It's gnome-session, starting apps with --sm-disable makes them work. When I delete the files in /tmp/.ICE-unix/ my apps start again.
Somehow gnome-session seems to be locking up. -- Unable to start applications after hibernation https://launchpad.net/bugs/49221 -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs
