Just for fun I tried upgrading software-properties-gtk to version 0.96.24.8 (along with both dependencies) from "http://us.archive.ubuntu.com/ubuntu/pool/main/s/software-properties/". Unfortunately that didn't make any apparent difference.
I also tried downgrading to version 0.96.20.5, which also exhibits the same failure. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1660100 Title: Unable to enable or disable repository in Software & Updates To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/software-properties/+bug/1660100/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs