vncconfig: X Error of failed request: BadLength (poly request too large or internal

[Peng Yu]

vncconfig gives me the following error (on ubuntu). Could somebody let
me know what the problem is? How to fix it?

$ vncconfig
X Error of failed request: BadLength (poly request too large or
internal Xlib length error)
Major opcode of failed request: 134 (VNC-EXTENSION)
Minor opcode of failed request: 1 ()
Serial number of failed request: 65
Current serial number in output stream: 65