#'clim-internals::port-query-pointer for clx-port missing
The following method is needed by CLIM to fetch the position of the mouse. It is missing from clx-backend.
It's a function of
(port sheet) -> (values x y native-x native-y &optional root-x root-y), where
root-y seems to be also returned by ACLPC implementation, but ignored by CLIM.
Workaround I used in REPL to side-step the problem:
(defmethod clim-internals::port-query-pointer ((port clx-clim::clx-port) sheet) (values 10 10 10 10))