Automatic screen lock not working Ubuntu 20.04
From Settings -> Privacy, I got
- Automatic Screen lock -> turned on
- Lock Screen on Suspend -> turned on
None of them locks my screen. But the manual lock option works fine. (I did get some error message about Auto-lock while installation)
Any thoughts on how to fix it? And I'm using lightdm instead of gnome-gdm3
Screen lock is disabled by default with lightdm on Ubuntu 18+ due security issues.
check more here:
- SO original question
- Bug on launchpad #1
- Bug on launchpad #2
- or just try yourself: lock screen, press
CTRL+ALT+F7and you will be back on your desktop without providing a password
You can check you display manager with: sudo systemctl status display-manager
If you still want to lock your screen with lightdm - you can use dm-tool lock. Also you can add it to keyboard shortcut as command (e.g. Super+L).
Switching to gdm3 helped: sudo dpkg-reconfigure gdm3
What's the timeout set to? Previous experience may point to a very unexpected hardware related cause which I call "mouse jitter": It could be that your mouse has a slight malfunction and 'jiggles' by itself a bit, causing your computer to stay awake. Try unplugging your mouse and see what gives.