The problem is in /root/.profile file. At the end of that file you have: Code: mesg n But it doesn’t works in graphical mode because (taken from man mesg) “mesg assumes that its standard input is connected to your terminal”. Change it to: Code: if `tty -s`; then mesg n fi Fonte: https://cristhianizaparedes.wordpress.com/2016/12/23/error-when-found-when-loading-root-profile-stdin-is-not-a-tty/