I encountered this same issue in a freshly installed Ubuntu 18.04 system. $ uname -a Linux Machine 5.0.0-25-generic #26~18.04.1-Ubuntu SMP Thu Aug 1 13:51:02 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux
$ lsb_release -rd Description: Ubuntu 18.04.3 LTS Release: 18.04 $ gnome-shell --version GNOME Shell 3.28.4 To discover the error, I ran this app via command line: $ /usr/bin/python3 /usr/bin/software-properties-gtk ERROR:root:Authentication canceled, changes have not been saved ERROR:root:Authentication canceled, changes have not been saved ERROR:root:Authentication canceled, changes have not been saved ERROR:root:Authentication canceled, changes have not been saved ERROR:root:Authentication canceled, changes have not been saved ERROR:root:Authentication canceled, changes have not been saved The above errors appear every time the mouse arrow left-clicks on the checkbox. I circumvent this issue by: 1. left-click on Canonical Partners to select it. 2. left click on the edit button. 3. after the Edit Source GUI appeared, I left-clicked on the "OK" button. 4. finally when I left-click on the checkbox of Canonical Partners, the checkbox becomes selected. -- You received this bug notification because you are a member of Ubuntu Desktop Bugs, which is subscribed to gnome-shell in Ubuntu. https://bugs.launchpad.net/bugs/1727908 Title: Software & Updates application does not permit changes on the "Other Software" tab To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-shell/+bug/1727908/+subscriptions -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs
