Gentoo Archives: gentoo-user

From: "Johan Blåbäck" <johan.bluecreek@×××××.com>
To: gentoo-user <gentoo-user@l.g.o>
Subject: [gentoo-user] kacpid eating alot of cpu
Date: Mon, 30 Mar 2009 08:57:14

My laptop is in great need of cpu frequency scaling and sleep (it
overheats in 10 minutes of compiling otherwise and sounds like a train
when I'm sleeping), and as it seems on every how to I have found; acpi
is the way it suppose to be.
However acpi isn't so nice, since this is what happens (top)

 85:08.20  firefox
 22:31.57   X
 309:53.76 kacpid

after three days of use (notice the 309h of cpu-time). And in powertop,

15.7% (  inf)       <interrupt> : acpi

acpi takes quite alot of power. And for some reason, sometimes kacpid
takes ~80% for many minutes at a time and if I run powertop during
that period acpi is responsible for ~90%.

I thought that acpi was suppose to help with power waste and stuff
like that. On a forum I read that HAL is the thing one should use and
acpi is going obsolete. However, that doesn't help so much since it
seems as HAL depends on a lot of acpi options in the kernel, which are
the ones wasting the cpu and power.

So my questions are:
Is acpi suppose to act like this?
Can I fix it?
If not, whats the proper way to migrate to HAL?
Does HAL have cpufreq-tools?

Any help appreciated.


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Subject Author
Re: [gentoo-user] kacpid eating alot of cpu Michael Higgins <linux@×××××××.org>