Jake Lo

Replace with this SSDT SSDT-BRT6.aml.zip

Did you set the order according to my screenshot? Change OSID must go before change_OSI

Are you sure it's just black screen. Do you see SSD activity? Try shining a flashlight to the display, see if you see anything faintly? Strange your system just shows "MacBook", not MacBookPro15,2 like the SMBIOS you're using. Try enabling in the Config under kextToPatch "DellSMBIOSPatch"

check the Config file, do you have Boot set to Fast? Make sure to set it to a Timeout #

Yes, but make sure to update to latest Clover, update at minimum Lilu.kext and Whatevergreen.kext

The patch I linked fixes the issue you're having due to IASL bug, you might be using a different version of MacIASL than I am. With that said, you don't need to patch your DSDT for the Fn key for Brightness. I assume you have the Latitude 3480? Add the 3 patches in those order, you already have the 1st 2 but needs to be reordered, then add the 3rd to your Config file. Add the attached SSDT to the Patched folder. Finally, you'll need to use VoodooPS2Controller.kext SSDT-BRT6.aml.zip

Have you tried this Attach the full Origin folder if you need further assist

Follow the well known Catalina requirement here Your config already has it, just need it enabled. Hint: ECDV

No you have a Synaptics Touchpad, you already have the kext on your setup.

It's an USB touchscreen - Synaptics Touch Digitizer V04 If it's not working OOB, then might not be supported. You could try a 3rd party app - https://www.touch-base.com

Use Karabiner-Elements app, see my example here Wifi toggle button has not work on MacOS for a long time so just disabled it from the preference.

Looks like you don't have brightness slider and USB management is not set up and HDMI might not be working in your current config Here, replace your Config and ACPI folder E5270_FixSleep.zip

post debug file and output after running this in terminal log show --start 2020-01-11 --style syslog | fgrep "Wake reason"

IOREg not attached run this and attach the output https://raw.githubusercontent.com/black-dragon74/OSX-Debug/master/IORegistryExplorer.zip

Replace this DSDT into /E/C/A/Patched DSDT.aml.zip

Don't think the one you mentioned is supported either.

post debug file

Is your touchscreen USB or I2C?

No, last support for SandyBridge HD 3000 is HS. That said you could install Catalina but have to resort to using HS graphics files but will still encounters glitches.

Your Intel Wifi is not supported as expected, replaced with DW1510 for Wifi Only or DW1550 for Wifi / BT combo Replace files into /EFI/Clover after you have Clover loader installed E5420_LowRes.zip

What's the display resolution? What's the internal ethernet? What's the Wifi device? Intel is not supported!!!

On my Dell, it's controlled by the Fn+(Prtsc) for WLAN/WWAN/BT. I think on your keyboard it's Fn+F8

Yes. In your EFI, make sure you have the Microsoft folder and in Config file, under Boot, you have Timeout set a number of seconds you want to count down

@skyfly555 See if you have accidentally toggled it off with the Fn keys

Looks good, although I do recommend removing NullCPUPowerManagement.kext