I wanted to try the new version of kubuntu desktop (KDE SC 4.10) on my Ubuntu 12.10, so I did this:
sudo add-apt-repository ppa:kubuntu-ppa/backports sudo apt-get update sudo apt-get install kubuntu-desktop
installation went without problems, I ended unity session and logged into KDE. But when I wanted to log back into unity, this option wasn't there, there were just options Gnome Classic and KDE. I found out that Unity was somehow removed, so I tried installing it back on with
sudo apt-get install unity, but I got this:
Reading package lists... Done Building dependency tree Reading state information... Done Some packages could not be installed. This may mean that you have requested an impossible situation or if you are using the unstable distribution that some required packages have not yet been created or been moved out of Incoming. The following information may help to resolve the situation: The following packages have unmet dependencies: unity : Depends: libunity-core-6.0-5 (= 6.12.0+bzr2800sruubuntu0+808) but it is not going to be installed Depends: libunity-protocol-private0 (>= 6.12.0) but 6.10.0+bzr188sruubuntu0+152 is to be installed Recommends: unity-lens-music but it is not going to be installed Recommends: unity-lens-shopping but it is not going to be installed Recommends: unity-lens-video but it is not going to be installed E: Unable to correct problems, you have held broken packages.
sudo apt-get -f install but it did nothing. I know that I'm one of the few people, who want Unity back instead of getting rid of it, but is there a way to fix this and bring Unity back?
EDIT: I also tried
sudo apt-get install ubuntu-desktop but I got a similar error, because one of its dependencies is Unity, which cannot be installed.