Ok with a older image I can reproduce it, it seems libgl1-mesa-dri is part of the ubuntu-desktop task, just like libgl1-mesa-dri-lts-trusty. Installing both will fail, and libgl1-mesa-dri should be removed from the ubuntu-desktop task.
Ok with a older image I can reproduce it, it seems libgl1-mesa-dri is part of the ubuntu-desktop task, just like libgl1- mesa-dri- lts-trusty. Installing both will fail, and libgl1-mesa-dri should be removed from the ubuntu-desktop task.