There is a error into the /usr/share/polkit-1/actions/com.ubuntu.pkexec .gdebi-gtk.policy file:
Change "<action id="com.ubuntu.pkexec.gdebi.gtk">" with "<action id="com.ubuntu.pkexec.gdebi-gtk">". -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1756238 Title: gdebi-gtk broken in 18.04 error: unable to read filedescriptor flags To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gdebi/+bug/1756238/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs