[Nouveau] properly check for _DSM function support and Optimus support for vga_switcheroo
lekensteyn at gmail.com
Mon Dec 19 05:26:27 PST 2011
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
and rebuild the nouveau kernel module.
A comparison of different methods that works for toggling the dGPU is
On Mon, Dec 19, 2011 at 11:04 AM, Gianluca Cecchi <gianluca.cecchi at gmail.com
> >> On Sat, Dec 17, 2011 at 5:50 PM, Lekensteyn <lekensteyn at gmail.com>
> >>> 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
> >>> the
> >>> mainline kernel.
> >>> It has been tested on my Clevo B7130 laptop running kernel 3.2 which
> I have an Asus U36SD laptop with Optimus and Fedora 16 with kernel
> 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 : 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 : 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
> Nouveau mailing list
> Nouveau at lists.freedesktop.org
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