Public bug reported:

Binary package hint: update-manager

My system (Ubuntu 9.10) is behind a proxy which requires authentication.
The credentials are stored in gconf. I always checked the correctness of
environment variable http_proxy before running a command from command
line.Normal actions in update-manager (1:0.111.9) work. I am able to get
normal package updates. So in this part, update-manger handles my auth-
proxy correctly. Without the credentials, the proxy would not handle any
requests.

But i am not able to do a distribution upgrade, neither with update-
manager nor do-release-upgrade. update-manager does not show the
notification "a new version of ubuntu...", do-release-upgrade fails
with:

$ sudo env | grep http_proxy; sudo /usr/bin/do-release-upgrade
 [sudo] password for user:
 http_proxy=http://user:[email protected]:3128/
 Checking for a new ubuntu release
 No new release found

The jaunty-proposed package 1:0.111.10 does not solve my problem. The 
notification "a new version of ubuntu..." is still not shown.
There are some patches in bug report #446552 which help a bit:
Both of Michaels patches (applied on 1:0.111.9) solve my problem for the gui 
update-manager. But both did not help for do-release-update.
The reason for failing on do-release-update is, that the problem is - at least 
partially - independend of url_downloadable. One problem exists in 
/usr/share/pyshared/UpdateManager/Core/MetaRelease.py around line 251. The code 
generates
 407: ('Proxy Authentication Required', 'You must authenticate with this proxy 
before proceeding.'), So i assume that the fix of the patch has to be applied 
on more places.

** Affects: update-manager (Ubuntu)
     Importance: Undecided
         Status: New

-- 
version upgrade via update-manager or do-release-upgrade does not work with 
proxy authentication
https://bugs.launchpad.net/bugs/479391
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