Dear all, I just dist-upgraded my Raspberry Pi from buster to bookworm, and while
ssh -Y... worked like a charm in before the update and I could start any X11 program over ssh, it doesn't work anymore since then. Executing ssh -Y -C -l myUser otherHostname.local -v I get ... debug1: Requesting X11 forwarding with authentication spoofing. debug1: Sending environment. debug1: channel 0: setting env LANG = "en_US.UTF-8" debug1: channel 0: setting env LC_MONETARY = "de_CH.UTF-8" debug1: channel 0: setting env LC_MEASUREMENT = "de_CH.UTF-8" debug1: channel 0: setting env LC_TIME = "de_CH.UTF-8" debug1: channel 0: setting env LC_ALL = "" debug1: channel 0: setting env LC_COLLATE = "C" debug1: channel 0: setting env LC_NUMERIC = "de_CH.UTF-8" X11 forwarding request failed on channel 0 ... From /etc/ssh/sshd_config on the server: AddressFamily inet X11Forwarding yes X11UseLocalhost no Interestingly, when connecting for the first time I got a warning: WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED! and I did just ssh-keygen -f "/home/xxx/.ssh/known_hosts" -R "otherHostname" which I did. xauth is installed on the server. What can be the reason, that I cannot use X11 forwarding anymore? Thank you. Best, Bernd