Trying to install 14.04 LTS alongside Windows 7 I have four partitions (2 windows partitions), a ext4 for the ubuntu install, and a remaining ntfs data partition

As a follow up to [Ubuntu 14.04 installer doesn't show existing partitions](https://superuser.com/questions/744916/ubuntu-14-04-installer-doesnt-show-existing-partitions) I encounter a very similar problem. Running fixparts however does not indicate any particular problem with the partition table.

Whatever I try to do, I always end up with an empty list in the installer and cannot choose anything to install /root to...