>>>>> On Mon, 19 Nov 2018 22:02:44 -0300, Sébastien Grenier <se...@koumbit.org> 
>>>>> said:

    > I suspect the problem is with this script...
    > 
https://github.com/faiproject/fai-config/blob/master/class/40-parse-profiles.sh

I also think that the problem is there.
Can you try to write the value of the variable $out (which is the
output of the command tty) to a file and see if it is set correctly?

-- 
regards Thomas

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