Le 02/09/2019 à 13:42, Pétùr a écrit : > After upgrading my Debian sid this morning, I cannot use anymore my > external screen (plugged into a Dell WD15 dock). > > My system (Xfce) sees the monitor but nothing is displayed. Ok, it works again after downgrading to sid version firmware-linux-nonfree # apt install firmware-linux-nonfree/testing Hope this will be fixed soon.