Mike Silbersack wrote:
> On Thu, 6 May 2004, Nate Lawson wrote:
>>>Does devd receive lid status events? I'm thinking that it would be
>>>advantageous for my battery life if I could throttle the cpu down whenever
>>>the lid is closed.
>># Examples of notify hooks. A notify is a generic way for a kernel
>># subsystem to send event notification to userland.
>>If you want to change CPU idle states and/or throttling on AC line
>>transition, see the appropriate values in /etc/rc.conf. But for one-offs
>>like lid to control CPU, using devd.conf and a small script is the way to
> Good deal, it works as avertised. I even learned a bit of shell scripting
> in the process of writing a simple speed switching script. :)
> Of course, the real question is whether or not it'll actually help battery
> life at all; this is a mobile celeron, I suspect that I won't have much of
> an impact. Ah well.
> Mike "Silby" Silbersack
I've found that the best way to extend battery life on a laptop is to
turn down the display brightness as low as possible. CPU throttling,
PCI power states, etc, make a small (but measurable) difference on my
P4-M laptop, but the real win comes from turning down the brightness.