HDMI does not work on ubuntu 16.04

I have a jetson tk1 card with ubuntu 14.04 where all its ports worked and I updated it to ubuntu 16.04 and after restarting it stops recognizing the HDMI port, could anyone help me solve it?

Is your issue on tx1 or tk1? This is a tx1 board.

You’d want to put this on the TK1 board instead of the TX1, but some info: If you used the Ubuntu mechanism for upgrade from 14.04 to 16.04, then this will do it every time. There is, however, this thread to look at: