Errors were encountered while processing:
 ubuntu-desktop
Error in function:


A fatal error occurred

Please report this as a bug and include the files
/var/log/dist-upgrade/main.log and /var/log/dist-upgrade/apt.log in
your report. The upgrade has aborted.
Your original sources.list was saved in
/etc/apt/sources.list.distUpgrade.

SystemError: E:Sub-process /usr/bin/dpkg returned an error code (1)



Could not install the upgrades

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main.log:
2014-11-02 17:56:21,891 ERROR got an error from dpkg for pkg: 'ubuntu-desktop': 'dependency problems - leaving unconfigured'
2014-11-02 17:56:21,891 DEBUG running apport_pkgfailure() ubuntu-desktop: dependency problems - leaving unconfigured
2014-11-02 17:56:21,891 DEBUG dpkg error because of dependency problems, not reporting against ubuntu-desktop
2014-11-02 18:03:37,911 ERROR not handled exception:
SystemError: E:Sub-process /usr/bin/dpkg returned an error code (1)

2014-11-02 18:03:37,912 DEBUG enabling apt cron job
2014-11-02 18:03:38,000 ERROR SystemError from cache.commit(): installArchives() failed
2014-11-02 18:03:38,118 DEBUG enabling apt cron job
2014-11-02 18:03:38,119 DEBUG Running PostInstallScript: './xorg_fix_proprietary.py'
2014-11-02 18:04:14,335 DEBUG enabling apt cron job


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apt.log:
Investigating (1) ubuntu-desktop [ amd64 ] < none -> 1.325 > ( metapackages )
Broken ubuntu-desktop:amd64 Depends on ubuntu-session [ amd64 ] < none -> 3.9.90-0ubuntu12 > ( gnome )
  Considering ubuntu-session:amd64 1 as a solution to ubuntu-desktop:amd64 9999
Done

Can't install 'ubuntu-desktop'

It was impossible to install a required package. Please report this
as a bug using 'ubuntu-bug ubuntu-release-upgrader-core' in a
terminal.

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apt-get install ubuntu-session:

The following packages have unmet dependencies:
 ubuntu-session : Depends: gnome-session-bin (< 3.10) but 3.10.1-0ubuntu1~saucy1 is to be installed
                  Depends: gnome-session-common (= 3.9.90-0ubuntu12) but 3.10.1-0ubuntu1~saucy1 is to be installed
E: Unable to correct problems, you have held broken packages.

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apt-get install ubuntu-desktop:

The following packages have unmet dependencies:
 ubuntu-desktop : Depends: ubuntu-session but it is not going to be installed
                  Recommends: empathy but it is not going to be installed
E: Unable to correct problems, you have held broken packages.