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HP Spectre x360 14 ea-1xxx

After updating the System BIOS to version F.28 on a Spectre X360 14-ea1xxx the Adaptive Brightness and Adaptive Contrast options in Settings--System--Display are missing on Windows 11.

 

I think that this version completely breaks the sensor for ambient light. I tried this in both Windows 11 and Linux so it's not an OS problem. The sensor in Linux is not detected at all. It was previously working fine with Version F.27.

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