Comment 114 for bug 312756

Hi everybody,

since I'm following the thread from a long time, I'm getting more and
more doubtful about the nvidia state.

Actually, I'm just using the acpi_osi="Windows 2006!" way to use both
cards (cold switching) on Fedora 12.
But I'm wondering wether it's really the good way.

I've never used the kernel module which is often spoken about (see in
the quoted mail). However, it seems to me as if it was ok.
As if, the cold switching was just all right. Nothing else to do.

What are the positive uses of this kernel module ?
Doesn't the switching just switch off the second graphic card ?

When I'm on stamina, lspci | grep -i nv doesn't show any card.
When I'm on speed, I suppose we cannot disable the intel one (but I
actually don't care since it's not a big problem : we want graphic
power, not battery time).

When the led's switched off (no light), then I can see both card, but
only the intel one is working (but that doesn't look like the winning
way for the nvidia card is also working and eating battery time).

I wonder if the nvidia card off also means it's not using battery ? Is
it what the kernel module is intended to ? Or something else ?

Thanks for the great work
Alexandre Kaspar

Narciso Cerezo <email address hidden> a écrit :

> @toni
> Hi, the way to "kill" (disable) the nvidia card is through a
> contributed kernel module:
> http://linux-hybrid-graphics.blogspot.com/2009/12/solution-to-switch-off-nvidia-card-in.html
> I will check again if a BIOS update is available for my Asus UL50VT,
> but there was no option to change between cards or modes as your
> Lenovo has :(
> The BIOS should have such an option, it is not like choosing at boot
> time or like switching it live, but will do the trick in the mean
> time.
>
>
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>

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