vanquybn Posted June 3, 2023 Share Posted June 3, 2023 Hello, My Hardware: Dell precision 7550. I got issue with backlight control, it work fine if i turn the HDR on. When the HDR turned off, I can drag the brightness slider but the bright on screen does not change. I have tried all ig-platform-id for CFL/CML but the same result. Please advise. You can see my EFI at: https://github.com/acidanthera/bugtracker/files/11624533/EFI.zip IOReg20230601.zip Link to comment https://www.insanelymac.com/forum/topic/356868-backlight-control-issue-on-i9-10885h-it-only-work-on-hdr-option/ Share on other sites More sharing options...
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