cvs commit: src/sys/dev/acpica/Osd OsdSynch.csrc/sys/i386/include acpica_machdep.h src/sys/ia64/include acpica_machdep.h src/sys/amd64/include acpica_machdep.h

[Mike Silbersack]

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.
>
> cat /etc/devd.conf:
> # 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
> go.
>
> -Nate

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