Am 2017-12-28 13:36, schrieb Didier Kryn:
>     This file doesn't exist,

Yes, I created that myself.

> but there is a file just called lidbtn,
> which contains the following:
> ----------------
> # /etc/acpi/events/lidbtn

Is this a leftover from a former installation? Can you look if this is
provided by a package?

$ dpkg -S /etc/acpi/events/lidbtn

Jochen