Question Can't display 4k despite knowing my hardware can...

May 13, 2020
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So I inherited an HP 15-ac161nr Notebook, and clean installed Windows on it. I boot up Windows, and plug in an HDMI cable into my laptop and monitor. Works great, except I can't get 4k resolution to work, the best option is 1920x1080. My HDMI cable is definitely capable of 4k@30Hz, so I know that's not the problem. I decided it was my bad integrated Graphics and left it alone...

But, after deciding to dual boot Linux, I realize that's not the case. Linux allows me to display at 4k@30Hz on clean install no problem. Same hardware, absolutely nothing changed, except the OS.

So what gives?
 
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