Trying to add some information: the bug persisted on 2.6.15-27 but when downgrading the BIOS version from F.08 to F.06, sometimes battery status works.
I don't know exactly why, other times, acpi battery status remains constant just after starting the computer. Juan Manuel Gimeno -- ACPI-battery monitoring stops working after some time https://launchpad.net/bugs/47561 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
