I can't upgrade Kubuntu 14.04 to 14.10

I have issues upgrading Kubuntu 14.04 to 14.10, I looked up all the previous questions concerning this issue, but nothing helped. The problem I get is the same, either I try to update using command line or the Muon Update manager. Here the screen-shots:

And Here is the content of the Bug report, in case it highlights what's wrong:

And here's the content of /etc/apt/sources.list:

#############################################################
################### OFFICIAL UBUNTU REPOS ###################
#############################################################

###### Ubuntu Main Repos
deb http://fr.archive.ubuntu.com/ubuntu/ trusty restricted universe multiverse

###### Ubuntu Update Repos
deb http://fr.archive.ubuntu.com/ubuntu/ trusty-security main restricted universe multiverse
deb http://fr.archive.ubuntu.com/ubuntu/ trusty-updates main restricted universe multiverse
deb-src http://fr.archive.ubuntu.com/ubuntu/ trusty-security main restricted universe multiverse
deb-src http://fr.archive.ubuntu.com/ubuntu/ trusty-updates main restricted universe multiverse
deb-src http://fr.archive.ubuntu.com/ubuntu/ trusty-proposed main restricted universe multiverse
deb-src http://fr.archive.ubuntu.com/ubuntu/ trusty-backports main restricted universe multiverse

output of apt-cache policy ubuntu-minimal

ubuntu-minimal: Installed: 1.325 Candidate: 1.325 Version table: *** 1.325 0 500 http://us.archive.ubuntu.com/ubuntu/ trusty/main amd64 Packages 100 /var/lib/dpkg/status

Instead of using the GUI, you can use sudo apt-get update && sudo apt-get dist-upgrade. I recommend that you use the US sources or Main server sources in your software settings.

You can open a terminal by pressing CTRL+ALT+T on your keyboard.

I am unable to upgrade my Kubuntu desktop. But I discovered that there is a log file in /var/log/dist-upgrade/main.log which gives more information on what the problem was. In my case, it says "

2015-04-20 16:53:19,408 DEBUG blacklist expr '^postgresql-.*[0-9]\.[0-9].*' matches 'postgresql-9.3-postgis-2.1'
2015-04-20 16:53:19,408 DEBUG The package 'postgresql-9.3-postgis-2.1' is marked for removal but it's in the removal blacklist
2015-04-20 16:53:19,440 ERROR Dist-upgrade failed: 'The package 'postgresql-9.3-postgis-2.1' is marked for removal but it is in the removal blacklist.'
2015-04-20 16:53:19,445 DEBUG abort called

Which means the problem is that postGIS is interfering with the way PostgreSQL never removes the old version and just installs the new one in parallel. The OP probably has a different problem, but that log file might be useful to discover what the problem is.