Hi all,

I'm a new user, and I don't know my way around Linux very well (just enough to be dangerous).
I've installed KDE Neon, I've got it all running and updated but I cannot set the correct resolution.

In Display configuration the highest I can set is 1920x1080@60Hz but I need 3440x1440@75.

I have searched, but what I've been able to find is either very old, not quite the same issue, or did have the same issue but the fix didn't work.
I have tried setting this as a new mode in xrandr but no new options showed up in Display Configuration after a log out / in.

Any help would be appreciated.
Please speak to me like I've never even heard of Linux before as that's about as for as my knowledge goes here....
Up for learning though.

Forgot to add, I'm just running this on an old think center using Intel HD Graphics 4600.