[tandr]

I somehow cannot make same setup HP work with 4k@60Hz at all - 4k@30Hz works, but not 60Hz. Would you be kind an post screenshot (link to an imgur.com) showing that this indeed, is possible, and I shall have hope? Also, what monitors do you have, sorry?

[vladvasiliu]

Best I can do is show you the output of xrandr, I don't run Windows on that computer. https://pastebin.com/raw/8W4wK2Qj

The display is an LG, can't remember the model, but it worked with multiple other displays, HP, Dell, etc.

Your issue may be related to the connection. The limitation of 30 Hz makes me think you're connecting via HDMI. If that's all you have, you're SoL.

4k@60 requires HDMI 2, but Intel CPUs only recently have got that. 8th gen certainly doesn't have it.

You need DisplayPort for this to work. Laptops don't often have DP connectors, but they may have USB-C and/or Thunderbolt with DP alt-mode. This is what I use, hence the DP-xxx output name.

If you look closely, there's the DP logo next to the USB-C connector for my particular model: https://wu-tc-shop.com/WebRoot/Store11/Shops/a31626df-5333-4...

[tandr]

Thank you for such extended answer. I do have HDMI on it, so I guess it will have to wait until next hardware refresh cycle.