I have two monitors, and I want apps to run and appear on monitor 2 which is actually my primary display. So far my workaround is to come to the PC and press windows-P and select external (monitor 2 only) instead of "extend".
I looked up in the sunshine config file how to specify the display, and added that to the h264 conf. This apparently works, because the openstream server reports the correct resolution. Unfortunately, when openstream launches my game, the text window says :::::extend ::clone and the modes switch back and forth a bit, and the stream halts.
thanks for any suggestions