Does Gnome Shell use Mutter?

In Wikipedia is written that Gnome Shell in Gnome 3 uses Mutter window manager.

But ps x | grep mutter shows that Mutter is not running. Moreover I had experience with working Gnome Shell before I installed Mutter.

Does Gnome Shell really use Mutter? Which WM are used and which can be used with Gnome Shell?

Asked By: porton

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Yes, mutter is used by gnome-shell but it’s used as a library. The mutter binary is just a tiny program that links against libmutter.
You could try like this:

lsof | grep mutter
Answered By: don_crissti