I have the same problem with the Spanish keyboard. After updating to Ubuntu 24.10 with GNOME 47 using Wayland, some keyboard key combinations don't work in certain applications anymore.
Especifically, and as you mentioned, when using AltGr+X or AltGr+Z, nothing happens in applications like Firefox, Evolution or Geary. That key combination should render « and » (Guillemets, or Spanish/French quotes) when the keyboard is set to Spanish in GNOME Settings, which is my case, and it worked well before the update. It still works as expected in other applications like Gnome Web or Libre Office. I reinstalled the affected apps, switched them between flatpak, deb and snap, rebooted the system, tried all possible combinations in both GNOME and the affected apps settings, even tried with different keyboards and devices... Nothing worked. Finally I restarted the system selecting X.Org/X11 instead of Wayland and, as it happened so many times before when something is broken, the problem was gone. So I assume the bug is, indeed, related to Wayland somehow. May I suggest changing the title of this bug report to a more general "Missing characters on keyboard under Wayland", since it also affects other language settings? Thank you. (I filed the bug under the wayland package) ** Package changed: ubuntu => wayland (Ubuntu) -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to wayland in Ubuntu. https://bugs.launchpad.net/bugs/2084189 Title: Missing characters on Norwegian keyboard under Wayland To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/wayland/+bug/2084189/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp