Ubuntu 19.04 lock screen freezes when arc menu is installed
The default lock screen is set to Super + L When arc menu is installed and ubuntu lock screen is attempted with 'Super + L' the system locks but there is no way to unlock it. You can never unlock the system by sliding the screen up. You need to enter safe mode by Ctrl + Alt + F2 and unlock and logout to get things working. I think the super key being linked to arc menu is causing the issue. After changing the lock screen key from 'Super + L' to 'Ctrl + Alt + L' the issue goes away and able to lock and unlock screens.