apt-get remove libglitz-glx1 libglitz1
Reading package lists... Done
Building dependency tree... Done
Package libglitz-glx1 is not installed, so not removed
Package libglitz1 is not installed, so not removed
You might want to run 'apt-get -f install' to correct these:
The following packages have unmet dependencies.
  xserver-xgl: Depends: libglitz-glx1 but it is not going to be installed
               Depends: libglitz1 (>= 0.5.1+cvs20060213) but it is not going to be installed
E: Unmet dependencies. Try 'apt-get -f install' with no packages (or specify a solution).