Did you try workaround from comment: https://launchpad.net/distros/ubuntu/+source/gnome-power- manager/+bug/60442/comments/18
-- Dual / Two Batteries, shutdown on empty expansion battery. (GPM does not recognises second battery on hotplug) https://launchpad.net/bugs/60442 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs