The cord cuts back — Linux users can't hit the same resolutions and speeds as Windows—or DisplayPort. Getty Images Any Linux user trying to send the highest-resolution images to a display at the fastest frame rate is out of luck for the foreseeable future, at least when it comes to an HDMI connection. The licensing group that controls the HDMI standard, the HDMI Forum, has reportedly told AMD that it does not allow an open source implementation of the HDMI 2.1 (or HDMI 2.1+) specification, bl...