I have been wondering this exact thing. I see that it works great when the SP4 is oriented horizontal. But will it also work when you are holding the SP4 in portrait mode? Have you tried it? Based on your question, it sounds like you have and were not able to get it to work.
In testing it works but the login screen will stay in landscape mode....however the camera does recognize me at 90 degrees off. Once you login at 90 degrees off then the desktop rotates to portrait.
In testing it works but the login screen will stay in landscape mode....however the camera does recognize me at 90 degrees off. Once you login at 90 degrees off then the desktop rotates to portrait.