video won't start if console open

[CarlFK]

If you connect to the serial console before the video device, you don't get video.

If you drop the serial console connection, then you get video, and then you can hook up the console again and change pattern to input0 or whatever.

(06:50:25 PM) CarlFK: mithro: can you help me debug why gst doesn't seem to be reading from hdmi2usb /dev/video0 ?
(06:50:43 PM) mithro: CarlFK: do you have a terminal open to the serial console?

(06:52:32 PM) mithro: CarlFK: the video won't start the first time if you have the console open at the same time
(06:53:20 PM) CarlFK: Yes!!!
(06:55:30 PM) CarlFK: thank you. training is happening.

[mithro]

This is a duplicate of #281