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Dell Latitude 7490: building OpenCore EFI for Big Sur


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I just updated my 7490 to test the latest Big Sur 11.5.1. Everything seems to work properly except I have screen glitches after boot screen. It happens everytime and the only fix I found is to put the laptop to sleep, after wake up glitches are gone. It also happened on 11.5. Back to 11.4 everything was fine. Strange... any help is appreciated. Maybe some graphics issue underneath. I used @Hervé's files from his guide. Here's my ioreg + oc.

 

Jazzoo’s MacBook Pro.zip EFI.zip

 

Here's the video I recorded - https://drive.google.com/file/d/1tF4ZzK2j0bi6jDZK822odcQ_HTf7OYE9/view?usp=sharing

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Thanks for the tip Baio77! Can I delete one of the SSDT entries in order to clean EFI or it's not working that way ?

 

PS - I found that changing the resolution to 1600x900 also fix the glitches immediately.

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in USB test this 

https://drive.google.com/file/d/10UhZHgUeyTpZ8s0u5KQuGuSioaY14IAK/view

I apologize for this I write, but the purpose is to give you a very good and functional EFI, in your config I see this
All those rename are NOT needed, for sure rename _DSM to XDSM is to be avoided on PCs equipped with I2C 

such as rename ECDV to EC and other rename

Schermata 2021-07-27 alle 13.54.47.png

 

EDIT

 

SSDT PMCR only use on mobo 300+ series, older HW has PPMC in ACPI which is the same, so another duplicate

Schermata 2021-07-27 alle 14.07.46.png

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Ioreg my EFI 

 

I need to do tests, let's start to fine-tune the basic EFI, you'll see that every problem is solved

I am a self-taught user, I need time and tests to be able to solve the various problems but everything works out, it takes patience and time

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