I tried to add systemd.debug-shell=1, and switched to tty9 when the installation was done and switched back to tty1, then the message "Please remove the installation medium,then reboot" shown up.
Next step, I tried to send message via "plymouth message --text= ", but the messages didn't be updated. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1865161 Title: Written "press return to shutdown the computer" does not appear. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/casper/+bug/1865161/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs