1

This is a Dell system with Intel HD4600 onboard graphics. It has 2 physical DisplayPorts and a single physical VGA port; it has NO physical HDMI ports.

As part of trying to set up a 4K TV, I noticed that having used a Displayport/HDMI cable/converter, xrandr claims that HDMI-1 is connected but DP-1 is disconnected. Should I be using xrandr to disable HDMI-1 and enable DP-1 or is this just how things work when using a DisplayPort/HDMI adapter?

BTW, "if it ain't broke..." doesn't apply here as I've not yet managed to get 4k out of this system :-(.

1

The answer is that because the TV only has an HDMI input, the DisplayPort adapter falls back to HDMI mode and creates a virtual 'HDMI' port to reflect this.

The answer to my 4k issue was also that the graphics chipset only supports 4k/24Hz (not 4k/50Hz or 4k/60Hz); the key piece of info is that in HDMI mode the chipset only supports HDMI 1.4 which cannnot support the higher refresh rates.

Using cvt and xrandr to create/set a 4k/24Hz set up worked a treat.

| improve this answer | |

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.