Hi!
> I recently discovered that my Inspiron 6000 uses about 50% more power
> idling in linux than in windows XP. This means its battery life is
> about 2/3 of what it could/should be.
>
> I guessed it might be the CPU, and did some tests. The results strongly
> suggest as much. These are the results I got for power consumption in
> various situations.
>
> linux idle at 800MHz: 27W
> linux idle at 1600MHz: 36W
> linux raytracing at 800: 30W
> linux raytracing at 1600: 42W
>
> windows idle (presumably 800MHz): 16W
> windows raytracing (presumably 1600MHz): 36W
>
> I've tried ubuntu dapper and ubuntu edgy, and RIP 10 (rescue disk) and
> BBC 2.1 (rescue disk), and they all appear to have the same issue. The
> machine's BIOS has no APM so I can't try it for comparison.
Let me guess, UHCI? Remove usb modules, and measure again.
For details, see 8hours on your lap presentation, linked from
http://www.livejournal.com/~pavelmachek .
Pavel
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