I had a sles11sp2 out-of-the-box install running - worked perfectly incl. remote administration on VNC.
Recently I added all "Needed updates" from online update. Now I am only able to connect on ssh, no remote administration on VNC.
I tried to disable and re-enable from yast, but no change.
The system is running in a secure environment with local (own) firewall disabled.
netstat -lpdn | grep 5901
tcp 0 0 127.0.0.1:5901 0.0.0.0:* LISTEN 14252/qemu-dm
lsof -i | grep 5901
qemu-dm 14252 root 22u IPv4 32643 0t0 TCP localhost:5901 (LISTEN)