When it is in black cross mode I can't click on anything and have to do a hard reboot to fix the issue.
Please see a picture of the issue here:
23 Answers
I have the same issue and can't find a solution for it.
Doesn't solve the black cross directly, but it makes a very quick system reset:
sudo service dbus restart As a temporary resolve to the issue you can type in the Terminal sudo service lightdm restart which should work.
According to M. Tarun, gnome-tweak-tool -> appearance tab -> change your cursor theme Cursor also works.