I found meanwhile that the web login worked at most other places I have been to since then. Thus, Ubuntu 20.04 seems to ignore the captive portal only under particular circumstances which indicates that one of the less common captive portal variants does not work.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1910908 Title: Web-login page for captive portals not opening on public wireless networks To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/network-manager/+bug/1910908/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
