Comment 6 for bug 1285488

Hi Tim.

I filed this bug report because my system was (and is) barely customized when this error occured. Like I said, the 'Broken Pipe' thing made me believe that this was some kind of packaging issue, while I don't have any conficted PPAs or packages in the system.

I later marked it as invalid because I was able to fix it in my installation by removing the gnome-session package at first and the ubuntu-session afterwards (the other way around not working because gnome-session is a dependency for ubuntu-session) . Finally running upgrade & dist-upgrade installed the remaining packages without any issues and after that I was able to install the gnome-session package without any errors.

I only mention the above in case you think is useful for fixing this issue. So, the steps for fixing this in my system was:
sudo apt-get remove gnome-session
sudo apt-get remove ubuntu-session
sudo apt-get upgrade
sudo apt-get dist-upgrade
sudo apt-get install gnome-session

Hope this helps.

Best regards,
Elias