KDE VNC Termination
Attempting to connect to a remote system running KDE always abruptly terminated the
x11vnc server when hovering the mouse pointer over any icon on the panel. The
x11vnc server could be restarted using SSH, but the way the process terminated rendered any VNC connection unusable.
Changing the remote desktop to Trinity Desktop Environment (TDE) or Xfce did not result in the same abrupt termination. VNC sessions with
x11vnc have been stable for many years in the house network. The problem seemed specific to KDE.
Searching the web found an oddball
noxdamage option for
x11vnc. The option never had before been needed or used in the house network, but using that option resolved the problem.
There are related options,
xd_mem, that remain untested.
What causes the abrupt termination is unknown.
Problem solved but Yet Another Example why updating computers is so frustrating.
Something always breaks. Always.