Fighting for the power.
Paul B. Mahol
onemda at gmail.com
Mon May 4 09:40:43 UTC 2009
On 5/4/09, Alexander Motin <mav at freebsd.org> wrote:
> 2. PCI devices
> PCI bus provides method to control device power. For example, I have
> completely no use for my FireWire controller and most of time - EHCI USB
> controller. Disabling them allows me to save about 3W of power. To
> disable all unneeded PCI devices you should build kernel without their
> drivers and add to loader.conf:
> To enable devices back all you need to do is just load their drivers as
Unloading modules doesnt put them back into into D3 state.
You are forced to load some another module again to put wanted device
into D3 state.
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