I could not reproduce the bug under vanilla 4.6.1 with nvidia backports. The powertop still reports max package C3, no deeper states though.
** Tags added: kernel-fixed-upstream -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1573700 Title: Kernel instability To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1573700/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs