It looks as I fixed the problem by changing the overclocking of memory in BIOS. It was set to 'AUTO' and I changed the setting to one of the lowest values.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1137817 Title: [ivb] [WORTMANN TERRA MOBILE ULTRABOOK 1450 II] System freeze after high memory usage To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1137817/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs