Ubuntu used a patch for this, but it's just a work-around for now and multiple upstream's developers told me that is not the right approach to use. -- debbug#555134 ...
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ID Status▲ Resolution Sev Product Comp Assignee▲ Reporter Summary▲
40374 REOP --- nor Sisyphus x11vnc-g antohami vercha Запустить X11VNC Server из меню приложений -> Включить чекбокс TightVNC -> The x11vnc program failed to start

File a new bug in the "x11vnc-gui" component of the "Sisyphus" product