Variable: cua-check-pending-input
cua-check-pending-input is a customizable variable defined in
cua-base.el.gz.
Value
t
Documentation
If non-nil, don't override prefix key if input pending.
It is rumored that input-pending-p is unreliable under some window
managers, so try setting this to nil, if prefix override doesn't work.
Source Code
;; Defined in /usr/src/emacs/lisp/emulation/cua-base.el.gz
(defcustom cua-check-pending-input t
"If non-nil, don't override prefix key if input pending.
It is rumored that `input-pending-p' is unreliable under some window
managers, so try setting this to nil, if prefix override doesn't work."
:type 'boolean)