It happens to me neither on AC power or not, neither "Spin down hard disks when possible" checked or not. Just still happened with any combinations of this. I use Linux Mint 11. It is based on Ubuntu 11.04 with minor modifications.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/778490 Title: Random logout after upgrading to Natty Narwhal 11.04 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs