Re: Sony laptop battery has odd behavior with 2.6.26-rc3ish build.

From: Pavel Machek
Date: Fri May 23 2008 - 03:22:43 EST


> A couple days ago, I updated my test build to commit
> 8033c6e9736c29cce5f0d0abbca9a44dffb20c39 and noticed an odd behavior
> with the battery. If I unplug the power, the battery discharges and
> that is reflected in /proc/acpi/battery/BAT0/state. I am not certain
> the discharge is continuous and uniform or if it goes in steps. When I
> plug the power back in, the level stays at a constant value (+-1mAh)
> for a considerable period of time. It then does a single step back to
> the fully charged value.
> I have not done any searching to see when this began. I had been running
> the ubuntu 2.6.22-14 kernel before this and the behavior was normal.
> I am not certain what information you will need. Commit is above.

git bisect would certainly help...

> $ cat /proc/acpi/battery/BAT0/alarm
> alarm: unsupported
> $ cat /proc/acpi/battery/BAT0/info
> present: yes
> design capacity: 4800 mAh
> last full capacity: 4096 mAh
> battery technology: non-rechargeable

Because something is clearly wrong here.

(cesky, pictures)
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