I notice that a Pi 3B+ with the offcial touchscreen display will black/power off the display the instant that a shutdown command is issued, but it appears the Pi is still busy doing some things (what?) for up to 10 seconds afterwards, as the green light on the board carries on flashing for a while
Really, I'd like the display to remain on and showing activity (some scrolling text of what is happening, like most other linux devices I'm used to) until finally the screen goes black when it truly is safe to yank the power..
Reason is I'm installing a Pi into an environment where there is a "turn off at night to save the planet" ethos, and they shut down machines and then hard flick a switch that cuts the power. I'm concerned that even if I can get them to hit the "start.. shutdown" option (from what I see they just reach shift end and power the windows PCs off by cutting the AC), they'll then cut the power while the Pi is still flushing something to disk and I'll then get a call saying "uhh.. it won't start up.."
So, is there any way to keep it "on and looking like it's busy" until it truly isn't?