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
Message-Id: c52221f0507270733f6b08ad@mail.gmail.com
In Reply to: [gentoo-laptop] powermgr: Unified power management for Gentoo by Thomas Tuttle
1 Thanks Thomas, I'll definitely check it out. One feature I would like to see
2 is the ability to throttle the cpu to manage temperature.
3
4 My laptop occasionally reports spurious high temperatures. Within 3 polls
5 the temperature might be reported as 70C, 97C, 70C. When the kernel sees the
6 97C it powers off the system.
7
8 I've hacked around this by patching the kernel to run /sbin/overheat instead
9 of /sbin/poweroff. Overheat checks the temp again and if it's still hot,
10 shuts down powernowd and sets the cpufreq to its minimum value It then
11 sleeps for 5 seconds and if the temp is still 90C+, calls poweroff.
12
13 The downside is the system is now left in a very slow state. I have not
14 written something to bring it back to a dynamic clocking state. A daemon
15 that would manage all of this would be really appreciated! (Of course, the
16 kernel would still need to be patched to not poweroff until the daemon has
17 had a chance to try cooling things down.)
18
19 <dcm>
20
21
22 On 7/13/05, Thomas Tuttle <tom@×××××××××××××××××××××××.org> wrote:
23 >
24 > I've been working on a program called powermgr. It's a daemon written
25 > in Perl that can control many power management functions on Linux,
26 > including CPU frequency and/or governor, screen brightness, laptop mode,
27 > fan speed, wireless power management, as well as runlevel and services,
28 > based on the state of the system.
29 >

Replies

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