> Just to check, you're suggesting that I bisect from emacs-29.3 (I use that > tag because it's what the version of 29 I'm using is built from) to master > HEAD, to find at which commit C-x 5 2 opens a small window immediately > (without disabling menu-bar-mode)?
That's the idea, yes. > This made no difference. I added just: > > (add-to-list 'default-frame-alist '(user-size . t)) > > to ~/.config/emacs/early-init.el > > Then I ran each Emacs with just "emacs", confirmed that default-frame-alist > was set, then disabled menu-bar-mode (Emacs 29 only), then C-x 5 2. In each > case a small window was opened as before. I had no hope that this would help. martin