This could be Onboard crashing on something. If so, there should be an error message + traceback in /var/log/lightdm/.
Does this print anything interesting? sudo su zgrep -i onboard /var/log/lightdm/*
This could be Onboard crashing on something. If so, there should be an error message + traceback in /var/log/lightdm/.
Does this print anything interesting?
sudo su
zgrep -i onboard /var/log/lightdm/*