Laprtop lid switch.

[Behrens, Lars (PHI)]

You could try setting

HandleLidSwitch=lock – lock when lid closed.
or
HandleLidSwitch=ignore – do nothing.
in /etc/systemd/logind.conf

e.g.
https://ubuntuhandbook.org/index.php/2020/05/lid-close-behavior-ubuntu-20-04/
and man logind.conf

-- 
Cheerz,
Lars

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