> From: Bostjan Vilfan <bjvil...@gmail.com> > Date: Sat, 20 Jul 2019 14:50:14 +0200 > > Thanks for your reply. Here are the answers to your questions: C-h l results > in C-down-mouse-3- on the > message line; the emacs version is 26.2 ; emacs -Q results in the same > behavior ( C-down-mouse-3- ) on > the message line. By the way in trying to reproduce the problem when > answering your post I noticed I had to > provide a lot more inputs before the Edit menu appeared. Another > observation: I am not even 100% sure that > emacs is the culprit; namely, in this situation (use of internal screen) I > sometimes get erratic movements of > the cursor during which some part of the text gets changed; this type of > behavior was observed at least in one > other situations (during the reading of mail in the Firefox window).
I suspect some software unrelated to Emacs is installed on your laptop which kicks in after several C-s keypresses. Otherwise, I see no way of explaining how did C-down-mouse-3- appear.
