Joerg Sommer <[EMAIL PROTECTED]> writes: > John Steele Scott <[EMAIL PROTECTED]> wrote: >> The Linux kernel driver does not implement this (instruction cache >> throttling) >> at all. Still, I get over four hours on battery on my 12" iBook G4 with 7447A > > At which backlight level? I'd never reached four hours with my new ibook > (I had three and a half hour) and after a year and a few months I come up > to three, but never four. But I use 12 as backlight level and the level > can increase / decrease the time very heavy.
It has been a few months since I was regularly running off battery, but I was usually using close to maximum backlight levels. That was on a Gentoo system with kernel 2.6.9. I think what gave me the extra time was the laptop-mode script and agressive hard disk spin-down times. I have not measured or tweaked my battery life since switching to Ubuntu, since I don't leave my desk so much these days. Depending on your usage pattern, getting pbbuttonsd to be aggressive about dimming the backlight can help as well. cheers, John
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