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Re:Running a fake power plant on the internet for a month by krisoft on Saturday January 16, 2021 @09:53AM (#25802544)
I was thinking about that. What the OS could do is to ask for confirmation on the second keyboard. It could be something as simple as “Looks like you connected a secondary keyboard. Please type in the following random 3 numbers before it becomes active.”

If on boot it finds two keyboards it can do the same with both.

Re:Running a fake power plant on the internet for a month by ChrisMarshallNY on Saturday January 16, 2021 @10:02AM (#25802599)
> Please type in the following random 3 numbers before it becomes active.

Mac OS does something like this. If, say, I attach (via either USB or Bluetooth), a presentation remote, I'll get a keyboard identifier alert.

It isn't really anything more than an alert, though, because I can ignore the ID step, and it still works.

Re:Running a fake power plant on the internet for a month by mschuster91 on Sunday January 17, 2021 @02:30PM (#25814027)
Only for keyboards whose VID/PID combo it doesn't know and so can't associate a scancode mapping.