Initially Wayland (Switched to Xorg due to instability)
IME Used
Mozc
Test Machine
Lenovo Thinkpad A285 (AMD Ryzen 5 PRO 2500U, 8GB RAM)
2. Major Issues Found (High Priority)
We have identified critical issues related to stability and basic input/output operations when using the Japanese input method (Mozc).
A. Wayland Session Crash (Stability Issue)
The most serious problem is system instability when using the Japanese IME in the default Wayland session.
Symptom: When typing Japanese quickly, the input environment occasionally crashes. In the worst cases, the Wayland Compositor itself failed, resulting in a complete session termination (forced log out to the login screen).
Workaround: The user was forced to switch the session to Xorg to achieve a reliable and stable desktop environment, indicating a fundamental issue with the Wayland implementation.
B. Double Input and Input Lock (i18n Defects)
These are fundamental internationalization bugs that break the user experience in core OS components.
Double Character Input:
Affected Areas: The pre-installed GNOME Text Editor and the Search Field in the Settings App.
Symptom: When typing full-width Japanese characters, the system registers the input twice (e.g., typing "あ" results in "ああ").
IME Switching Lock in File Manager:
Affected Area: The file name rename dialog in the File Manager.
Symptom: It is impossible to switch the IME (e.g., from Japanese mode to English/Direct Input) within the rename dialog, making basic file management difficult.
3. Minor Issues and Usability Defects
These issues reduce the quality of the out-of-the-box experience:
Windows App Support Installation Time:
Symptom: The installation took over 10 minutes, which is significantly longer than the official estimate (2-3 minutes). This causes confusion and worry for new users.
Mozc Default Mode Reset:
Symptom: After a system reboot, the default Mozc input mode resets to Direct Input instead of retaining the user's last selection (e.g., Hiragana).
Missing System Emoji Picker:
Symptom: The OS lacks a standard system-wide emoji picker utility.
Thanks for bringing these issues to light. For those of use who are Nvidia users, we do recommend running in Xorg. Wayland is a newer implementation that everybody is pushing for reasons unknown to me, as it doesn't work for the majority of us. Regarding the rest of the stuff, the Zorin team will have to figure that out, its way beyond me.
OS version: Zorin OS 18 Core
desktop: default Wayland desktop
input: ibus-mozc
hardwares: 12th Gen Intel Core i9-12900H, Intel Iris Xe Graphics (ADL GT2)
So many issues on 18 core wayland desktop.
In my machine, ibus-mozc in wayland desktop is OK.
but one in Xorg desktop sometimes occurs chattering, doubly input.
I type "あいうえお" and press enter to display "あいうえおあいうえお".
These strange behaviours are from OLD VERSION mozc.
In Ubuntu 24.04 LTS repository, mozc is old, and the version is not compatible with wayland, so many features disabled like Usecase in conversion popup, sometimes conversion popups are shown way far from the input cursor.
So if you build the latest version of mozc yourself in your environment, all the features are OK.
But this may damge your system, yes, very dangerous.
Mozc updater from Zorin OS repository ...?
Alternative suggestion is to use fcitx-mozc.
This way is noticed as safe by many people, but in my environment, conversion popups sometimes broken.
So now I use ibus-mozc.
Another issue about Input Method:
Settings -> Keyboard -> Altering Input Source
For many Japanese users, "Different input methods for each app" is very important, because Japanese users alters English / Japanese input mode by applications.
The current version of "Different input methods for each app" option does not work for me.
I met same trouble as followings with default input method iBus-Mozc.
Symptom: When typing full-width Japanese characters, the system registers the input twice (e.g., typing "あ" results in "ああ").
sometimes occurs chattering, doubly input.
I type "あいうえお" and press enter to display "あいうえおあいうえお".
I asked the solution to Google Gemini, because I’m a ZorinOS newbie coming from Windows 10 and also I don’t know about Linux OS at all, and I’ve installed Fcitx 5 & Mozc for Fcitx. After that, those weird double inputs are gone. The changing jp-en key combination is switched from ‘Super’+’Space’ to ‘Ctrl’+’Space’ in Fcitx 5, everything is OK.
By the way, Gemini recommends me to uninstall ‘iBus & Mozc for iBus’ for avoiding the IME conflict. But ZorinOS 18 Core still warns me that ‘Langage support is not installed completely -iBus-Mozc’ when I open the Region & language settings. I suspect that is wrong suggestion since I’ll not use iBus-Mozc ever. Am I wrong?
