Thank you for taking the time to report this bug and helping to make Ubuntu better.
Looking at bug 1573408, this should be fixed in 3.20.1+git20160426.1.a976144-ubuntu-xenial-0ubuntu1, but it looks like there's been another update release since then. So if it has stopped working again, this might be a regression. Could you check which version of gnome-software you have installed? Please execute the following command only once, as it will automatically gather the version number and additional debugging information, in a terminal: apport-collect BUGNUMBER When reporting bugs in the future please use apport by using 'ubuntu- bug' and the name of the package affected. You can learn more about this functionality at https://wiki.ubuntu.com/ReportingBugs. ** Tags added: xenial ** Changed in: gnome-software (Ubuntu) Status: New => Incomplete -- You received this bug notification because you are a member of Ubuntu Desktop Bugs, which is subscribed to gnome-software in Ubuntu. https://bugs.launchpad.net/bugs/1605802 Title: Software Center still fails to install third-party .deb packages To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-software/+bug/1605802/+subscriptions -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs