Re: Battery Life
(replying to this on-list)
On Monday 24 June 2002 12:38 am, Joris wrote:
> On Sun, Jun 23, 2002 at 11:21:32PM -0700, Derek Gladding wrote:
> > On Friday 21 June 2002 07:47 pm, Andrew Biggadike wrote:
> > > I'm running Woody on a Dell Latitude C800 and yesterday I noticed
> > > that the battery life of my laptop ran out much quicker than it
> > > does when it is booted into Windows. (Approx. 50 min compared to
> > > 2.5 hrs.)
> > >
> > > Does anybody know of any reasons that may cause this, or
> > > potential solutions? Thanks,
> > >
> > > Andrew
> > >
> > > (If you need more system info just let me know)
> > Have you got your kernel compiled to "make CPU Idle calls when Idle
> > ?"
> > Are you running a journalling FS (ext3 etc) which will stop your HD
> > from ever spinning down ?
> > Those are the two biggest things (in my experience) which affect
> > battery life.
> I assume that the former is a Good Thing (tm) and the later is an
> energy waster?
Yes, very much so. I was amazed at how much different the CPU Idle calls
made to battery life - not only does the CPU not draw as much power, but
the reduced heat means the fan doesn't need to kick in as often.
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