I am faced the same problem when I try to upgrade from 17.10 to 18.04, but after running the following commands, libp11-kit-gnome-keyring installed successfully, and my computer boot OK. So far, it is OK.
sudo apt-get remove --purge libp11-kit-gnome-keyring sudo apt-get install libp11-kit-gnome-keyring sudo dpkg --configure -a -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1765504 Title: package libp11-kit-gnome-keyring 3.18.3-0ubuntu2 failed to install/upgrade: libp11-kit-gnome-keyring:all 3.28.0.2-1ubuntu1 (Multi-Arch: no) is not co-installable with libp11-kit-gnome-keyring which has multiple installed instances To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-keyring/+bug/1765504/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
