This has nothing to do with a USB stick. It is because of the content of the CD/DVD/USB.
the bug is in the update-notifier data/apt-cdrom-check script * it works with the DVD * it works with ubuntu-11.10-alternate-amd64.iso * it doesn't wok with ubuntu-11.10-desktop-amd64.iso that is because the script returns 0 because there is no ./cdromupgrade file and not ./ubuntu directory on the normal ubutnu disk. Of course the script is easy to fix, to return another value on such a CD, but I think without a ./cdromupgrade file, an upgrade from CD/USB stick is not possible. I think this cannot be fixed? Or current Ubuntu CDs have these files? Maybe one of the developers can give advice. ** Package changed: update-manager (Ubuntu) => update-notifier (Ubuntu) -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/986686 Title: does not suggest to upgrade if 12.04 is on USB To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/update-notifier/+bug/986686/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs