Hi @all, i can confirm that there ist a problem with the battery state. the sysctl hw.acpi.battery.life on my system goes only down NOT up again. this wrong number seems persistent during a reboot. i tested this, shortly. the battery life after reboot was 97% with power supply plugged in all the times. after a clean boot the system camed up with a battery.life of 97% ( power supply plugged in :O ). this seemed silly to me. i rebooted again. again just 97%. i pulled the plug, the battery.life is gone down one percent after some minutes and the battery.time was correct calculated. i plugged the power supply in again and the battery.life counter goes not up again. i use some time conky to monitor and display the battery data. not sure if that is related but if i have Xorg and conky running during the make world the system crashes silently. this behaviouir showed up after i configured conky to monitor the battery states. during the actual build i have disabled conky to figure if that will crash the system or something else. the system is a samsung n310 (Intel N270, 2Gig Memory) with one or two week old /usr/src. actually a new make world with updated sources is running. this will take a half day or so. :-) i detected this behavior now and it may got incorporated in the PRERELEASE/STABLE-Code in the last two month. before that time i had a right behavior, that showed correct numers for charging/discharching. i searched already in the net for solutions or sources of this behaviour. nothing related found. may be i have overlooked something? any ideas to solve this or advisories for further tests? many thanks best regards m. -- = = = http://michael-schuh.net/ = = Projektmanagement - IT-Consulting - Professional Services IT Michael Schuh Postfach 10 21 52 66021 Saarbr?cken phone: 0681/8319664 mobil: 0175/5616453 @: m i c h a e l . s c h u h @ g m a i l . c o m = = = Ust-ID: DE251072318 = = =
On Tue, Sep 25, 2012 at 7:43 PM, Michael Schuh <michael.schuh@gmail.com>wrote:> this wrong number seems persistent during a reboot. > i tested this, shortly. > the battery life after reboot was 97% with power supply plugged in all the > times. > > after a clean boot the system camed up with a battery.life of 97% ( power > supply plugged in :O ). >Sounds like normal lithium ion charger behavior to me; typically they won't kick in the charger until it reaches somewhere between 90-95% (depends on the device). This extends the useful life of the battery; raw lithium ion is just as (actually, more) prone to destruction via overcharging as other battery technologies. http://batteryuniversity.com/learn/article/charging_lithium_ion_batteriesdiscusses this. Note in particular: "A continuous trickle charge would cause plating of metallic lithium, and this could compromise safety." -- brandon s allbery allbery.b@gmail.com wandering unix systems administrator (available) (412) 475-9364 vm/sms