Ubuntu18.04 solve the "Dash to dock" shows on lockscreen

 

 

 

 

 

 

solved the issue by removing default ubuntu-dock@ubuntu.com:

$ sudo mv /usr/share/gnome-shell/extensions/ubuntu-dock@ubuntu.com ~/

 

Reboot your computer.

 

Reference

https://github.com/micheleg/dash-to-dock/issues/649

https://github.com/micheleg/dash-to-dock/issues/726