Can you append the output for the following apt-get statements with some debugging information:
$ sudo apt-get update -o Debug::acquire::http=true $ sudo apt-get dist-upgrade -o Debug::acquire::http=true -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/797550 Title: indefinite download tries behind a proxy To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/apt/+bug/797550/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs