Created attachment 847361 [details]
/var/log/plymouth-debug.log
Thank you for those instructions and your patience, Cliff. Much appreciated.
This is my primary machine, my notebook, and rebooting is tricky due to all
the things that tend to be open. I hope the log files prove useful and you
can reproduce (and fix?) the display issue. Let me know if I can be of any
further help and I'll do my best!