In what does not seem to be a wise decision for all users, Canonical decided to remove the (slow) Ubuntu Software Center to make way for GNOME Software as the default package manager for Ubuntu 16.04 LTS (Xenial Xerus). Later, Canonical changed the name to Ubuntu Software to make things easier for new users. The problem is that there was one statement that prevented .deb packages from being installed third-party GNOME Software (or Ubuntu Software).
An LTS version like Ubuntu 16.04 should not come with this type of problem for two reasons: because Ubuntu is one of the most used GNU / Linux operating systems in the world and because it is a version Long Term Support which is more important than the versions that are released every six months. The problem is that the first thing many users do just install a system is look for the .deb packages of the most used applications and install them, which they could not do in Ubuntu 16.04 for the aforementioned error.
A patch for GNOME Software arrives that fixes the problem
In these two weeks of life that Ubuntu 16.04 LTS has, if you wanted to install a third-party .deb package you could install from the terminal (with the command suo dpkg -i nombreedelpaquete.deb) Or using other types of package managers, such as Gdebi which comes installed on Ubuntu MAT (and reason why I had not experienced this problem).
Admittedly, it’s surprising that canonical has released a new LTS version of Ubuntu with a bug like this and it has taken him a week to fix the problem. But the best part is that the wait is over and the new version is already in the official Ubuntu repositories. To install it, just run the “Software Update” application or open a terminal and use the command sudo apt update (Yes, it can be done without “-get”).
Have you been experiencing the problem with GNOME Software preventing third-party .deb packages from being installed?