In Emacs 24.4.1 I do not notice any tool tip information. The *Completions* buffer appears after the M-?. The message buffer has "Type SPC to continue editing." message which I believe comes from the verilog-mode.el code. When the mouse is over the word "initial", in *Completions* buffer, the word is highlighted. I do not notice any other tool tips or other messages. The CPU does not runaway until some event occurs (any mouse click or key stroke) It appears that whatever input is pressed, the CPU runs away, and the keystroke itself is lost. The *Completions* buffer disappears, and editing can continue. Left unchecked, the runaway process consumes all memory and eventually emacs crashes, but it is not "immediate". Other editing seems to work fine. Ian On Sat, Jun 25, 2016 at 3:00 AM, Eli Zaretskii > wrote: > > From: Ian Perryman > > > Date: Fri, 24 Jun 2016 16:02:00 -0400 > > > > The original post with the inline dribble files did not seem to work > well for the control characters. > > > > I am going to try attaching the files rather than inline them. > > When this happens, do you see some tooltip displayed at mouse pointer? > If so, what happens if you move the mouse pointer from that position > to some other? >