After using x11vnc for a while, I find that I cannot type some (or any) characters or my mouse clicks and drags no longer have any effect, or they lead to strange effects. What happened?
Probably a modifier key, e.g. Control or Alt is “stuck” in a pressed down state. This happens for VNC in general by the following mechanism. Suppose on the Viewer side desktop there is some hot-key to switch desktops/rooms/spaces, etc. E.g. suppose Alt+LeftArrow moves to the left desktop/room/space. Or suppose an Alt+hotkey combination iconifies a window. This can leave the Alt key pressed down on the remote side. Consider the sequence that happens. The Alt_L key and then the LeftArrow key go down. Since you are inside the viewer the Alt_L key press is sent to the other side (x11vnc) and so it is pressed down in the remote desktop as well. (by “Alt_L” we mean the Alt key on the left-hand side of the keyboard.) Your local desktop (where the VNC Viewer is running) then warps to the new desktop/room/space: Leaving the Alt_L key still pressed down in the remote desktop. If someone is sitting at the desktop, or when you return in the viewer it may be very confusing because the Alt_L is stil
