Similar output on my home machine (same version of Ubuntu, same LTS enablement stack):
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: libcheese-gtk23 : Depends: libclutter-gtk-1.0-0 (>= 0.91.8) but it is not going to be installed Depends: libcogl15 (>= 1.15.8) but it is not going to be installed libcheese7 : Depends: libclutter-gst-2.0-0 (>= 0.10.0) but it is not going to be installed Depends: gstreamer1.0-clutter but it is not going to be installed libclutter-1.0-0 : Depends: libcogl-pango15 (>= 1.15.8) but it is not going to be installed Depends: libcogl15 (>= 1.15.8) but it is not going to be installed libwayland-egl1-mesa-lts-vivid : Depends: libegl1-mesa-lts-vivid (= 10.5.2-0ubuntu1~trusty1) but it is not going to be installed xserver-xorg-core-lts-vivid : Depends: libgbm1-lts-vivid (>= 8.1~0) but it is not going to be installed Recommends: libgl1-mesa-dri-lts-vivid (>= 7.10.2-4) but it is not going to be installed xserver-xorg-lts-vivid : Recommends: libgl1-mesa-dri-lts-vivid but it is not going to be installed Recommends: libgl1-mesa-glx-lts-vivid but it is not going to be installed Recommends: libegl1-mesa-lts-vivid but it is not going to be installed Recommends: libegl1-mesa-drivers-lts-vivid but it is not installable Recommends: libgbm1-lts-vivid but it is not going to be installed Recommends: libgles2-mesa-lts-vivid but it is not going to be installed Recommends: libgles1-mesa-lts-vivid but it is not going to be installed Conflicts: libegl1-mesa (>= 0~) Conflicts: libgl1-mesa-dri (>= 0~) Conflicts: libgl1-mesa-glx (>= 0~) Conflicts: libglapi-mesa (>= 0~) Conflicts: libgles2-mesa (>= 0~) E: Error, pkgProblemResolver::Resolve generated breaks, this may be caused by held packages. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1483631 Title: Can't install vivid LTS enablement pack on Ubuntu 14.04 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/mesa-lts-vivid/+bug/1483631/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs