Windows 11 screen brightness doesn't show up and performance reduction when unplugged from external monitors

V

Vũ Hoàng Thi

I'm using Windows 11 23H2 on laptop, the screen brightness slider has disappeared. This has happened very often and I usually had to reset/fix windows in order to get it back. I usually use my laptop with 2 external monitors, which worked fine, and when using the laptop alone, there is a lot of issues like slower processing despite the laptop being plugged in (lags a lot in photoshop even on a 1000px x 1000px 72ppi canvas) and the disappearance of the brightness slider in the action menu. When I plug back in into the 2 external monitors (both 2k 144hz) with the laptop screen disabled, the perf

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