update-manager pkgProblemResolver::Resolve generated breaks

[Petros Sakkas]

Binary package hint: update-manager

Trying to upgrade from 10.04 to 10.10 and getting the following while "Setting new software channels":

Could not calculate the upgrade

An unresolvable problem occurred while calculating the upgrade:
E:Error, pkgProblemResolver::Resolve generated breaks, this may be caused by held packages.

 This can be caused by:
 * Upgrading to a pre-release version of Ubuntu
 * Running the current pre-release version of Ubuntu
 * Unofficial software packages not provided by Ubuntu

If none of this applies, then please report this bug against the 'update-manager' package and include the files in /var/log/dist-upgrade/ in the bug report.

ProblemType: Bug
DistroRelease: Ubuntu 10.04
Package: update-manager 1:0.134.11
ProcVersionSignature: Ubuntu 2.6.32-28.55-generic 2.6.32.27+drm33.12
Uname: Linux 2.6.32-28-generic i686
Architecture: i386
Date: Mon Feb 14 13:52:16 2011
InstallationMedia: Ubuntu 10.04.1 LTS "Lucid Lynx" - Release i386 (20100816.1)
PackageArchitecture: all
ProcEnviron:
 LANG=en_US.utf8
 SHELL=/bin/bash
SourcePackage: update-manager

[Manfred Hampl (m-hampl)]

This can be a duplicate of bug 614993 (and dozens of similar ones)

If the package xserver-xorg-video-nouveau is installed, in several cases the 10.04 to 10.10 upgrade fails with the error message

"Could not determine the upgrade
An unresolvable problem occurred while calculating the upgrade:
E:Error, pkgProblemResolver::Resolve generated breaks, this may be caused by held packages.
This can be caused by:
* Upgrading to a pre-release version of Ubuntu
* Running the current pre-release version of Ubuntu
* Unofficial software packages not provided by Ubuntu"

Several persons have reported that after removal of that package the upgrade was successful.

Try this workaround: Open a terminal and enter the command:

sudo apt-get remove xserver-xorg-video-nouveau

and try the upgrade again.

[Petros Sakkas (pmsakkas)]

Resolved!

Amazingly how it worked after I gave terminal the command:

sudo apt-get remove xserver-xorg-video-nouveau

Any idea of why this was happening?

Thank you!

PS:

Verbatim from Synaptic Package Manager re: xserver-xorg-video-nouveau

~~~~~

X.Org X server -- Nouveau display driver (experimental)

This driver for the X.Org X server (see xserver-xorg for a further description)
provides support for NVIDIA Riva, TNT, GeForce, and Quadro cards.

Although the nouveau project aims to provide full 3D support it is not yet
complete, and these packages do not include any 3D support.
Users requiring 3D support should use the non-free "nvidia" driver.

This package is built from the FreeDesktop.org xf86-video-nouveau driver.

Canonical provides critical updates for xserver-xorg-video-nouveau until April 2013.

~~~~~