I'm currently using ARHD 6.1 GE (4.4.2 GPE), Chromecast 1.7.4, Google Play Services 5.0.84 and dongle firmware 17250.
Has anyone gotten screen casting to work? When I try through the Chromecast app it says "connecting", the TV screen goes black, then the app says "disconnecting" and the TV goes back to the normal Chromecast desktop. In my notification list it continues to say "casting to screen" and tapping "disconnect" doesn't make it go away, I have to force close Google Play Services. If I go to Settings->Display->Cast Screen it just says "no nearby devices found". Other apps work with Chromecast, just not screen casting.