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[Solved] E5570: need help with touchscreen


ABOFE
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Identify the model and nature of touchscreen (PCIe/IC2 vs. USB) through SysInfo or IOReg. If USB, expect an Atmel device and look here to apply the USB HID Fix which is likely to be necessary.

This is what the touchscreen looks like on my Skylake Latitude E7270:

E7270_Atmel_Touchscreen.jpg

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@ABOFE, if your touchscreen is USB, I expect you'll need to apply the USB HID Fix patch. You can look it up on the Web but this patch is mandatory since Big Sur (because Apple then dropped support for older USB technology) and it's missing in the OC config you uploaded in post #1. Please follow the link I gave you above and apply the patch in your config accordingly. Make sure you've properly mapped all your USB ports, including the internal ones of course. It's as simple as that...

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