DELL XPS 9360 UHD620 [OC 6.3]

[Mrgeque]

would you be so kind to share with me the whole EFI?

are you using Big Sur or Catalina? if the issue is in Big Sur, you may need to patch the edid of your screen to refresh at 48hz

 

[ssuper2k]

It doesn't matter BS or Catalina, same issue: internal display not detected/presented after boot

If I start the laptop witOUT the external screen, all I see is this:

Then I connect the EXTERNAL display, and all is fine..

But INTERNAL display goes BLACK

I'd appreciate more help than just linking me to guides I tried&/read 1000 times already

I'm attaching my EFI&logs:

 

[Mrgeque]

It doesn't matter BS or Catalina, same issue: internal display not detected/presented after boot

If I start the laptop witOUT the external screen, all I see is this:
View attachment 498653

Then I connect the EXTERNAL display, and all is fine..
View attachment 498654
But INTERNAL display goes BLACK

I'd appreciate more help than just linking me to guides I tried&/read 1000 times already

I'm attaching my EFI&logs:

try adding -igfxtypec and igfxonln=1 to bootargs

 

[ssuper2k]

ok, just tried that, made Zero difference
so still Only External monitor when iGPU is HW accl

any more ideas to try?

thanks

 

[Mrgeque]

ok, just tried that, made Zero difference
so still Only External monitor when iGPU is HW accl

any more ideas to try?

thanks

maybe try to only add 'framebuffer-con0-busid' set to '00000000' in device properties, which will specify the laptop screen as internal

 

[Mrgeque]

ok, just tried that, made Zero difference
so still Only External monitor when iGPU is HW accl

any more ideas to try?

thanks

try Intel UHD 620 (AAPL,ig-platform-id 00009B3E, device-id 9B3E0000) see if it helps

 

[Mrgeque]

would you be so kind to share with me the whole EFI?

guide in my sig has my EFI. try it out and report back