Re: menu-bar-mode makes frame continuously shrink in height

[Po Lu <luangruo@yahoo.com>]

PierGianLuca <luca@magnaspesmeretrix.org> writes:

> Hi everyone,
>
> Emacs 29.1 on Ubuntu 20.04 here. Emacs was installed from tarball with options:
> --with-native-compilation --with-json --enable-link-time-optimization --with-x-toolkit=lucid --without-toolkit-scroll-bars
>
>
> I see a curious behaviour from calling "menu-bar-mode" and "tool-bar-mode". Before submitting it as a bug I wanted to ask here if it's something known, or if not how I can track the source of the problem myself.
>
> I have frames set at height=77 in "default-frame-alist", and "menu-bar-mode" and "tool-bar-mode" both set to nil (all via Customize).
>
>
> (A) If I call "M-x menu-bar-mode", the menu bar appears, and the frame
> shrinks vertically by one line. If I call "M-x menu-bar-mode" again,
> the menu bar disappears, and the frame shrinks vertically once
> more. So the more I make the menu bar appear and disappear, the more
> the frame shrinks.
>
> I tried adding and removing "menu-bar-lines" in "frame-inhibit-implied-resize", but the problem remains either way.
>
>
> (B) Exactly the same problem with tool-bar-mode. There's one difference here:
>
> this continuous-shrinking behaviour happens if "tool-bar-lines" is in
> "frame-inhibit-implied-resize". Otherwise, the frame increases in
> vertical size when tool-bar-mode is enabled, and decrease to the
> original size when tool-bar-mode is is disabled. (This seems to me
> contrary to what's explained under "tool-bar-lines".)
>
>
> (C) If I call Emacs with "-Q" (no init file), the continuous shrinking does *not* happen with menu-bar-mode – but it *does* happen with tool-bar-mode.
>
>
> This makes me think that there's both a bug somewhere, but also something strange in my init file.

More likely, your window manager is imposing stringent size requirements
pursuant to the resize increments Emacs has requested.  Do frames
continue to shrink after setting frame-resize-pixelwise to t in
early-init.el?