Resetting the BIOS/CMOS (by selecting "Load Optimized Defaults") appears to have fixed this issue. 5 hours so far with no hitches (freezes). I can't imagine why any BIOS setting would cause this issue with Ubuntu but I'm optimistic about the problem being fixed.
IIRC this box is 16 months old. The only BIOS options I clearly remember tweaking were the boot order and some enable-virtualization setting. I'll continue testing for a few days and see if I can isolate a single setting that causes the issue. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/669535 Title: desktop mysteriously freezes until keyboard or mouse input -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
