A quickly written way to test this module is described for Ubuntu at <a href="http://pastebin.com/c5XqKSsW" target="_blank">http://pastebin.com/c5XqKSsW</a>. 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: <a href="https://github.com/Bumblebee-Project/Bumblebee/wiki/Comparison-of-PM-methods">https://github.com/Bumblebee-Project/Bumblebee/wiki/Comparison-of-PM-methods</a> Regards, Lekensteyn <div class="gmail_quote">On Mon, Dec 19, 2011 at 11:04 AM, Gianluca Cecchi <<a href="mailto:gianluca.cecchi@gmail.com" target="_blank">gianluca.cecchi@gmail.com</a>> wrote: <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"> <div>>> On Sat, Dec 17, 2011 at 5:50 PM, Lekensteyn <<a href="mailto:lekensteyn@gmail.com" target="_blank">lekensteyn@gmail.com</a>> wrote: >>> >>> Hello guys, >>> >>> I've prepared a patch based on my findings for the bbswitch module >>> (<a href="https://github.com/Lekensteyn/acpi-stuff/tree/master/bbswitch" target="_blank">https://github.com/Lekensteyn/acpi-stuff/tree/master/bbswitch</a>). 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 </div>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 狢'm using acpi_call to switch off nvidia card and gain 4w for more battery life. [g.cecchi@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 <div><div>_______________________________________________ Nouveau mailing list <a href="mailto:Nouveau@lists.freedesktop.org" target="_blank">Nouveau@lists.freedesktop.org</a> <a href="http://lists.freedesktop.org/mailman/listinfo/nouveau" target="_blank">http://lists.freedesktop.org/mailman/listinfo/nouveau</a> </div></div></blockquote></div>