Mouse cursor in VNC jumps
Started an X11VNC server on my embedded linux device and connect with a VNC client (TigerVNC or Guacamole). The VNC server streams directly the framebuffer to port 5901. The cursor jumps badly when moved over the GUI (see video).
x11vnc -rfbport 5901 -no6 -rawfb /dev/fb0 -scale 640x480x16x1280 -verbose -cursor none -nodragging -pipeinput UINPUT:direct_abs=/dev/uinput
tried lots of additional parameters without success: -pointer_mode n -extra_fbur n -visual TrueColor:32 -noshm
Solution
I suspect the problem was in the default acceleration.
Note: the default acceleration is 2.0 since it seems both X and qt-embedded often (but not always) use this value.
so the edited x11vnc command includes accel=1.0:
x11vnc -rfbport 5901 -no6 -rawfb /dev/fb0 -verbose -cursor none -nodragging -pipeinput UINPUT:direct_abs=/dev/uinput,accel=1.0 -forever
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