hybrid-graphics-linux team mailing list archive

[Nuno Lourenco <nlourenz@xxxxxxxxx>]

Great work Pete! And thanks for sharing! :)

I was crying out loud to find time in order to turn off the NV GPU! Many
thanks!

Btw, how's the average power consumption in linux without the NV GPU?

I'll try to test this on my 1215N in a few hours, i'll reply my experience
then :)

Thanks once again for the great work Pete ;)

On Mon, Oct 11, 2010 at 5:09 PM, Pete Eberlein <pete.eberlein@xxxxxxxxx>wrote:

> I successfully powered down the Nvidia device in my Asus 1215N.  I modified
> the apci_call module and created a script to power it off and on.  Here is
> the github fork:
>
> http://github.com/peberlein/acpi_call
>
> I owe a huge thanks to Mkottman for acpi_call and George Shearer for
> m11xr2hack.  Those sources were excellent for learning about acpi and
> buffers.
>
> I modified the acpi_call module to allow byte buffers to be passed as
> parameters, and also to return the acpi_object result in /proc/acpi/call.
> Being able to see the result helped me figure out some of the state in the
> acpi methods.
>
> The 1215N is similar to the m11x r2 in that it requires a special method
> (_DSM) being called with buffer arguments before the _PS3 method will turn
> the power off.   I also found that the _PS0 method turns the power back on.
> After turning off the power, the power state appears to be set in the _PSC
> object: 0x0 when on, and 0x3 when off.  Except this isn't accurate after the
> system has been put in standby - the power is on (according to the battery
> rate) but the_PSC is still 0x3.  I have to use the script to turn the power
> off again after coming out of standby.
>
> Regards,
> Pete Eberlein
>
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