hybrid-graphics-linux team mailing list archive

[Gwendal Rogel <pythot@xxxxxxxx>]

 On 28/06/2010 00:54, Michal Kottman wrote:
> Although I cannot use the NVIDIA in Ubuntu 10.10 right now, at least I
> wanted to turn it off, so it drains less battery.
>
> I've created a simple module ( http://github.com/mkottman/acpi_call )
> that allows to call ACPI methods by writing to /proc/acpi/call, mainly
> to test out the methods listed on
> http://linux-hybrid-graphics.blogspot.com/
>
> I can confirm that \_SB.PCI0.PEG1.GFX0.DOFF and \_SB.PCI0.PEG1.GFX0.DON
> turn the NVIDIA card off and on respectively. A test run showing
> acpi_call in action is attached as acpi_call_test.txt
Thanks for that! I'll test it when I have some time.
> However, when I try to do the same thing using vga_switcheroo, using:
>
> echo 'OFF'>  /sys/kernel/debug/vgaswitcheroo/switch
>
> I get a kernel stack trace somewhere in nouveau_switcheroo_set_state
> (see attached vga_switcheroo_off_stacktrace.txt).
I have the same issue. This could be related to the fact that the 
nouveau driver cannot
find the VBIOS image from ACPI.
Look at the output of: $ dmesg |grep "01\:00\.0"

Cheers,
Gwendal
[Archlinux 2.6.34 (x86_64) | Asus N61JV/GeForce GT325M/i5M430]