Date: Fri, 20 Jul 2012 15:45:23 +0700 From: Erich Dollansky <erichfreebsdlist@ovitrap.com> To: Lars Engels <lars.engels@0x20.net> Cc: freebsd-current@freebsd.org Subject: Re: Script to monitor battery status on X220 Message-ID: <201207201545.23915.erichfreebsdlist@ovitrap.com> In-Reply-To: <20120720053108.GD70259@e-new.0x20.net> References: <201207201004.59451.erichfreebsdlist@ovitrap.com> <20120720053108.GD70259@e-new.0x20.net>
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Hi, On Friday 20 July 2012 12:31:08 Lars Engels wrote: > On Fri, Jul 20, 2012 at 10:04:59AM +0700, Erich Dollansky wrote: > > Hi, > > > > I forget yesterday to share these two scripts: > > > > http://www.alogreentechnologies.com/freebsd/checkbattery > > > > checks the battery status of an X220 and shuts the machine down when the battery falls to 2% or below. > > > > The status is checked every minute. > > > > It calls the following script to shut the machine down: > > > > http://www.alogreentechnologies.com/freebsd/poweroff > > > > You must run the first script as root to enable it to power the machine off at the end. > > > > I found that the battery life of my machine was higher using a simple window manager like blackbox compared to things like GNOME or KDE. This might depend on the usage pattern. > > > > Erich > > Is it necessary to poll? Usually devd generates an event when the > battery status and/or percentage changes. Just read the events from > /var/run/devd.pipe. > this is a good idea. I did not like this solution either but did not get a better idea when I did it. Erich
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