reporting "battery critical" when almost full

[Chris Myers]

The battery life tool is incorrectly predicting the life of the battery in Ubuntu 11.10.

This causes an unwanted shutdown when the laptop has plenty of power left. It has done this immediately after pulling the power out of the back of the laptop - My battery is not faulty.

Some info about my system:

root@Lenovo:~# cat /proc/acpi/battery/BAT1/info
present: yes
design capacity: 5100 mAh
last full capacity: 5100 mAh
battery technology: rechargeable
design voltage: 11100 mV
design capacity warning: 420 mAh
design capacity low: 156 mAh
cycle count: 0
capacity granularity 1: 264 mAh
capacity granularity 2: 3780 mAh
model number: PA3465U
serial number: 3658Q
battery type: Li-Ion
OEM info: COMPAL

root@Lenovo:~# cat /proc/acpi/battery/BAT1/state
present: yes
capacity state: ok
charging state: discharging
present rate: 0 mA
remaining capacity: 2703 mAh
present voltage: 11100 mV

root@Lenovo:~# cat /proc/acpi/battery/BAT1/alarm
alarm: unsupported

I am unsure whether this is helpful. Please let me know if I can do anything else.

Many thanks,

Chris.

[Chris Myers (chris-ascent)]

Someone has blogged about this & has a potential cure:

http://hughsient.livejournal.com/5884.html