We tried it according to the order recorded in #14, and post/attach the output. Please refer to the attachment for details.
After installing the missing package gir1.2-polkit-1.0 with [sudo apt- get install gir1.2-polkit-1.0] command and executing the [sudo dpkg -i python3...] command again, system-config-printer 1.5.9 can be successfully installed. After executing these commands, we can start system-config-printer normally. However, the notifications is still displayed. ** Attachment added: "InstallErrorInfo-20181111.txt" https://bugs.launchpad.net/ubuntu-mate/+bug/1656790/+attachment/5211659/+files/InstallErrorInfo-20181111.txt -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1656790 Title: print-notifications: Don't show error for job in progress To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-mate/+bug/1656790/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs