Dell 9570: 4k@60Hz via HDMI

[rdzak]

First of all thanks for this amazing work!

Now the question: is there a way to enable 4k monitor refresh rate to be higher than 30Hz via HDMI?
It works in Windows so not a hardware issue with cable or screen. I have tried setting it up while using Intel or Nvidia but no luck.

Thank you!

[stockmind]

It works in Windows

Are you sure about this statement?
https://www.reddit.com/r/Dell/comments/646b7z/can_the_xps_15_9560_drive_external_4k_monitor_at/

I can't get 60hz via HDMI too as it should be a 1.4v (so no 60hz@4k), but it should be possible via USB-C/Thunderbolt to DisplayPort

[rdzak]

Apologies for the confusion. I'm referring to 9570 model actually.

[stockmind]

EDID from monitor maybe wrong

https://devtalk.nvidia.com/default/topic/939971/linux/4k-60hz-works-in-windows-not-in-linux-workaround-found-/1
https://www.reddit.com/r/linuxmasterrace/comments/7lsg5w/trying_to_get_4k_60hz_working_on_my_fedora_27_htpc/du80b4j/
https://www.reddit.com/r/linux/comments/7w4tnv/how_i_got_my_4k_monitor_working_at_60hz_in_linux/

Those may help you but i don't have any hardware with a hdmi 2.0 to test it out yet