I have two method to lock my screen. One is to close just the cover from my T480. And the second is to just press and hotkey.
I use the i3 own screenlocker tool i3lock. It is really soild and only do the needful. Nothing more no bloat.
There the basic i3lock command I use:
i3lock -i ~/.config/i3/lock.png -f
- -i give the picture shown from i3lock
- -f show the number of failed attempts
Lock i3 with hotkey
I simply bind the lock function to F12. So I am able to really fast lock the computer, just by pressing one key. For that I just add one line to my i3 config file.
bindsym F12 exec i3lock -i ~/.config/i3/lock.png -f
Lock i3 by close the cover
Do do this I just created a systemd service that always run if the laptop goes to sleep state.
[Unit] Description=i3lock Before=sleep.target [Service] User=USERNAME Type=forking Environment=DISPLAY=:0 ExecStart=/usr/bin/i3lock -i /home/USERNAME/.config/i3/lock.png -f [Install] WantedBy=sleep.target
To activate the service run:
systemctl enable i3lock.service
This method will only be used for single user systems, because I use a gloabl systemd unit