I downgraded gnome-control-center in my Cosmic installation to version 1:3.28.2-0ubuntu0.18.04.2, and then Intelligent Pinyin was shown as one of the Chinese input source options as expected. So item 2 above is most likely a gnome-control-center issue.
Assuming for now that the main issue is an installer problem. ** Also affects: ubiquity (Ubuntu) Importance: Undecided Status: New ** Changed in: ubiquity (Ubuntu) Importance: Undecided => High ** Changed in: ubiquity (Ubuntu) Status: New => Confirmed ** Changed in: gnome-control-center (Ubuntu) Importance: High => Medium -- You received this bug notification because you are a member of Ubuntu Desktop Bugs, which is subscribed to gnome-control-center in Ubuntu. https://bugs.launchpad.net/bugs/1786344 Title: Default IBus input method ignored in live session To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-control-center/+bug/1786344/+subscriptions -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs