[Bug 1009226] Re: Precise to Quantal: update-manager UI crashes: can't load DistUpgradeViewGtk (No module named vte)

[Jean-Baptiste Lallement]

Missing repositories are not the problem, they are just ignored. The
problem is that modules required by update-manager are missing in
python3:

for example:
This works:
$ python2 -c "import vte"
but this doesn't
$ python3 -c "import vte"
Traceback (most recent call last):
  File "<string>", line 1, in <module>
ImportError: No module named vte

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https://bugs.launchpad.net/bugs/1009226

Title:
  Precise to Quantal: update-manager UI crashes: can't load
  DistUpgradeViewGtk (No module named vte)

Status in “update-manager” package in Ubuntu:
  Confirmed
Status in “update-manager” source package in Quantal:
  Confirmed

Bug description:
  Upgrading from Wubi to Quantal causes following errors:

  
  authenticate 'quantal.tar.gz' against 'quantal.tar.gz.gpg' 
  extracting 'quantal.tar.gz'
  can't load DistUpgradeViewGtk (No module named vte)
  can't load DistUpgradeViewGtk3 (could not import gobject (error was: ImportError('When using gi.repository you must not import static modules like "gobject". Please change all occurrences of "import gobject" to "from gi.repository import GObject".',)))
  can't load DistUpgradeViewKDE (No module named PyQt4.QtCore)

  GUI fails and upgrade can't continue.

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