Re: Emacs 31: Issue with C-x binding in comint.el

> Date: Mon, 15 Jun 2026 19:13:13 +0200
> From: aitor <[email protected]>
> 
> In Emacs 31, `comint.el` maps "C-x up" to `comint-complete-input-ring`, which breaks my setup. I globally bind "C-x up" to `windmove-up`, but the comint mapping prevents me from using "C-x up" in shell mode. I've solved this by adding the following to my `init.el`:
> 
> ```elisp
> (with-eval-after-load 'comint
>   (define-key comint-mode-map (kbd "C-x <up>") 'windmove-up))
> ```
> 
> However, my understanding was that major modes should avoid using the C-x prefix. In fact, mode-specific commands are usually prefixed with C-c, as are all the bindings in `comint.el`, except for this one.
> 
> Should I report this as a bug?

There's a convention to avoid binding "C-c LETTER", but I'm not aware
about avoiding "C-x SOMETHING".  Where did you see that convention?