Hi, On Friday 20 July 2012 16:13:56 Matthias Apitz wrote: > El día Friday, July 20, 2012 a las 03:45:23PM +0700, Erich Dollansky escribió: > > > > ... > > > 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. > > I wrote and used something similar for my netbook EeePC 900; it turned > out that the battery is not showing the remaining capacity in a linear
this is also true on the X220. > way; the last 5% are 'consumed' in a few seconds, i.e. below 20% I > polled every 2 seconds; I did some tests until I ended at the 2%. There was always enough energy left in the battery to restart the machine. I wonder anyway how they do it. I developed battery monitors a long time ago. As the voltage drop is not linear and the tolerances are very high. They might calibrate each battery when it reaches certain levels. Erich _______________________________________________ freebsd-current@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-current To unsubscribe, send any mail to "freebsd-current-unsubscr...@freebsd.org"
