I think I have had the same problem. I was able to force the error with the tool 'memtester'. Finally I figured out that after I changed the Memory Frequency Limiter in BIOS form 'AUTO' to one of the lowest levels my system run stable.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1321240 Title: [Lenovo IdeaPad Y510P] System Freeze on High Memory usage To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1321240/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs