OK, I think I might have found it. Looking through this <a href="http://ubuntuforums.org/showthread.php?t=613521&page=2">thread</a> it appears as though the local machine's entry in /etc/hosts is not quite right. My /etc/hosts was originally:
After this change I killed and restarted Update Manager and it worked without problems. I'm guessing there should be a bug opened with Update Manager so that if the hosts name cannot be determined it will at least throw a dialog box up to complain. Hanging the system just because it cant resolve its own name is not a good thing.
OK, I think I might have found it. Looking through this <a href="http:// ubuntuforums. org/showthread. php?t=613521& page=2">thread</a> it appears as though the local machine's entry in /etc/hosts is not quite right. My /etc/hosts was originally:
127.0.0.1 localhost example. com
127.0.1.1 Udesktop.
And I changed it to:
127.0.0.1 localhost example. com
127.0.0.1 Udesktop Udesktop.
After this change I killed and restarted Update Manager and it worked without problems. I'm guessing there should be a bug opened with Update Manager so that if the hosts name cannot be determined it will at least throw a dialog box up to complain. Hanging the system just because it cant resolve its own name is not a good thing.