I made further experiments and partially solved the problem: Start the (UMTS) modem, start Firefox, select "File" -> "Work Offline". "Work Offline" should now be unchecked and Firefox should now work properly.
Interestingly, most of the rest of my system reacted on this change, too. Adept and Evolution both work. Konqueror, on the other hand, still refuses to recognize the connection through the modem. -- Ubuntu's new "Offline Mode" feature cannot properly detect when there is a valid network available for use in many circumstances https://bugs.launchpad.net/bugs/191889 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs