Thank you Robert Ancell and Steve Langasek. Your patch fixed the issue.
I've updated gnome-software, gnome-software-common and gnome-software- plugin-snap to version 3.30.2-0ubuntu4 (only those packages, I left other available updates in the queue to be able to test the updated version) It now shows no updates available in the updates tab, and a tick mark with the text Software is up to date in the main window. (screenshot attached) Thank you again for acting so quickly on this issue, I'm very impressed! ** Attachment added: "sceenshot showing gnome-software 3.30.2-0ubuntu4 fix the issue" https://bugs.launchpad.net/ubuntu/+source/gnome-software/+bug/1797543/+attachment/5201487/+files/gnome-software%203.30.2-0ubuntu4.png ** Tags removed: verification-needed verification-needed-cosmic ** Tags added: verification-done verification-done-cosmic -- 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/1797543 Title: Unable to update software - Button Restart & Update, restarts no updates applied To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-software/+bug/1797543/+subscriptions -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs