Same issue here. Machine hangs hard about once every 24 hours.
Mouse is NOT responsive - can not move or click the mouse. Keyboard is NOT responsive. Can not Ctrl-F1. Can not Magic SysRq. Intel Core i5 3570K 3.4GHz LGA 1155 Processor Intel Core i5 3570K 3.4GHz LGA 1155 Processor ASUS P8Z77-V LGA 1155 Z77 ATX Intel Motherboard Crucial 16GB DDR3-1600 (PC3-12800) CL9 Dual Channel Desktop Memory Kit (Two 8GB Memory Modules) Using the I5's internal GPU. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/993187 Title: ubuntu 12.04 64bit completely freezes frequently To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/993187/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs