Apparently downgrading to the version of sudo in impish solves the problem, which means a change in sudo caused this.
** Also affects: sudo (Ubuntu) Importance: Undecided Status: New ** Also affects: sudo (Ubuntu Impish) Importance: Undecided Status: New ** Also affects: software-properties (Ubuntu Impish) Importance: Undecided Status: New ** Also affects: ubuntustudio-default-settings (Ubuntu Impish) Importance: Undecided Status: New ** Also affects: policykit-1 (Ubuntu Impish) Importance: Undecided Status: New ** Also affects: kubuntu-settings (Ubuntu Impish) Importance: Undecided Status: New ** Also affects: kdesu (Ubuntu Impish) Importance: Undecided Status: New ** Changed in: sudo (Ubuntu Impish) Status: New => Invalid ** Changed in: sudo (Ubuntu Jammy) Status: New => Confirmed ** Changed in: ubuntustudio-default-settings (Ubuntu Impish) Status: New => Invalid ** Changed in: software-properties (Ubuntu Impish) Status: New => Triaged ** Changed in: kubuntu-settings (Ubuntu Impish) Status: New => Invalid ** Changed in: kdesu (Ubuntu Impish) Status: New => Invalid ** Changed in: policykit-1 (Ubuntu Impish) Status: New => Invalid ** Changed in: software-properties (Ubuntu Impish) Status: Triaged => Invalid ** Changed in: sudo (Ubuntu) Status: New => Confirmed -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1965439 Title: software-properties-qt can no longer launch when called by kdesu To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/kdesu/+bug/1965439/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs