hybrid-graphics-linux team mailing list archive

[Quentin Gibeaux <plusquezero@xxxxxxxxx>]

Hi,
I don't have any idea of how to study GraphicsSwitch Utility but for the
moment you can use the hibernate mode of your GNU/Linux, the «optimus flag»
won't be changed, you only have to re-shutdown the ION each time you restore
your session.

Regards…
Quentin Gibeaux

2010/12/22 Raphael Metzler <raphdev@xxxxxxxxxxxxxx>

> 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!
>
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