ThinkPad t470s, Intel(R) Core(TM) i5-7200U CPU @ 2.50GHz.
It's also with just a few things started, CWM + one Xterm for the first test, and the second (longer) was with a web browser with three tabs open. If I have more things open I might as well go make some coffee while it unhibernates. I'm trying to poke around in log files for clues.