Hello. After updating from 15.1 to 15.2 exiting the sleeping mode provides black screen on the first attepmpt and after I reset the GUI with Ctrl+Alt+Backspace and logging in, the Plasma doesn’t launch while other autoloaded apps are ok.
It’s not really a satisfactory solution, but maybe you could try using
kquitapp5 plasmashell
kstart5 plasmashell
in a Konsole window to restart it manually.
I have to use
xrandr --dpi 96
and then restart the desktop because my television lies to my GPU and tells it that the screen is something ridiculous like ~2.5 Metres wide, which causes the DPI to drop to ~30 and makes text illegible. I just haven’t bothered trying apply a proper solution until I solve some other problem I’m having with my GPU, so I just keep these commands in a file on my desktop so I can copy and paste them into Konsole after starting up.
It’s not a particularly good solution, I know, but hopefully it’ll do until someone posts a proper solution.