After several discussions in the comments, it was shown that the essentials of my first comment was correct and installing xubuntu-desktop
and then the PPAs and then upgrading enabled Thunar
to be installed and available in Lubuntu, and not just for the Xfce session.
Firstly, the ppas are designed for Xubuntu 12.04, as noted at Launchpad, so it may be easier to install Xubuntu-desktop
and then upgrade that:
sudo apt-get install xubuntu-desktop
If you wish to get the very minimum amount of packages you could use the --no-install-recommends
flag after xubuntu-desktop
.
As noted at Launchpad, it is important to note that on 12.04 both the Xfce 4.10 ppa and the Xfce 4.12 ppa needs to be installed.
Install the 4.10 ppa first with
sudo add-apt-repository ppa:xubuntu-dev/xfce-4.10
sudo apt-get update
sudo apt-get upgrade
Then logout and login again (in your normal Lubuntu session) and install the next PPA with
sudo add-apt-repository ppa:xubuntu-dev/xfce-4.12
sudo apt-get update
sudo apt-get upgrade
Now logout and login again (in your normal Lubuntu session) and Thunar
will be able to be used in a normal Lubuntu session and not just in an Xfce session.
This article and this one contain information for updating a full Xubuntu 12.04 LTS install and may also be useful, but, as I have shown, the steps are different in Lubuntu 12.04.
libthunarx-2-0
andthunar-data
and which versions are available? If you see the right versions, you should be able to mark them for upgrade too.