-linux More help : https://help.launchpad.net/ListHelp
