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[Guide] Dell Inspiron 15 7559 (skylake)

Greetings, I had some problems with that EFI
When I boot with HDMI plugged, my laptop screen goes blanc.
The OC boots creen resolution goes too big
I'm using Bios 1.2.4, and tested 2.9, 3.0 and 3.1
I have some UEFI and Legacy issues, sometimes boots, sometimes does not.
My 7559 is i7 non 4k.
Thanks

In time, Bios 1.3.1.
I have to boot, change do Legacy, then reboot and change do UEFI (without legacy), after that the system boots ok.
Hi. What could cause this? I have a friend who needs to do the same on his Dell 7559...
 
I kinda got it working now, using legacy boot instead of UEFI, but instead of going straight to the Opencore menu it takes me to this menu instead:

View attachment 494294

I have to go into boot manager and pick the efi boot file manually.

Did anyone else have this problem?
Same here, did you resolved it?
 
Hi. What could cause this? I have a friend who needs to do the same on his Dell 7559...
I don't know, they call it Grey boot manager screen on cold
1604589782855.png
 
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Thank you all! I finished move to OpenCore and BigSur.
At the moment, fixed all issues actual for me except 4k@48Hz.
This config is a compilation of the config from the first post and @slipanot config
What is added or changed:
1. alcid = 16 - need to work 2.1 speaker with subwoofer
2. alc-verb_jack_fix or ALCPlugFix-Swift - two methods for fix hotplug headphones jack
3. enabled SSD trim by deafult
4. changing igpu device property (4k@60Hz on Catalina, 4k@48Hz on Big Sur, HDMI, 2048Mb VRAM)
5. SSDT-DGPU.aml - Nvidia dGPU off
6. SSDT-BTNB.aml - Backlight fn buttons work together with patch:
change Method _Q80 to XQ80, pair with SSDT-BTNB.aml
change Method _Q81 to XQ81, pair with SSDT-BTNB.aml
7. Using MacBookPro13,2 (required for working HDMI and Big Sur correctly and smoothly (BigSur had a lot of lags with MacBookPro13,3)

Not used and not tested by me:
1. Built-in card reader (before I used Sinetek-rtsx.kext but stability and speed did not suit me)
3. DRM on Safari

Also I disabled SMCDellSensors.kext as it causes sound lags for me.

If you have Secure Boot Violation error read this post:
I tried to install Big Sur after some time the display go black and I need to shut down.
any suggestions
 

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  • IMG_2897.jpg
    IMG_2897.jpg
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I tried to install Big Sur after some time the display go black and I need to shut down.
any suggestions
4k screen problem.
 
Greetings,
I've tried CLOVER and OC, both didn't boot as UEFI (LEGACY ENABLED AND DISABLED EITHER).
Just boot as LEGACY.
Bios 124
Thank you!
 
I did it. I can't check hdmi, but most likely it should work, and most importantly, I got 4k@60Hz in BigSur. As a result, it remains to solve a few small problems with sleep and getting out of sleep and the config will be completed.
Screenshot 2020-12-22 at 21.35.jpg
Screenshot 2020-12-22 at 21.37.jpg
 

Attachments

  • OC-0.6.4-7559_4k-60Hz_v.2.zip
    6.7 MB · Views: 123
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