[Nouveau] properly check for _DSM function support and Optimus support for vga_switcheroo

[Ben Skeggs]

On Mon, 2012-01-09 at 00:13 +0100, Lekensteyn wrote:
> Any activity on this? The newly attached patch contains one difference
> with the previous
> one: a dummy function has been added to avoid an error if ACPI is
> disabled.
Dave,

Any thoughts on this?

Ben.

> 
> Regards,
> Lekensteyn
> 
> On Mon, Dec 19, 2011 at 2:26 PM, Lekensteyn <lekensteyn at gmail.com>
> wrote:
>         A quickly written way to test this module is described for
>         Ubuntu at
>         http://pastebin.com/c5XqKSsW. Basically, you need to apply the
>         patch on nouveau
>         and rebuild the nouveau kernel module.
>         
>         A comparison of different methods that works for toggling the
>         dGPU is available:
>         https://github.com/Bumblebee-Project/Bumblebee/wiki/Comparison-of-PM-methods
>         
>         Regards,
>         Lekensteyn
>         
>         
>         On Mon, Dec 19, 2011 at 11:04 AM, Gianluca Cecchi
>         <gianluca.cecchi at gmail.com> wrote:
>                 >> On Sat, Dec 17, 2011 at 5:50 PM, Lekensteyn
>                 <lekensteyn at gmail.com> wrote:
>                 >>>
>                 >>> Hello guys,
>                 >>>
>                 >>> I've prepared a patch based on my findings for the
>                 bbswitch module
>                 >>>
>                 (https://github.com/Lekensteyn/acpi-stuff/tree/master/bbswitch). This
>                 >>> adds a proper
>                 >>> check whether a _DSM function is supported or not
>                 and make OFF / ON for
>                 >>> vga_switcheroo work for nVidia Optimus models. The
>                 patch is based against
>                 >>> the
>                 >>> mainline kernel.
>                 >>>
>                 >>> It has been tested on my Clevo B7130 laptop
>                 running kernel 3.2 which has
>                 
>                 
>                 Hello,
>                 I have an Asus U36SD laptop with Optimus and Fedora 16
>                 with kernel
>                 3.1.5-6.fc16.x86_64
>                 Any way I can test it?
>                 Currently  I'm using acpi_call to switch off nvidia
>                 card and gain 4w
>                 for more battery life.
>                 
>                 [g.cecchi at ope46 ~]$ lspci -vnnn|grep -i vga
>                 00:02.0 VGA compatible controller [0300]: Intel
>                 Corporation 2nd
>                 Generation Core Processor Family Integrated Graphics
>                 Controller
>                 [8086:0126] (rev 09) (prog-if 00 [VGA controller])
>                 01:00.0 VGA compatible controller [0300]: nVidia
>                 Corporation Device
>                 [10de:1050] (rev ff) (prog-if ff)
>                 
>                 What benefit would it give me? Chance to use nvidia
>                 for graphic
>                 related apps ? With nouveau andor nvidia proprietary
>                 driver?
>                 Thanks in advance for any pointer
>                 
>                 Gianluca
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>         
>         
> 
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