I've been unable to reproduce this since. It's possible installing the hibernation support made some subtle change, but after a week it seem to be stable so marking as invalid.
** Changed in: linux (Ubuntu) Status: Incomplete => Invalid -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1576571 Title: S3 suspend resume cycle every 30 minutes To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1576571/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs