Gentoo Archives: gentoo-laptop

From: Devon Miller <devon.c.miller@×××××.com>
To: gentoo-laptop@l.g.o
Subject: Re: [gentoo-laptop] powermgr: Unified power management for Gentoo
Date: Wed, 27 Jul 2005 14:34:17
In Reply to: [gentoo-laptop] powermgr: Unified power management for Gentoo by Thomas Tuttle
Thanks Thomas, I'll definitely check it out. One feature I would like to see 
is the ability to throttle the cpu to manage temperature.

My laptop occasionally reports spurious high temperatures. Within 3 polls 
the temperature might be reported as 70C, 97C, 70C. When the kernel sees the 
97C it powers off the system.

I've hacked around this by patching the kernel to run /sbin/overheat instead 
of /sbin/poweroff. Overheat checks the temp again and if it's still hot, 
shuts down powernowd and sets the cpufreq to its minimum value It then 
sleeps for 5 seconds and if the temp is still 90C+, calls poweroff. 

The downside is the system is now left in a very slow state. I have not 
written something to bring it back to a dynamic clocking state. A daemon 
that would manage all of this would be really appreciated! (Of course, the 
kernel would still need to be patched to not poweroff until the daemon has 
had a chance to try cooling things down.)


On 7/13/05, Thomas Tuttle <tom@×××××××××××××××××××××××.org> wrote:
> > I've been working on a program called powermgr. It's a daemon written > in Perl that can control many power management functions on Linux, > including CPU frequency and/or governor, screen brightness, laptop mode, > fan speed, wireless power management, as well as runlevel and services, > based on the state of the system. >


Subject Author
Re: [gentoo-laptop] powermgr: Unified power management for Gentoo Thomas Tuttle <tom@×××××××××××××××××××××××.org>