Re: Mysterious Ubuntu 12.04 Total Freeze
I had frequent freezes like that. For me the problem had to do with my Intel Ivy Bridge CPU I think. I updated the kernel to a later version then the stock version and problem disappeared. There is quite a bit of info on how online.
MB: Asrock Extreme4-M CPU: Intel(R) Core(TM) i7-3770K CPU @ 3.50GHz Memory: Corsair Low Profile Vengeance 16.00 GB. GC On CPU HD4000 Platform: x86_64 Distribution:Ubuntu 16.04 Xenial Xerus with Cinnamon DE Boot: EFI File System:EXT4