Arch Linux

kabbalah

Banned

Registered: 2011-08-23

Posts: 150

Does not recognize battery

Well a greeting, I have a netbook with archlinux + gnome 3.16, this morning the netbook was shut down because the battery was exhausted and did not notice at the time, when connected to the mains and turned it on, light battery LED blinking red, and the icon appeared not in the top bar, it is as if the battery was not installed.

But if the battery is fully charged, if I disconnect it, the netbook still working time battery life.

I digit this command and this is the result

root@arch julio]# dmesg | grep batt
[    8.150530] ACPI: Battery Slot [BAT0] (battery absent)

I have not activated el buttons BBcode.

Any idea

Thanks

Trilby

Inspector Parrot

Registered: 2011-11-29

Posts: 30,480

Website

Re: Does not recognize battery

I am *far* from an expert on batteries - heck, I'm far from even being knowledgeable about laptop batteries - but I do have some related experience.

When this has happened to me, all I needed to do was a full power cycle: leave it plugged in for a good while until you are sure it should be fully charged.  Then unplug and run on battery until it dies again.  This has got a few of my batteries back in shape when I thought they were toast.  Draining the fully charaged battery is a bit of a mystery as there are no indicators at all - you just keep working/playing until it cuts out.  But after that - if your experience is like mine - everything will be back to normal.

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"UNIX is simple and coherent" - Dennis Ritchie; "GNU's Not Unix" - Richard Stallman

ewaller

Administrator

From: Pasadena, CA

Registered: 2009-07-13

Posts: 20,659

Re: Does not recognize battery

You might also try the lts kernel instead of the mainline kernel.  I have been having trouble aplenty with  4.0 and 4.1 kernels and ACPI functions. The 4.0 kernel made significant changes to when and how the ACPI subsystem was started. On my system, when the system reached the point of using passive cooling, ACPI sysfs reads would just block until the system cooled back down.  Clearly, not your problem, but the general flakyness of 4.[0,1] kernel's ACPI makes me itch.  The good news is that I built 4.2 rc5  this weekend, and many of the ACPI problems vanished.

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