[Bug 986366] [NEW] Failed to upgrade from Oneric to Precise: Could not early remove python-minimal

[disco_stew]

Public bug reported:

Trying to upgrade from Oneric to Precise Beta 2 using "update-manager
-d" will not complete. Calculating changes and downloading packages
works fine, but once the upgrade gets to the install phase it aborts
with this error "Could not install the upgrades". Running update-manager
again prompts me to do a partial upgrade, which fails with the exact
same error. I am now stuck in limbo between the two releases. Looking at
the terminal output the exact error seems to be "Could not early remove
python-minimal". Here is all the output:

$sudo update-manager -d

(update-manager:2505): Gdk-CRITICAL **: gdk_window_get_pointer:
assertion `GDK_IS_WINDOW (window)' failed

(update-manager:2505): Gdk-CRITICAL **: gdk_window_get_pointer:
assertion `GDK_IS_WINDOW (window)' failed

(update-manager:2505): Gdk-CRITICAL **: gdk_window_get_pointer:
assertion `GDK_IS_WINDOW (window)' failed

(update-manager:2505): Gdk-CRITICAL **: gdk_window_get_pointer:
assertion `GDK_IS_WINDOW (window)' failed

(update-manager:2505): Gdk-CRITICAL **: gdk_window_get_pointer:
assertion `GDK_IS_WINDOW (window)' failed

(update-manager:2505): Gdk-CRITICAL **: gdk_window_get_pointer: assertion `GDK_IS_WINDOW (window)' failed
start: Job is already running: apport
ERROR:root:SystemError from cache.commit(): installArchives() failed
ERROR:root:found exception: 'E:This installation run will require temporarily removing the essential package python-minimal due to a Conflicts/Pre-Depends loop. This is often bad, but if you really want to do it, activate the APT::Force-LoopBreak option., E:Internal Error, Could not early remove python-minimal'
ERROR:root:not handled expection:
Traceback (most recent call last):

  File "/usr/bin/update-manager", line 106, in <module>
    controler.doPartialUpgrade()

  File "/usr/lib/python2.7/dist-packages/DistUpgrade/DistUpgradeController.py", line 1694, in doPartialUpgrade
    if not self.doDistUpgrade():

  File "/usr/lib/python2.7/dist-packages/DistUpgrade/DistUpgradeController.py", line 1083, in doDistUpgrade
    self._view.getTerminal().call(cmd)

  File "/usr/lib/python2.7/dist-packages/DistUpgrade/DistUpgradeViewGtk3.py", line 360, in call
    None, # child_setup_data

  File "/usr/lib/python2.7/dist-packages/gi/types.py", line 43, in function
    return info.invoke(*args, **kwargs)

GError: Failed to execute child process "dpkg" (No such file or
directory)

Traceback (most recent call last):
  File "/usr/bin/update-manager", line 106, in <module>
    controler.doPartialUpgrade()
  File "/usr/lib/python2.7/dist-packages/DistUpgrade/DistUpgradeController.py", line 1694, in doPartialUpgrade
    if not self.doDistUpgrade():
  File "/usr/lib/python2.7/dist-packages/DistUpgrade/DistUpgradeController.py", line 1083, in doDistUpgrade
    self._view.getTerminal().call(cmd)
  File "/usr/lib/python2.7/dist-packages/DistUpgrade/DistUpgradeViewGtk3.py", line 360, in call
    None, # child_setup_data
  File "/usr/lib/python2.7/dist-packages/gi/types.py", line 43, in function
    return info.invoke(*args, **kwargs)
gi._glib.GError: Failed to execute child process "dpkg" (No such file or directory)
$

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

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https://bugs.launchpad.net/bugs/986366

Title:
  Failed to upgrade from Oneric to Precise: Could not early remove
  python-minimal

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

Bug description:
  Trying to upgrade from Oneric to Precise Beta 2 using "update-manager
  -d" will not complete. Calculating changes and downloading packages
  works fine, but once the upgrade gets to the install phase it aborts
  with this error "Could not install the upgrades". Running update-
  manager again prompts me to do a partial upgrade, which fails with the
  exact same error. I am now stuck in limbo between the two releases.
  Looking at the terminal output the exact error seems to be "Could not
  early remove python-minimal". Here is all the output:

  $sudo update-manager -d

  (update-manager:2505): Gdk-CRITICAL **: gdk_window_get_pointer:
  assertion `GDK_IS_WINDOW (window)' failed

  (update-manager:2505): Gdk-CRITICAL **: gdk_window_get_pointer:
  assertion `GDK_IS_WINDOW (window)' failed

  (update-manager:2505): Gdk-CRITICAL **: gdk_window_get_pointer:
  assertion `GDK_IS_WINDOW (window)' failed

  (update-manager:2505): Gdk-CRITICAL **: gdk_window_get_pointer:
  assertion `GDK_IS_WINDOW (window)' failed

  (update-manager:2505): Gdk-CRITICAL **: gdk_window_get_pointer:
  assertion `GDK_IS_WINDOW (window)' failed

  (update-manager:2505): Gdk-CRITICAL **: gdk_window_get_pointer: assertion `GDK_IS_WINDOW (window)' failed
  start: Job is already running: apport
  ERROR:root:SystemError from cache.commit(): installArchives() failed
  ERROR:root:found exception: 'E:This installation run will require temporarily removing the essential package python-minimal due to a Conflicts/Pre-Depends loop. This is often bad, but if you really want to do it, activate the APT::Force-LoopBreak option., E:Internal Error, Could not early remove python-minimal'
  ERROR:root:not handled expection:
  Traceback (most recent call last):

    File "/usr/bin/update-manager", line 106, in <module>
      controler.doPartialUpgrade()

    File "/usr/lib/python2.7/dist-packages/DistUpgrade/DistUpgradeController.py", line 1694, in doPartialUpgrade
      if not self.doDistUpgrade():

    File "/usr/lib/python2.7/dist-packages/DistUpgrade/DistUpgradeController.py", line 1083, in doDistUpgrade
      self._view.getTerminal().call(cmd)

    File "/usr/lib/python2.7/dist-packages/DistUpgrade/DistUpgradeViewGtk3.py", line 360, in call
      None, # child_setup_data

    File "/usr/lib/python2.7/dist-packages/gi/types.py", line 43, in function
      return info.invoke(*args, **kwargs)

  GError: Failed to execute child process "dpkg" (No such file or
  directory)

  Traceback (most recent call last):
    File "/usr/bin/update-manager", line 106, in <module>
      controler.doPartialUpgrade()
    File "/usr/lib/python2.7/dist-packages/DistUpgrade/DistUpgradeController.py", line 1694, in doPartialUpgrade
      if not self.doDistUpgrade():
    File "/usr/lib/python2.7/dist-packages/DistUpgrade/DistUpgradeController.py", line 1083, in doDistUpgrade
      self._view.getTerminal().call(cmd)
    File "/usr/lib/python2.7/dist-packages/DistUpgrade/DistUpgradeViewGtk3.py", line 360, in call
      None, # child_setup_data
    File "/usr/lib/python2.7/dist-packages/gi/types.py", line 43, in function
      return info.invoke(*args, **kwargs)
  gi._glib.GError: Failed to execute child process "dpkg" (No such file or directory)
  $

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