@ggow ,
Is the Miracast fix a bit more complicated then just going back to "using FireOS 5.1.4 update-kindle-37.5.4.4_user_544271020 binaries and boot.img" ?
I am wondering since I tried going back to the 10/21/16 CM12.1 ROM while waiting for the next Fire Nexus release since I thought it was the last CM12.1 ROM to use "update-kindle-37.5.4.4_user_544271020 binaries and boot.img". But I still could not see my Fire TV 1 device that is on the latest PreRooted ROM.
Does anybody know an exact Fire Nexus or CM 12.1 ROM version that you can verify where Miracast is working on a FireTV device ??