Upstream commit 53fd544c grabs mouse on X platforms which is a derivation from whats done on Window platform. The problem it introduces is that if one is running multihead setup with ThinLinc client fullscreen on only one monitor and the local desktop on the other. One can't "ungrab" the capture of mouse / keyboard when clicking on the local desktop and is forced to switch out from fullscreen mode using F8 menu. This works as expected when using the Windows client. One possible solution might be hooks for mouse leave which "ungrabs" the mouse. Ungrabbing the keyboard might introduce some strange behaviors.
Moving from NearFuture to --- for discussion.
Fixed upstream in: https://github.com/TigerVNC/tigervnc/commit/7e546febadb6e6cc66138c2316c8c19ca8aab2b1
> * When running linux ThinLinc client on one screen in > fullscreen, you should not need to exit fullscreen > to work with the local desktop on the other screen. > Works as expected just like Windows client.
