Can you please try with Veyon 4.7.4 again? We have some demo screen related improvements in that release.

is anyone have a solution for my problem? SHould the machines have to be in the same domain to be abble to run the wake on lan option?

Veyon is a free and open source software for monitoring and controlling computers across multiple platforms. Veyon supports you in teaching in digital learning environments, performing virtual trainings or giving remote support.

I would love to hear about a webbased option in the (near) future....

@bbs3223474 said in Keyboard lock and wake lock:

When I use veyon to demo my screen to my students, I found out the students can use Ctrl+Alt+Del or Alt+F4 to interrupt and terminate the demo session and regain control of their own devices.

Never mind, a reboot after the Veyon installation resolves it.
But I still want the wake lock though.