[Bug 294139] Re: update-manager fail release upgrade if using apt-cacher

[Walter Garcia-Fontes]

Sorry that the issue got unattended at the time of report. Please feel
free to reopen by marking the status as "new" if you see this in current
versions of update-manager.

** Changed in: update-manager-core (Ubuntu)
       Status: New => Incomplete

** Package changed: update-manager-core (Ubuntu) => update-manager
(Ubuntu)

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https://bugs.launchpad.net/bugs/294139

Title:
  update-manager fail release upgrade if using apt-cacher

Status in “update-manager” package in Ubuntu:
  Incomplete

Bug description:
  Binary package hint: update-manager-core

  Upgrading from hardy to intrepid, do-release-upgrade stops saying:

  $ do-release-upgrade 
  Checking for a new ubuntu release
  Failed Upgrade tool signature
  Done Upgrade tool
  Done downloading            
  extracting 'intrepid.tar.gz'
  authenticate 'intrepid.tar.gz' against 'intrepid.tar.gz.gpg' 
  exception from gpg: GnuPG exited non-zero, with code 131072
  Debug information: 

  gpg: WARNING: unsafe permissions on homedir `/tmp/tmpOaFaki'

  gpg: can't open `/tmp/tmpOaFaki/intrepid.tar.gz.gpg'
  gpg: verify signatures failed: file open error

  Authentication failed
  Authenticating the upgrade failed. There may be a problem with the network or with the server. 

  
  I get the same error (last 2 lines) if I use the gui command update-manager.

  I'm using apt-cacher through apt.conf, which has a line:

  Acquire::http::Proxy "http://paolo:3142/";

  On the contrary, all runs perfectly if I disable the apt-cacher
  invoking line of apt.conf

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