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I'm trying to write some exotic characters, like ĵ, ĉ or ŭ. I am using a qwerty US keyboard layout on a GNU linux machine, and I set up my compose key with setxkbmap -layout us -option compose:ralt. This works flawlessly almost everywhere, including when using Emacs from a terminal with emacs -q -nw. I can write words like "ĵaŭdo" ("thursday" in Esperanto), no problem at all.

But when I try to input the compose sequence corresponding to one of those characters using Emacs in GUI mode with emacs -q, nothing happens. Clearly, Emacs GUI understands my compose key, as I can use it to write french characters like "déjà". Furthermore, it does not seem to be a character set issue: If I write "ĵaŭdo" in a text file, and open this file from Emacs GUI, it renders those characters just fine.

Does anybody know what is going here? (emacs --version GNU Emacs 28.1)

chpill
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  • What does C-h k say when you give it one of the character that don’t work? Also, you’re not using an input method so that tag isn’t appropriate. – db48x Jul 29 '22 at 21:03
  • @db48x I changed the tag to characters, thank you for letting me know.

    When I input C-h k, I see the prompt in the minibuffer after Describe the following key, mouse click, or menu item:. When I input compose ^ j, absolutely nothing happens, the prompts remains waiting. It's like I had input nothing. If I input compose ^ e, then the minibuffer immediately shows me ê is undefined.

     – chpill Jul 29 '22 at 22:44
  • Sounds like it’s a prefix character. Type it and then type C-h and it will show you what keymap it is a prefix for. Include that information in your question; it’ll probably be helpful. – db48x Jul 29 '22 at 22:46
  • @db48x Again, when I press compose ^ j or compose u u, then C-h, it behaves like I had input nothing, and just pressed C-h alone (it opens the help prompt in the minibuffer). It does not open a panel like when I type C-x C-h. This is very weird – chpill Jul 30 '22 at 20:46
  • In that case, Emacs didn’t receive any keyboard input at all. Your OS did something with the keys and never sent them to Emacs. – db48x Jul 30 '22 at 22:32
  • Same here. Not a OS thing. Running emacs 27.1 it works as expected: AltGr+ù (on my Italian keyboard) makes the "composing" appear (waiting for the char to be composed with), then I hitiandìappears (accent composed withi). In emacs 28.2, AltGr+ù makes the appear, as before, but when I hit i… no ì is written: the final result is as if I had never typed anything. – ShinTakezou Dec 11 '22 at 16:53

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