The failure from installer matches the following apt-get line:
# apt-get install --install-recommends xserver-xorg-lts-trusty libgl1-mesa-{dri,glx}{,-lts-trusty} libglapi-mesa{,-lts-trusty} The following packages have unmet dependencies: libgl1-mesa-dri-lts-trusty : Conflicts: libgl1-mesa-dri libgl1-mesa-glx : Conflicts: libgl1 libgl1-mesa-glx-lts-trusty : Conflicts: libgl1 Conflicts: libgl1-mesa-glx libglapi-mesa-lts-trusty : Conflicts: libglapi-mesa xserver-xorg-lts-trusty : Conflicts: libgl1-mesa-dri (>= 0~) Conflicts: libgl1-mesa-glx (>= 0~) Conflicts: libglapi-mesa (>= 0~) E: Unable to correct problems, you have held broken packages.
The failure from installer matches the following apt-get line:
# apt-get install --install- recommends xserver- xorg-lts- trusty libgl1- mesa-{dri, glx}{,- lts-trusty} libglapi- mesa{,- lts-trusty} mesa-dri- lts-trusty : Conflicts: libgl1-mesa-dri mesa-glx- lts-trusty : Conflicts: libgl1
Conflicts: libgl1-mesa-glx mesa-lts- trusty : Conflicts: libglapi-mesa xorg-lts- trusty : Conflicts: libgl1-mesa-dri (>= 0~)
Conflicts : libgl1-mesa-glx (>= 0~)
Conflicts : libglapi-mesa (>= 0~)
The following packages have unmet dependencies:
libgl1-
libgl1-mesa-glx : Conflicts: libgl1
libgl1-
libglapi-
xserver-
E: Unable to correct problems, you have held broken packages.