I've also encountered this bug, first thinking it was a bug with the KDE battery indicator applet. Upower is giving incorrect energy-full values when this is happening. I've attached my 'upower -d' output from when this is happening, you can see that the energy-full values are way to high. Restarting the upower.service solves the problem.
** Attachment added: "upower output when bug occurs" https://bugs.launchpad.net/ubuntu/+source/upower/+bug/1435601/+attachment/4396660/+files/upower.txt -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1435601 Title: [vivid] After resume, upower reports critically low battery To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/upower/+bug/1435601/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
