I've been getting these umnet dependency errors for quite a lot of things since I installed Ubuntu 15.10.
libxine2-dev : Depends: libxine2-bin (= 1.2.6-1build3) but it is not going to be installed linux-generic : Depends: linux-headers-generic (= 18.104.22.168.33) but 22.214.171.124.27 is to be installed linux-signed-generic : Depends: linux-headers-generic (= 126.96.36.199.33) but 188.8.131.52.27 is to be installed E: Unmet dependencies. Try 'apt-get -f install' with no packages (or specify a solution).
This is an example of the recent one I got today. What should I do to fix this? 'apt-get -f install' never solves the problem and always asks to do the same again. :(