I have a similar issue (on an MSI S271 laptop) with hardy (both amd64 and i386).
$ cat /proc/acpi/battery/BAT1/info present: yes design capacity: 17 mAh last full capacity: 12302 mAh battery technology: rechargeable design voltage: 22073 mV design capacity warning: 0 mAh design capacity low: 0 mAh capacity granularity 1: 1 mAh capacity granularity 2: 1 mAh model number: MS-1058 serial number: battery type: LION OEM info: MSI Corp. This is with the power cable plugged in and the battery fully charged: $ acpi -ba Battery 1: charging, 0%, 05:20:00 until charged AC Adapter 1: on-line $ cat /proc/acpi/battery/BAT1/state present: yes capacity state: ok charging state: charging present rate: 2304 mA remaining capacity: 14 mAh present voltage: 13377 mV With the mains unplugged : $acpi -ba Battery 1: charging, 100%, until charged AC Adapter 1: off-line $ cat /proc/acpi/battery/BAT1/state present: yes capacity state: ok charging state: charging present rate: 2555 mA remaining capacity: 25358 mAh present voltage: 1343 mV In both cases, I sometimes get instead of the proper values: $ cat /proc/acpi/battery/BAT1/state present: yes capacity state: ok charging state: charged present rate: unknown remaining capacity: unknown present voltage: 10000 mV -- Wrong battery information https://bugs.launchpad.net/bugs/218094 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs