Well, it does if you install nvidia-drivers via Portage, but I can't check what Entropy does as I don't have access to a machine with Entropy on it at the moment. Why don't you check by uninstalling nvidia-settings, and then re-installing nvidia-drivers? Make sure you install the same version that you have currently got installed, though! If it doesn't, you might want to file a bug report. I haven't reinstalled nvidia-drivers on my nettop for ages, so I don't recall. As an aside, the AMD equivalent of nvidia-settings (amdcccle) has to be installed separately when one installs ati-drivers.