Poor smoothing on 1080p second monitor from laptop with Hi-Res display

[GarethHubball]

I think the title pretty much sums it up - no matter how many times I go through the cleartype tuner on the external monitor, the text on it always looks jagged and not crisp at all, images aren't much better either. My laptop screen is fine. For reference the laptop is a Dell XPS13 with a 3200x1800 screen and the external monitor is a Dell one as well with a 1080p resolution connected via a DVI-HDMI cable into a Thunderbolt 3 dock.


Can anyone please help as this is driving me barmy!

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