I installed UPower 0.9.8 (released on 07-Jan) from freedesktop. it include a fix for this problem: "Support the power_now sysfs attribute to get time remaining on new kernels (Richard Hughes)" It works.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/531190 Title: upower (devkit-power) reporting bad data when AC cable is unplugged -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
