Arduino micro recognized only once by Linux Mint

Hello,

I have plugged an Arduino Micro on a Linux Mint machine. I got problems in recognizing the board, which I have solved following this post with sudo systemctl stop ModemManager.service.

But today, when I plugged the board again, it was not recognized at all, as in no port was identified by Arduino IDE.

Is this a problem of setting? A bad USB?

Thank you