Could not calculate the upgrade on upgrade from 11.04 to 11.10

[Tim Black]

I initially asked for help on this problem at http://askubuntu.com/questions/109210/could-not-calculate-the-upgrade-on-upgrade-from-11-04-to-11-10.

I'm trying to upgrade from 11.04 to 11.10, but get this error:

> 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.

To attempt to fix this, I disabled all software sources not provided by Ubuntu, and I uninstalled all software not provided by Ubuntu in the Ubuntu Software Center. Synaptic tells me I still have natty/restricted nvidia-current, nvidia-glx-180, and nvidia-glx-185 installed. Could these last packages be what is holding back the upgrade? I hesitate to uninstall them because I'm worried that doing so may significantly reduce my screen resolution. What can I do to find out what packages are holding back the upgrade?

No packages are pinned so far as I know, which I researched as follows: dpkg --get-selections | grep hold returns nothing, and I created a custom filter in Synaptic for pinned packages and that filter shows no results also.

aking1012 wrote,

> Definitely turn off binary drivers during dist-upgrade and probably remove the packages.

I followed aking1012's recommendations and disabled the binary nvidia drivers. The result was that after logging out, I could not get back to Ubuntu's login screen. So I rebooted in safe mode using the failsafe graphics option. I tried running the upgrade to 11.10 from Ubuntu's Update Manager, and continue to get the same error listed above.

Other requested info:

1) Ubuntu release

tim@tim-laptop:~$ lsb_release -rd
Description: Ubuntu 11.04
Release: 11.04

2) Package version

tim@tim-laptop:~$ apt-cache policy update-manager
update-manager:
  Installed: 1:0.150.5.2
  Candidate: 1:0.150.5.2
  Version table:
 *** 1:0.150.5.2 0
        500 http://us.archive.ubuntu.com/ubuntu/ natty-updates/main i386 Packages
        500 http://us.archive.ubuntu.com/ubuntu/ natty-security/main i386 Packages
        100 /var/lib/dpkg/status
     1:0.150 0
        500 http://us.archive.ubuntu.com/ubuntu/ natty/main i386 Packages

3) I expected the upgrade to proceed without errors.

4) The upgrade failed with the error reported above.

ProblemType: Bug
DistroRelease: Ubuntu 11.04
Package: update-manager 1:0.150.5.2
ProcVersionSignature: Ubuntu 2.6.38-13.56-generic 2.6.38.8
Uname: Linux 2.6.38-13-generic i686
Architecture: i386
Date: Fri Mar 2 10:46:09 2012
GConfNonDefault:
 /apps/update-manager/check_new_release_ignore=oneiric
 /apps/update-manager/first_run=false
 /apps/update-manager/show_details=true
 /apps/update-manager/window_size=(630,1020)
PackageArchitecture: all
ProcEnviron:
 LANGUAGE=en_US:en
 PATH=(custom, user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: update-manager
UpgradeStatus: Upgraded to natty on 2012-03-02 (0 days ago)
VarLogDistupgradeApttermlog:

VarLogDistupgradeHistorylog:

VarLogDistupgradeTermlog:

[Tim Black (tim-alwaysreformed)]

Is there a better place for me to ask for help on this?

[RedSingularity (redsingularity)]

If you remove this package try the upgrade again. If it fails again attach the files from /var/log/dist-upgrade

sudo apt-get remove libglib2-ruby1.8

Thanks.
---
Ubuntu Bug Squad volunteer triager
http://wiki.ubuntu.com/BugSquad

[Tim Black (tim-alwaysreformed)]

Thank you very much. I removed libglib2-ruby1.8 and the upgrade was able to complete successfully.