I confirm that adding the option acpi_osi='!Windows 2012'
to GRUB_CMDLINE_LINUX_DEFAULT in /etc/default/grub at least makes the lid close suspension behave correctly. It's been two weeks since I made that change, I suspended and rebooted several times, and still when I close the lid the suspension works fine. Just to make it clear, and if you want to try it yourself, you should open /etc/default/grub with your text editor (and with sudo privileges) and replace the line starting with GRUB_CMDLINE_LINUX_DEFAULT with the following: GRUB_CMDLINE_LINUX_DEFAULT="quiet splash acpi_osi='!Windows 2012'" It would be nice to know if this solution works for other users as well. -- 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