Perhaps, problem in using realtime kernel. I've back generic kernel and my shutdown works properly, also suspend to ram and disk works properly. I'll test it while and will write here about results. Why I think on rt-kernel? In attachments in syslog can be found BUG: entries. With generic kernel I do not see it.
** Attachment added: "bug.log" http://launchpadlibrarian.net/19562290/bug.log -- KUbuntu 8.10 Intrepid freezes machine after some time of inactivity https://bugs.launchpad.net/bugs/296306 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs