The solution proposed by Agustin seems to work for me - at least, I suspended and resumed twice and everything seems to work fine for the moment. But shouldn't the grub option be
acpi_osi='!Windows 2012' instead of acpi_osi=Windows 2012 ? -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/971061 Title: acpi reports battery state incorrectly To manage notifications about this bug go to: https://bugs.launchpad.net/acpi/+bug/971061/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs