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I ended up getting an app called brightness, and it gives you a slider on the taskbar. Not a proper fix but it worked for me. I no longer have that laptop anymore.
28 lis 2023 · To adjust your MacBook's screen brightness, go to the Apple Menu and select System Preferences > Displays, then click Display. Use the brightness slider to adjust your screen's brightness.
25 gru 2016 · I have this issue on my Dell Inspiron 13 7000 series for very long time. I tried searching Google and Dell support community and I did: Control Panel > Device Manager > Display Adapters > Intel HD Graphics 5500 > Driver > Update Driver > Search Automatically. It fixed.
16 sie 2018 · I successfully installed brightness slider for my Dell Inspiron 15 7559 UHD running high Sierra. Now I want to map F11 / F12 Key for it. So I followed this guide:
20 lut 2015 · Download the latest version of Brightness Slider for Mac for free. Read 7 user reviews and compare with similar apps on MacUpdate.
Mostly, this issue caused by unsupported dgpu not turned off or still loaded under macOS. So you can use -wegnoegpu to hide or SSDT to disable this.
16 sty 2024 · Dell Inspiron 5400 AIO, Windows 11, Suddenly I am unable to adjust my screen's brightness which appears to be set at maximum. The slider on the brightness settings in Windows display settings moves left and right but has no effect.