under “Settings > Privacy & Security > Screen Lock” I can configure “Blank Screen Delay” and “Automatic Screen Lock”.
I have an OLED and want to set “Blank Screen Delay” to 5min, but since I’m mostly working at home with my Laptop, I want to set a “Screen Lock Delay” to something like 15min.
I don’t see an option how to do this. Can this be achieved?
Via terminal you make use of the gsettings command, or you can also use dconf-editor to add custom values.
Timeout for blanking the screen (seconds; 0 = never), for 5 minutes then is:
gsettings set org.gnome.desktop.session idle-delay 3600
But that is already available in the dropdown.
Timeout for locking the screen after blanking (seconds; 0 = instant), so in your case, to have extra 15 minutes after blank, you run from terminal:
gsettings set org.gnome.desktop.screensaver lock-delay 900
But for whatever reason it might not come up as a value in the dropdown menu in the Settings … and it might get reset to 0.
Best to use the values that are available, so probably 30 minutes will be fine for you.