Comment 4 for bug 1191563

I can confirm this bug in Ubuntu 12.04.2 LTS (originally 12.04.1, then upgraded to Quantal HWE). The workaround in #2 worked for me but during installation I encountered some errors which had the following form:

      ...
    ERRORS: clementine depends on libgl1-mesa-glx | libgl1; however:
      Package libgl1-mesa-glx is not installed.
      Package libgl1-mesa-glx-lts-quantal:i386 which provides libgl1-mesa-glx is not installed.
      Package libgl1-mesa-glx-lts-quantal which provides libgl1-mesa-glx is to be removed.
      Package libgl1 is not installed.
      Package libgl1-mesa-glx-lts-quantal:i386 which provides libgl1 is not installed.
      Package libgl1-mesa-glx-lts-quantal which provides libgl1 is to be removed.
     compiz-plugins-main-default depends on libgl1-mesa-glx | libgl1; however:
      Package libgl1-mesa-glx is not installed.
      Package libgl1-mesa-glx-lts-quantal:i386 which provides libgl1-mesa-glx is not installed.
      Package libgl1-mesa-glx-lts-quantal which provides libgl1-mesa-glx is to be removed.
      Package libgl1 is not installed.
      Package libgl1-mesa-glx-lts-quantal:i386 which provides libgl1 is not installed.
      Package libgl1-mesa-glx-lts-quantal which provides libgl1 is to be removed.
    ....

Fortunately when the installation completed these dependency were resolved on their own.

This is the second time I encounter serious dependency issues while trying to install a hardware enablement stack. (previous issue: https://bugs.launchpad.net/ubuntu/+source/xorg-lts-quantal/+bug/1125413). I sincerely hope that these problems will be fixed by the next HWE release cycle.