Comment 4 for bug 1720184

> As regards "IBUS_ENABLE_SYNC_MODE=0", how serious do you consider the issue

Sorry, I don,t know how serious.
At least, my environment is no problem.

As following link, Android Studio users are use "IBUS_ENABLE_SYNC_MODE=1" to avoid IBus+Java problem.
However it seems that it will be fixed IBus 1.5.11 and lator.

https://askubuntu.com/questions/746119/upgrade-ibus-or-export-ibus-enable-sync-mode-1-to-fix-intellij-android-studio

IBUS_ENABULE_SYNC_MODE=0 means that ibus uses async process keyevent API.
I worry that this change will be acceptable final freeze exception.