bug#48254: 28.0.50; minibuffer does not show the prompt of a command on first invocation

[Gregory Heytings]

> I can't reproduce this with 'emacs -Q'.
>
> Create '.emacs' file that contains just this single line:
>
> (add-hook 'change-major-mode-hook
>          (lambda () (set-input-method "english-dvorak")))
>
> Now start Emacs.
>
> Press 'M-x' or 'C-x C-f' or likely any other keybinding that would 
> activate minibuffer. Notice that on the first invocation the command 
> prompt does not appear in the minibuffer. The prompt appears only after 
> you have started typing command argument or pressing keybinding 
> repeatedly.

Thanks for your bug report.  It's an old behavior, the same effect can be 
seen in Emacs 24-27, except that during the first invocation you see a 
"[DV@]" in the minibuffer.  In Emacs 28 you don't see anything.

IIUC, what you want is to activate english-dvorak input method everywhere. 
To do that you can use:

(add-hook 'change-major-mode-hook (lambda () (or (minibufferp) (set-input-method 
"english-dvorak"))))
(add-hook 'minibuffer-setup-hook (lambda () (set-input-method 
"english-dvorak")))

If you don't want to activate it in the minibuffer, do not use the second 
line.

Does that solve the problem you have?