The problem seems to have been caused by the "/" partition becoming unmounted. Tested disk(crucial M4 SSD 128GB) using "partition magic" and found nothing wrong. I've reinstalled ubuntu using and identical disk and so far everything works so closing bug.
** Changed in: unity (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/1048250 Title: unity desktop becomes unusable after 1 hour To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/unity/+bug/1048250/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs