I had this issue as well when running anything dpkg related in the terminal, the "blindly entering your password" trick did not work for me, but I did find a fix.
Running the software updater completely fixed the issue. It actually came with a popup for the password, which seems to be the missing link that #4 is talking about, but pressing enter after adding passwords in it did not work for me, I had to press next, which explains why typing passwords and spamming enter did nothing. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1775526 Title: package linux-image-4.15.0-22-generic 4.15.0-22.24 failed to install/upgrade: installed linux-image-4.15.0-22-generic package pre- removal script subprocess returned error exit status 1 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1775526/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
