Dell Latitude 7480 (Core i7-7600U): Grey screen when trying to install Ventura or Monterey

[deselitor]

Hi all,

 

Dell Latitude 7480 - Core I7 - 7600U
Intel HD graphics 620
SSD: LITOEN CV3-BD512- 11 SATA 512GB

FHD screen: 1920x1080 (non-touch)

 

I have a grey screen with a moving mouse cursor when I boot from a USB installer (Ventura) or (Monterey) recovery image downloaded from here. So it seems to "boot up". But instead of showing any UI, it shows a grey screen.

 

 

 

I have tried the attached configuration and also the one in this thread. However, both have the same results.

Then I read this thread. and I injected my EDID with the hex data obtained as per this link, also removed fbmem and stolenmem from config.plist, and executed setup_var 0x795 0x2 and setup_var 0x796 0x3 in a modified GRUB shell. But unfortunately, it still doesn't work.

 

 

Is there another obvious thing to try? I have attached the current state of the config.plist. 

 

config.zip

[Hervé]

KBL frame buffer layout 0x591B0000 should work Ok but I suggest you revert to the usual layout 0x59160000 instead, i.e. replace "00001B59" by "00001659" against property AAPL,ig-platform-id key. Remember to reset NVRAM at OC Picker when you reboot after changing your config file.

 

I also suggest your clear out all those commented out lines you've got in your config to clean things up:

 

but you must reinstate the line that allows patching of connector con1  and probably the 2 lines that patch DVMT settings, i.e. remove the heading '#' character:

[deselitor]

I change KBL frame buffer layout to 0x59160000 by change the AAPL,ig-platform-id key to be "00001659". 

also, I reinstate the line that allows patching of connector con1 and probably the 2 lines that patch DVMT settings and clear out all the remaining commented out lines from config file.

Then, I reset NVRAM at OC Picker when I reboot after changing the config file.

But unfortunately, it still doesn't work. I have attached the current state of the config.plist. 

 

 

config.zip

[Hervé]

It's probably something else in your OC config. What if you enable quirk SyncRuntimePermissions?

Check your BIOS settings too (and have Legacy Options ROM disabled).

[deselitor]

My BIOS Setting:

 

Disable:

Secure Boot -> Secure Boot Enable -> Disabled

Intel Software Guard Extension -> Intel SGX Enable -> Disabled

General  -> Advanced Boot Options -> Enable Legacy Option ROMs -> Disabled

 

Enable:

System Configuration -> Integrated NIC -> Enabled     But not tick the entry:    Enable UEFI Network

System Configuration -> SATA Operation -> AHCI

System Configuration -> Thunderbolt Adapter Configuration -> Enable all entries and select Security level - No security

 

as suggestion, I enable quirk SyncRuntimePermissions.

I reset NVRAM at OC Picker when I reboot after changing the config file.

But unfortunately, it still doesn't work. I have attached the current state of the config.plist. 

 

config.zip