Hi, On Thu, Dec 24, 2009 at 01:26:31AM +0500, vrinda vasishth wrote: > Hi all > I am using ubuntu 9.04 32 bit version on Sony-vaio vgn with 64 bit > processor. > I am attaching the powertop output and output of /cat/proc/interrupts in 5 > mins time interval. > The problem is that kernel ipi interrupts and interrupts from from > keyboard/mouse/touchpad are very high and so the wake-ups from idle are as > high as 400 per sec (sometimes even 500). This is ruining my battery life.
I don't quite believe it yet ;) Are the input device wakeups a permanent phenomenon, or is it use-only? (note that your powertop interval was 3s only!) If it's indeed permanent, then I'd say it's a bug/problem here, otherwise several hundred wakeups/s is entirely normal (given the high resolution that these touchpads etc. use). Try # sleep 5 && powertop -d and keep things idle for real numbers. > When I am using vista laptop runs for at least 4hrs with full load and on > ubuntu with nominal usage also it doesnt run for more than 2hrs max. > Power consumption is also high .(25-30 watts) Yes, but that could easily be something entirely different, such as an incapable video driver: certain notebook(!) cards can easily burn 8W to 10W more than with a power-management-optimized Windows driver, if not even more. 25-30 Watts is quite high indeed (Netbook ~ 8-11 Watts, old P3 notebook <= 20 Watts). Try switching to vesa driver to nail the source of this problem, it can have entirely different power characteristics than the card-specific driver (at least that's the case on a desktop Radeon X1250). Andreas Mohr _______________________________________________ Power mailing list [email protected] http://www.bughost.org/mailman/listinfo/power
