ChrisStocker

I placed the old DSDT back in place after testing. I will run a debug with the new one today.

Keyboard stops working after login password. No trackpad. Thanks. debug_7413.zip

I am pretty sure the Dell Optiplex 3020 has the Realtek ALC3220 audio chip. This is the same as the ALC280 which is supported by AppleALC.kext. I want to say that I used layout ID 11 or 13 on that unit. 3, 4, 11, 13, and 15 are listed. You might want to give them all a try. https://github.com/vit9696/AppleALC/wiki/Supported-codecs

Any chance someone can take a look at my setup again? Still no luck getting the I2c trackpad kext working properly. debug_21415.zip

It is working, but only on an external HDMI screen. I rebuilt my config.plist based off of one of Rehabman's Intel HD 4600 plist and got the same results last night. Is there a way to define the boot display to correct this? Thanks for all your help.

Can you take a look at my High Sierra install? I can't get the Intel HD 4600 working completely. debug_14092.zip

After resuming from Sleep I lost trackpad again. On reboot the pad only slightly moves the cursor then stops. I attached new debug. debug_11276.zip

VoodooI2C & VoodooI2CHID are installed in Clover/Kexts/others. I was just trying out multiple versions. This latest DSDT edit has the trackpad up and working again. You obviously worked your magic as usual. I will keep testing. Thanks mate.

I gave that a try. No difference on boot up or returning from sleep. I installed the 3 voodoo kexts into S/L/E and the keyboard is now functioning properly. I noticed on startup that the voodooI2c controller was going to a sleep state. debug_1077.zip

Nice Yes, they were both initially working fine. Seems after a Sleep/Wake and then a Reboot I lost them both. debug_17286.zip

Keyboard does, but trackpad does not. Thanks for all your help on this. I am just getting into the laptops. CLOVER.zip

It was indeed a Sky Lake CPU with Intel HD 520. I mistyped on my last post. I have fixed the typing failure lol. The trackpad and keyboard aren't working again. I will try different kext versions out to see whats up.

That did the trick. I also had to change AirPortBrcm4360 over to the kext name of "com.apple.driver.AirPort.Brcm4360" in my KextsToPatch section. I also had the device ID for sound defined to 11. It needed to be 13 for the ALC256 sound chip in this unit. Thanks again, I posted my EFI for others minus a CPU SSDT and SMBIOS parameters. I will test some more, but everything seems fine now. This is a Latitude 5480 with Sky Lake CPU, Intel HD 520, and Nvidia 930MX GPU. I have installed a DW1560 for internal Wifi/BT support. 5480.zip

Thanks, that was it. Guess I had not tried that Bios setting yet. Can you help me get the DW1560 working? I am not sure how to properly edit the SSDT that handles that. CLOVER.zip

Anyone had a problem with the system freezing when unplugging or plugging in the charger?