UPDATE. I managed to fix the access to the system settings via $ sudo apt-get install --reinstall unity-control-center
However, mouse in Ubuntu Button is still not working. ** Summary changed: - Mouse doesn't work in system menus, but works in Apps + Mouse doesn't work in Ubuntu Button - keyboard only -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1736796 Title: Mouse doesn't work in Ubuntu Button - keyboard only To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/unity/+bug/1736796/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs