Date: Mon, 6 Jul 2009 09:22:58 +0200 (CEST) From: "Rene Schickbauer" <cavac@magicbooks.org> To: freebsd-current@freebsd.org Subject: RFC: powerd Patch & proposed future changes Message-ID: <18510.213.150.228.38.1246864978.squirrel@mail.magicbooks.org>
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Hi! Yesterday i submitted a patch for powerd to set maximum allowed CPU speed for adaptive modes (to keep the system cool and using less power). PR: 136354 Would it also make sense to have powerd run an (optional) user configureable script on ac state change? I'm thinking about things like dimming TFT backlight, on EEE PC turning of the webcam and so on. Another option that could make sense in powerd is checking the battery state and running a user configureable script when ac-state is set to battery and battery falls below a configured threshold. The script could do a number of things like warning the user, scheduling a shutdown and so on in order to give the user a fair chance to save his/her work and do a clean shutdown (or just plugin the ac adapter). powerd currently only adjusts CPU speed, but having a *second* programm monitor the same kernel variables to work on another part of the same problem does not seem to make sense. BTW, i'm also thinking of having the option to have powerd log the battery status (ac mode + load + charge level) every 5 Minutes or so to syslog. That way, a second script (log parser) may be able to determine information about the battery - like how long does it take to charge, rough capacity estimation and possible degradation of battery. Just throwing ideas... LLAP & LG Rene -- Hackerkey: http://tinyurl.com/pof37z
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