I removed the package libgtk2-perl from my testing system, then I installed the version of update-manager (16.04.8) from xenial-proposed. While the package was installing I observed libgtk2-perl also being installed. Additionally, when I ran the new version of update-manager I did not see any error messages about being unable to initialize the Gnome frontend.
I removed the package libgtk2-perl from my testing system, then I installed the version of update-manager (16.04.8) from xenial-proposed. While the package was installing I observed libgtk2-perl also being installed. Additionally, when I ran the new version of update-manager I did not see any error messages about being unable to initialize the Gnome frontend.