Hello I just installed an Ubuntu12.04 64 bit system.
I am using gnome classic but I don't think this is related to my problem.
The problem is that during the installation (or just after I don't remember) I was informed by the installer that some packets where not able to be installed.
I just ignored it.
The problem is that I had selected Greek for keyboard layout so when i tried to change the input method nothing happened.
I went to keyboard preferences->input
method and it seems that I cannot add anything (add button is disabled) only thing i can select is input method to be Chinese or something, but I cannot add a layout....