I confirm the bug with my Kubuntu install (16.04). The vnc client does not refresh the windows but the mouse and keyboard do interact with the server.
I tried to launch krfb manually and here is the cmd log: found plugin at "/usr/lib/x86_64-linux-gnu/qt5/plugins/krfb/krfb_framebuffer_x11.so" Loaded plugin with name "x11" found plugin at "/usr/lib/x86_64-linux-gnu/qt5/plugins/krfb/krfb_framebuffer_qt.so" Loaded plugin with name "qt" Using FrameBuffer: "x11" Got image. bpp: 32 , depth: 24 , padded width: 10240 (sent: 10240 ) Pass a valid window to KWallet::Wallet::openWallet(). cannot find .rc file "krfbui.rc" for component "krfb" Starting server. Listen port: 5900 Listen Address: "0.0.0.0" Password enabled: true Could not resolve property : linearGradient4538 Could not resolve property : linearGradient4588 Could not resolve property : linearGradient4554 Could not resolve property : linearGradient4572 Could not resolve property : linearGradient4532 Could not resolve property : linearGradient4582 Could not resolve property : linearGradient4566 Could not resolve property : linearGradient4548 Could not resolve property : linearGradient4532 Could not resolve property : linearGradient4582 Could not resolve property : linearGradient4566 Could not resolve property : linearGradient4548 Could not resolve property : linearGradient4532 Could not resolve property : linearGradient4582 Could not resolve property : linearGradient4566 Could not resolve property : linearGradient4548 disconnected from socket signal about to start autentication about to start autentication -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1578081 Title: Krfb and VNC disfunction To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/krfb/+bug/1578081/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs