Hello, first I have installed Big Sur according to Dortania's instructions. After fixing the errors, I consulted and took @Hervé (https://osxlatitude.com/forums/topic/8883-dell-latitude-e6230-with-i5-3340mi7-3540m-hd4000-and-1366x768-lcd-el-capitansierrahigh-sierramojavecatalinabig-sur/) DSDT.aml file to add to my EFI and patched HD4000 1600x900 for my device. The functions seem to work quite well, but there are 2 problems that are problematic for me:
1. the keyboard and trackpad I've been looking for and have tried a lot of kext (including Dr.Hurt) but this function still can't work. I don't know if @Hervé DSDT.aml is blocking that functionality since I am new and not code savvy
2. Sleep function works, but when the device wakes up, some functions will fail such as webcam, sometimes the machine hangs Can anyone have a good plan for me. I thank you very much Sorry for English not my language.
Attach my EFI below: https://mega.nz/file/J85FmCrB#NqhR_WXH2jq_jwyfREAu9hyUZUuivIdS9RimYXoCHrw
Specs:
i5-3320M
RAM 8GB
HD4000 + NVS5200
1600x900
Wifi DW1520
Audio IDT 92HD93BXX
touchpad ALPS