I'm having the exact same problem after upgrading to Karmic. I've used Ubuntu since Feisty and this is the first time I ever experienced problems with X forwarding on SSH. It worked fine on Jaunty. Basically I'm experiencing the same issues as reported:
$ env | grep DISPLAY $ echo $DISPLAY $ xclock Error: Can't open display: $ tail /var/log/auth.log Nov 5 09:34:11 ed-linux sshd[10567]: Accepted password for ed from xx.xx.xx.xx port 47676 ssh2 Nov 5 09:34:11 ed-linux sshd[10567]: pam_unix(sshd:session): session opened for user ed by (uid=0) Nov 5 09:34:13 ed-linux sshd[10678]: error: Failed to allocate internet-domain X11 display socket. Nov 5 09:34:21 ed-linux sudo: ed : TTY=pts/0 ; PWD=/home/ed ; USER=root ; COMMAND=/usr/bin/apt-get upgrade Nov 5 09:35:01 ed-linux CRON[11340]: pam_unix(cron:session): session opened for user root by (uid=0) Nov 5 09:35:01 ed-linux CRON[11340]: pam_unix(cron:session): session closed for user root $ cat /etc/ssh/sshd_config | grep X11 X11Forwarding yes X11DisplayOffset 10 -- X11 forwarding via SSH does not work after upgrade to karmic https://bugs.launchpad.net/bugs/434799 You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to openssh in ubuntu. -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs