[Bug 919219] Re: "exception from gpg: GnuPG exited non-zero" whie upgrading to Precise

[Andrew Cleveland]

For me this problem was caused by /tmp being mounted as noexec.

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https://bugs.launchpad.net/bugs/919219

Title:
  "exception from gpg: GnuPG exited non-zero" whie upgrading to Precise

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

Bug description:
  I'm trying to update from Oneiric to Precise. Here's what update-
  manager -d says after the "Downloading the release upgrade tool"
  window gets closed:

  authenticate 'precise.tar.gz' against 'precise.tar.gz.gpg'
  exception from gpg: GnuPG exited non-zero, with code 1
  Debug information:

  gpg: Signature made Wed 18 Jan 2012 07:53:58 AM OMST using DSA key ID 437D05B5
  gpg: /tmp/update-manager-w6dStv/trustdb.gpg: trustdb created
  gpg: BAD signature from "Ubuntu Archive Automatic Signing Key <ftpmaster at ubuntu.com>"

  Traceback (most recent call last):
    File "/usr/lib/python2.7/dist-packages/UpdateManager/UpdateManager.py", line 1099, in on_button_dist_upgrade_clicked
      fetcher.run()
    File "/usr/lib/python2.7/dist-packages/UpdateManager/Core/DistUpgradeFetcherCore.py", line 251, in run
      _("Authenticating the upgrade failed. There may be a problem "
    File "/usr/lib/python2.7/dist-packages/UpdateManager/DistUpgradeFetcher.py", line 41, in error
      return error(self.window_main, summary, message)
    File "/usr/lib/python2.7/dist-packages/UpdateManager/Core/utils.py", line 404, in error
      d.window.set_functions(Gdk.FUNC_MOVE)
  RuntimeError: unable to get the value

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