When attached, the phone does rotate the home screen, which it does not do normally, so I think that the adapter is working.
I have Cyanogenmod android 4.4.4. There are no settings for hdmi, no Overscan like stock OS (there is only Expanded Desktop, whatever that is).
Is there some setting I have overlooked? Is there something else I should do to get the signal out to the monitor? Is my adapter not working?