I've managed to make a "ps aux" and a "top" when this was happening. I don't see anything suspicious, no process with high cpu usage, but superkaramba showed 100% cpu usage.
I had to log out and back in to get the computer working normally again. (see attachment) ** Attachment added: "output of ps aux and top" http://librarian.launchpad.net/6113461/ps_aux_and_top -- system becomes unresponsive over the day https://launchpad.net/bugs/80263 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
