lufeig Posted June 12, 2021 Share Posted June 12, 2021 Hello, I've been researching for days about Fn+F11 and Fn+F12 to control screen brightness on Big Sur, and I noticed that this thread is the most up to date I could find, with laptops with similar configurations of mine. I have a Dell 5378 laptop on Big Sur, i7 7500U, UHD 620, OpenCore 0.7.0, struggling for days to solve this. It works with Fn+S and Fn+B keys, but not Fn+F11 and Fn+F12. I've tried SSDT-BRT6 and patch, the SSDT-OCWork-dell, Brightnesskeys kext... nothing works. I attached my current EFI folder and my system DSDT table from ACPI (MaciASL 1.6.1) Could you give some directions on how to solve this, please? dsdt.aml.zip EFI.zip Link to comment Share on other sites More sharing options...
Moderators Jake Lo Posted June 12, 2021 Moderators Share Posted June 12, 2021 Give this a try. Post IOReg file with IORegistryExplorer.app v2.1, not 3.0+ after updating the files Inspiron 5378.zip 1 Link to comment Share on other sites More sharing options...
lufeig Posted June 13, 2021 Author Share Posted June 13, 2021 @Jake Lo it worked with the config.plist and the SSDT-5378.aml you provided. thank you very much! can I re-enable some of the other ssdt files and their respective patches that I have? I attached the IOReg as requested. inspiron 5378 ioreg.zip Link to comment Share on other sites More sharing options...
Moderators Jake Lo Posted June 13, 2021 Moderators Share Posted June 13, 2021 No need, all those patches are already included in that 1 SSDT. Is there something that's not working? Link to comment Share on other sites More sharing options...
lufeig Posted June 13, 2021 Author Share Posted June 13, 2021 @Jake Lo no, everything I tested works just like before! I'll try to understand how you merged them all, maybe I could learn something! thank you very much for your prompt help! Link to comment Share on other sites More sharing options...
Baio77 Posted June 13, 2021 Share Posted June 13, 2021 Try this EFI, it should activate I2C, keyboard brightness control. modified SSDT to be able to boot even in dual boot with Windows. If you get to the new desk ioreg EFI.zip 1 Link to comment Share on other sites More sharing options...
lufeig Posted June 13, 2021 Author Share Posted June 13, 2021 @Baio77 thanks for your help, I really appreciate it! but everything is working with the ssdt and config.plist that @Jake Lo provided, and I managed to break the big ssdt in smaller, individual ssdt files. windows was removed from the laptop, it is installed only on my desktop now. Link to comment Share on other sites More sharing options...
Baio77 Posted June 13, 2021 Share Posted June 13, 2021 In this ioreg it is evident that the trackpad does NOT work as it should, but if that's okay with you, no problem Link to comment Share on other sites More sharing options...
lufeig Posted June 13, 2021 Author Share Posted June 13, 2021 @Baio77 thanks again for advising. I will try the EFI you provided and will report asap. @Baio77 please find attached the full ioreg file booting with the EFI you provided. I don't know if it makes any difference, but I have a trackpad and a touchscreen. thanks for your help! 1. brightness keys now work with F11 and F12, not Fn+11 and Fn+12 as before. 2. ioreg MacBook Poor de Fernando.zip Link to comment Share on other sites More sharing options...
lufeig Posted June 14, 2021 Author Share Posted June 14, 2021 (edited) EDIT: the strange thing I noticed: - if I use ssdt-xosi + rename _osi and osid patches, brightness keys are F11 and F12 and I2C0@15 ioreg is completely filled. trackpad and touchscreen work fine. - if I use ssdt-gpi0 (ssdt-xosi and patched removed), or if I use none of them, brightness keys are Fn+F11 and Fn-F12 and I2C0@15 ioreg is almost empty, just like I2C1@5,1. trackpad and touchscreen work fine. Edited June 14, 2021 by lufeig sorry for double posting, I tried to merge the messages, but no success Link to comment Share on other sites More sharing options...
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