Comment 65 for bug 1008197

I am still occasionally experiencing this problem (or something that looks just like it) in 2020. In my case, the freezing happens only when the Cinnamon screen saver is active -- the date/time on the screen saver stops advancing, and no keys or mouse clicks will revive it -- even selectively killing processes on the computer via a remote login (ssh) doesn't work -- I end up with no choice but to do a hardware reset.