[Frotag]

I've had the opposite problem with laptops. There's like 3 different menus to configure sleep-on-idle but none of them actually let you disable it even if they claim they do.

They don't even share the same state and can be set to conflicting values, with the oldest looking one usually taking priority.

Disabling screen timeout is even worse since there's additionally the screensaver settings to muddy the waters.