Just to clarify my previous post. These packages can't be installed if you do a fresh install of Ubuntu 14.04.2. If you install Ubuntu 14.04 (the first iso that came out of this release) you can install the packages and steam as well. I just did this.
These are the packages I have installed even after a dist-upgrade and subsequent change of version to 14.04.2 in my /etc/issue ii libgl1-mesa-dri:amd64 10.1.3-0ubuntu0.3 amd64 free implementation of the OpenGL API -- DRI modules ii libgl1-mesa-dri:i386 10.1.3-0ubuntu0.3 i386 free implementation of the OpenGL API -- DRI modules ii libgl1-mesa-glx:amd64 10.1.3-0ubuntu0.3 amd64 free implementation of the OpenGL API -- GLX runtime ii libgl1-mesa-glx:i386 10.1.3-0ubuntu0.3 i386 free implementation of the OpenGL API -- GLX runtime -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1424263 Title: Broken dependencies To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/mesa/+bug/1424263/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs