I already got a lot of the necessary information from a post by Pat Regan that you should definitely read before starting to play around with your settings!
At first I tried to configure my new QX2710 with my old monitor connected, but I figured I might aswell just do it remotely. So I connected to my computer from my laptop via SSH and played around with the xorg.conf. After applying the changes I’d restart lightdm (
sudo service lightdm restart) until it worked.
In the meantime my monitor showed me this:
I ended up using HorizSync 89.52 - 160.0, VertRefresh 59.96 - 120.0 and a Modeline generated by
cvt. Here’s the xorg.conf.
Here’s a comparison of screen resolutions before - after:
I can finally watch 1080p videos without downscaling!1!!