[ltp] short battery life on t40

Neil Weisenfeld linux-thinkpad@linux-thinkpad.org
Thu, 11 Sep 2003 11:59:00 -0400


One thing to figure out is why, at least with my recent configuration,
we can't get CPU speeds *below* 600MHz.  That's what Windows does with
low demand and on battery.


Neil


On Thu, 2003-09-11 at 03:18, Jason 'T' Rolfe wrote:
> Hey.  My new T40 is only getting about 2 to 2.5 hours of battery life (as
> reported by apm), as oppposed to the expected 5.  I am running Debian with
> kernel version 2.4.21, as well as apm and the thinkpad and thinkpadpm
> modules.  I've tried running apmiser, but it doesn't appear to do much.  
> My BIOS settings are configured for maximum battery life when not running
> on AC.  /proc/cpuinfo reports that, although my processor is 1.6 ghz, I'm
> only running at 598.076 mhz when using batteries.  I'm not running cpufreq
> or cpudyn, but I would think that they wouldn't do much given that cpuinfo
> reports 600 mhz operating speed.  Do you have any idea how to improve my
> battery life?  Thanks.
> 
> Jason Rolfe
> 
> --
> The red in the sky is ours. . .
>