So: caps lock causes led to turn on, red colour, which is quite useful. Nothing else seems to do anything, however.
Oh well, no worries. As you said, my responsibility for leaving the reservation but, just to experiment, I did try using lxqt for a few days this week. I did not see anything other than the red light ever. I'm using the kernel from 31 January 2019. I wonder what I am not doing correctly even when on the reservation?