Wireless on linux/Battery Life

[Gavin McDonald]

I don't know what happened to this thread, but I found the following just
now, and thought it pertinent enough to post:

"Intel Speedstep
You will most definitely want to "modprobe speedstep" or "modprobe
speedstep-ich" at startup, depending on which version of the kernel you're
running. This will load the kernel's speedstep module which will throttle
the CPU when operating on battery power. If you don't load this module, the
T30 will continue to run at full 2Ghz speed on battery, which will last all
of about 45 minutes. "

"...setting the hard-disk spindown to 5 minutes and setting "laptop mode" in
the kernel makes a slight change in battery life...although it is still
pretty poor in Linux. "

Both quotes are from this page:
http://www.nuclearelephant.com/papers/t30.html

And should help increase your battery life.

Regards,

Gavin McDonald
========================
EVI Logistic Enterprises
email: me at gavitron.com
phone: (604) 313-3845


> -----Original Message-----
> From: Cesar Covarrubias [mailto:cesar at uci.edu]
> Sent: Monday, October 24, 2005 10:28 AM
> To: me at gavitron.com; General Red Hat Linux discussion list
> Cc: 'General Red Hat Linux discussion list'
> Subject: RE: Wireless on linux/Battery Life
> 
> Hello,
> 
> When I did the install, I included everything. Perhaps its a matter of
> locating the settings for the power management.
> 
> --
> Very Respectfully,
> Cesar Covarrubias
> Distributed Computing Support
> Network and Academic Computing Services
> University of California, Irvine
> (949)824-6612 - Office
> (310)502-3554 - Cell
> 
> > again, speaking in general,  Did you install & configure the
> > Power-management rpms with your fedora install?  It sounds like you're
> > running your laptop without any power-saving features enabled.  When
> > properly configured, any red-hat/fedora install should give you 2-3
> hours
> > battery life as well.
> >
> > Regards,
> >
> > Gavin McDonald
> > ========================
> > EVI Logistic Enterprises
> > email: me at gavitron.com
> > phone: (604) 313-3845
> >
> >
> >> -----Original Message-----
> >> From: redhat-list-bounces at redhat.com [mailto:redhat-list-
> >> bounces at redhat.com] On Behalf Of Cesar Covarrubias
> >> Sent: Monday, October 24, 2005 9:01 AM
> >> To: 'General Red Hat Linux discussion list'
> >> Subject: RE: Wireless on linux/Battery Life
> >>
> >> Hello,
> >>
> >> I'm speaking in general, without using wireless. When I'm running
> >> Windows
> >> (dual boot) battery lasts 2-3 hrs fully charged, when on fedora, bout
> 45
> >> minutes. I was thinking about upgrading anyways to RHEL 4. I'll look
> >> into
> >> the bios configuration.
> >>
> >> Very Respectfully,
> >> Cesar Covarrubias
> >> Distributed Computing Support
> >> Network and Academic Computing Services
> >> University of California Irvine
> >> (949)824-2222
> >>
> >>
> >> -----Original Message-----
> >> From: redhat-list-bounces at redhat.com [mailto:redhat-list-
> >> bounces at redhat.com]
> >> On Behalf Of Tom Greaser
> >> Sent: Monday, October 24, 2005 7:19 AM
> >> To: redhat-list at redhat.com
> >> Subject: re: Wireless on linux/Battery Life
> >>
> >> dont know what to tell you about ndiswrapper question. other than
> >> see if your vendor offers source for your nic.
> >>
> >> as for the power question. are you referring to your wifi nic being
> >> enabled ?
> >> if so man iwconfig.
> >>
> >> or in general power use.. check your bios to see if apm is enabled and
> >> configure it to your needs
> >> How does your current battery life compair to what the vendor specs are
> >> ?
> >>
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> 
>