How to fix terrible jitter on screen when using a 16.0" 120Hz display?
We're trying to use an UP Xtreme (the Celeron version) to run the Microsoft HLK test on a 16.0" 120Hz display.
For some reason there is terrible jitter on the screen. See the video in the linked zip file to see what I mean.
The jitter happens in the BIOS screen, as well, so I don't think it is a driver problem.
This exact screen works without jitter when connected to a Dell PC with a 7th gen Intel processor. (The integrated graphics controllers in 7th gen and 8th gen Intel processors are almost identical.)
The display also worked without jitter when I connected it to a Lenovo laptop with 11th gen Intel processor and integrated graphics.
A version of this display that runs at 60Hz worked fine on the UP Xtreme. But at 120Hz refresh rate it jitters.
I reset the BIOS settings to default, but that did not fix the jitter. Like I said, the display jitter is visible in the BIOS screens, so I don't think this is a driver problem.
How do we fix the jitter on the display?
Please help! We need to run the HLK tests as soon as we can, but the jitter is making it impossible.
The linked zip file has reports from CPU-Z and Intel System Support Utility for both the UP Xtreme and the 7th Gen Intel PC.
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