Thank you, Lallement. Although I have used ubuntu for almost two years, I have few skills with it. I understand your advice in such a way: first I removed Xorg in the terminal. Then I selected the official supported repository, and installed Xorg again. Finally I reboot the laptop, and upgrade with the update-manager again, but it failed to upgrade to 18.04 again with the same warning information.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1791020 Title: Fail to upgrade to 18.04LTS from 16.04LTS To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ubuntu-release-upgrader/+bug/1791020/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
