= Unable to lock screen on Ubuntu
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Happened on <ciro santilli s hardware/P14s> on <Ubuntu 23.10>, which started with fresh Ubuntu 23.10 install.
However it did not happen on <ciro santilli s hardware/Lenovo ThinkPad P51 (2017)> also on <Ubuntu 23.10> which had been upgraded several times from God knows what starting point... At first one had X11 (forced by <Nvidia> drivers) and the other Wayland, but moving to p14s X11 changed nothing.
Both were running <GNOME Display Manager>.
Same happens with Super + L, but also CLI commands: https://askubuntu.com/questions/7776/how-do-i-lock-the-desktop-screen-via-command-line
Bibliography:
* https://askubuntu.com/questions/1242110/after-upgrading-to-ubuntu-20-04-lockscreen-not-working canon
* https://askubuntu.com/questions/1246622/ubuntu-20-04-unable-to-lock-screen
* https://askubuntu.com/questions/1245071/cant-lock-screen-with-shortcut-on-ubuntu-20-04-gnome
* https://askubuntu.com/questions/1248756/super-l-not-working-on-ubuntu-20-04