i\'m working on a Minix NEO X8-H (Android media center, 4.4.2) and i need to send HDMI-CEC command to TV: when my App receives a call i want to change automatically the TV Sourc
First of all, very impressive reverse engineering work!
Secondly, I'm facing a similar issue (but with a non Minix product). Have you tried upgrading to a newer firmware, such as this one:
http://minixforum.com/threads/x8-x8-plus-x8-h-official-firmware-004a-not-for-x8-h-plus.5567/
I am suggesting this as a possible solution, because one of the issues it fixes is this:
Fixed HDMI-CEC multi devices issues
This means the device is not only a "slave", but also a "master" (i.e. can send commands to other hdmi devices).
Please note that as stated in the link, it is not intended for the plus version.
Good luck!