Update from 11.04 to 11.10 failed while "calculating the changes"

[Walter Garcia-Fontes]

Updating to 11.10 beta 1 failed during the "calculating the changes" step, following window popped up

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 using the command 'ubuntu-bug update-manager' in a terminal.

ProblemType: Bug
DistroRelease: Ubuntu 11.04
Package: update-manager 1:0.150.3
ProcVersionSignature: Ubuntu 2.6.38-11.48-generic 2.6.38.8
Uname: Linux 2.6.38-11-generic x86_64
Architecture: amd64
Date: Fri Sep 2 11:25:20 2011
GConfNonDefault:
 /apps/update-manager/check_new_release_ignore=
 /apps/update-manager/first_run=false
 /apps/update-manager/show_details=true
 /apps/update-manager/window_size=(597,598)
InstallationMedia: Ubuntu 10.04 LTS "Lucid Lynx" - Release amd64 (20100427.1)
PackageArchitecture: all
ProcEnviron:
 LANGUAGE=en_US:en
 LANG=en_US.UTF-8
 SHELL=/bin/tcsh
SourcePackage: update-manager
UpgradeStatus: Upgraded to natty on 2011-09-02 (0 days ago)

[Walter Garcia-Fontes (walter-garcia)]

Logs in /var/log/dist-upgrade

[Justin Bassett (tubbybassett)]

Same thing happened to me. If you need more logs just ask.

[Brian K. Mangum (bkmangum)]

I initially updated from 11.04 to 11.10 with no problem at all. So I then decided to do a fresh install to see how that would go and that's when I had the same problem you are having. I am now unable to update because of it.

[Brian K. Mangum (bkmangum)]

If you need any logs just let me know how to get them and I'll provide them for you.

[Brian K. Mangum (bkmangum)]

I got around this issue by opening the terminal and typing sudo apt-get update then sudo apt-get -u upgrade.

[Justin Bassett (tubbybassett)]

I did not change anything and tried the upgrade again and I worked.

[Walter Garcia-Fontes (walter-garcia)]

I could solve this problem by inspecting the file /var/log/dist-upgrade/apt.log.

I could see there at the last lines that the culprit for the unmet dependencies was "gcc-4.4". I uninstalled buil-essential and gcc-4.4 and now the error is gone and the upgrade has proceeded normally. I will reinstall when I finish upgrading.

Marking the bug as "invalid", feel free to reopen it if it is really a bug and not something which was misconfigured in my system.

[Pierre Leman (pierrelem)]

Got the same issue and removing packages "build-essential" and "gcc-4.4" worked for me too.