linux tool to find out what is using power on a laptop
PowerTOP is a Linux tool that finds the software component(s) that
make your laptop use more power than necessary while it is idle. As of
Linux kernel version 2.6.21, the kernel no longer has a fixed 1000Hz
timer tick. This will (in theory) give a huge power savings because
the CPU stays in low power mode for longer periods of time during
However... there are many things that can ruin the party, both inside
the kernel and in userspace. PowerTOP combines various sources of
information from the kernel into one convenient screen so that you can
see how well your system is doing, and which components are the
What's eating the battery life of my laptop? Why isn't it many more
hours? Which software component causes the most power to be burned?
These are important questions without a good answer... until now.
The Linux 2.6.21 kernel introduces the so called tickless-idle
feature. This feature allows the processor to be really idle for long
periods of time, rather than having to wake up every millisecond
powertop - program to analyze power consumption on Intel-
This manual page documents briefly the powertop commands.
powertop is a program that shows the power consumption on
Intel-based laptops and makes suggestions on how
powertop (1.9-2~bpo40+1) etch-backports; urgency=low
* etch backport.
-- Robert S. Edmonds <firstname.lastname@example.org> Sat, 22 Dec 2007 16:46:39 -0500
powertop (1.9-2) unstable; urgency=low
* Changed my maintainer address
* Bumped Standards-Version to 3.7.3.
* Instead of using /dev/scd0 as disk drive use /dev/cdrom for
hal-disable-polling (Created patch fix-hal-disable-polling.dpatch)
* add support for mac80211 based wireless power saving
* improve bluetooth inactivity detec
This package was debianized by Petter Reinholdtsen <email@example.com> on
Sat May 12 23:22:21 CEST 200
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