HEY, I JUST FOUND A SOLUTION I just found a solution which resolved my own problem, but still wish to report this bug:
A serious warning appeared on the top menu, which lead to solution: Fail to update may be "bad connection" OR "on Software & Updates" tick (selected) a source that is no longer supported. So, the bug is this: The message from Software Updater reads "bad connection" but does not give the second alternative "or Software & Updates" So, I tried one-by-one, the Software & Updates line that caused the stop was: Installable from CD-ROM/DVD, Cdrom with Ubuntu 13.04 "Raring Ringtail" Restricted copyright. So, the only bug is on the Warning: Failed to download repository information Check your Internet connection, AND/OR Check Software & Updates for unsupported updates ** Changed in: ubuntu-release-upgrader (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/1187224 Title: Software Updater connection To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ubuntu-release-upgrader/+bug/1187224/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs