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[BUG] Black screen 3 minutes after booting, CoffeeLake UHD 630

Joined
Aug 7, 2018
Messages
114
Motherboard
Asus TUF FX504GE (Clover)
CPU
i7-8750H/HM370
Graphics
UHD 630, Nvidia 1050ti, 1920x1080
Mobile Phone
Android
Hi

Encountered a black screen(backlight off) issue during boot? Coffeelake Hardware? Don't turn off your Laptop yet. Wait for 3 minutes and relax. The screen might come up. If this happens, we are on the same boat.

As for me, I have properly installed AppleBacklight control as told in the guide here: https://www.tonymacx86.com/threads/guide-laptop-backlight-control-using-applebacklightinjector-kext.218222/
It is working fine for me. Sleep is causing no problems. The DDGPU is disabled.

I encounter a Black screen(No backlight) just after boot up from Mojave drive. The thing is that after exactly 3 minutes the backlight comes up. The hardware is as shown in my bio. Heard some other people are also facing this issue. Please drop comments below if you have the same problem or have found workarounds.
 
Joined
Sep 19, 2018
Messages
25
Motherboard
MSI gv92 8re
CPU
i7-8750H
Graphics
gtx1060 | UHD 630
Mac
Mac Pro
I have used the same guide, but my laptop screen takes 2min to boot up but the external screen, w/ nvidia, boots up straight way.

I think @parasthakur37 made it work with the follow - BUT remember that Beta branch merged into master yesterday (for both). Use master.
Yes. You need to switch to beta branch and use the three things.
1. AppleBacklightInjector.kext (put in S/E)
2. The beta kext patch (put in config.plist/KextsToPatch)
3. Finally the beta ssdt.aml to CLOVER/acpi/patched.
4. Reboot and then run sudo kextcache -i /
5. Reboot again.
Profit
 
Joined
Sep 19, 2018
Messages
25
Motherboard
MSI gv92 8re
CPU
i7-8750H
Graphics
gtx1060 | UHD 630
Mac
Mac Pro
I also have inject EDID w/ productID 0x9c7c - It have improved the boot by 1 min - give it a go!!!
 
Joined
Aug 16, 2016
Messages
6
Motherboard
Asus ROG STRIX GL503GE (UEFI)
CPU
i7 8750H
Graphics
HD 630 / GTX 1050 Ti 1920x1080
Mobile Phone
Android, iOS
I also have inject EDID w/ productID 0x9c7c - It have improved the boot by 1 min - give it a go!!!
Do you mean 1 minutes is the backlight takes 1 minutes to back normal instead 3 minutes?
 
Joined
Jan 26, 2018
Messages
154
Motherboard
MSI GV62 8RE (HM370)
CPU
i7-8750H
Graphics
UHD630 & GTX1060(non MAXQ) 1920x1080
Mac
MacBook Pro
I have used the same guide, but my laptop screen takes 2min to boot up but the external screen, w/ nvidia, boots up straight way.

I think @parasthakur37 made it work with the follow - BUT remember that Beta branch merged into master yesterday (for both). Use master.
Nope, sadly, its still an issue for people with 8750H.
 
Joined
Dec 8, 2011
Messages
446
Motherboard
Razer Blade 15 - Clover
CPU
i7-8750H
Graphics
UHD 630/GTX 1060 - 1920x1080
Mac
MacBook Pro
Mobile Phone
Android
Same issue here, Razer Blade 15 i7-8750H with the Intel UHD 630 graphics.

Didn't have the issue on High Sierra with the faked Kabby Lake nonsense, but didn't have brightness control. Did a test upgrade to Mojave on a separate partition and now I have brightness control plus the 3 minute black screen on boot :lol: Traded one issue for another.

Hopefully we can get it figured out! I've been doing some digging and playing around with modifying some patches but to no avail thus far.
 

RehabMan

Moderator
Joined
May 3, 2012
Messages
191,075
Motherboard
Intel DH67BL
CPU
Core i7-2600K
Graphics
Intel HD 3000
Mac
MacBook Air
Mobile Phone
iOS
Same issue here, Razer Blade 15 i7-8750H with the Intel UHD 630 graphics.

Didn't have the issue on High Sierra with the faked Kabby Lake nonsense, but didn't have brightness control. Did a test upgrade to Mojave on a separate partition and now I have brightness control plus the 3 minute black screen on boot :lol: Traded one issue for another.

Hopefully we can get it figured out! I've been doing some digging and playing around with modifying some patches but to no avail thus far.
Brightness guide:
https://www.tonymacx86.com/threads/guide-laptop-backlight-control-using-applebacklightinjector-kext.218222/

Note that when spoofing KabyLake on CoffeeLake, you will need to use a custom LMAX (0x56c) in SSDT-RMCF.aml.
 
Joined
Aug 7, 2018
Messages
114
Motherboard
Asus TUF FX504GE (Clover)
CPU
i7-8750H/HM370
Graphics
UHD 630, Nvidia 1050ti, 1920x1080
Mobile Phone
Android
Setting plugin type true creates trouble with sleep. I don't know how to check if CPUPM is implemented or not. Please tell how to check. Also, one workaround I have found for backlight is that after waiting for 30 seconds(you have to make a guess for how much time it takes for your device to reach login screen) from moment the screen turns off, put your device to sleep using the sleep button combination and then waking it up(using mouse movement or pressing a keyboard key) gets it working. So, you can get it working in under 1 minute.
 

RehabMan

Moderator
Joined
May 3, 2012
Messages
191,075
Motherboard
Intel DH67BL
CPU
Core i7-2600K
Graphics
Intel HD 3000
Mac
MacBook Air
Mobile Phone
iOS
Setting plugin type true creates trouble with sleep.
You should try non-HWP SMBIOS such as MacBookPro11,1.

I don't know how to check if CPUPM is implemented or not.
If X86PlatformPlugin is loaded (in ioreg), then you have at least something right regarding CPU PM.

Please tell how to check. Also, one workaround I have found is that after waiting for 30 seconds(you have to make a guess for how much time it takes for your device to reach login screen) from moment the screen turns off, put your device to sleep using the sleep button combination and then waking it up(using mouse movement or pressing a keyboard key) gets it working. So, you can get it working in under 1 minute.
Have you found an ioreg from a real CoffeeLake Mac? It might help answer some questions.
 
Joined
Aug 7, 2018
Messages
114
Motherboard
Asus TUF FX504GE (Clover)
CPU
i7-8750H/HM370
Graphics
UHD 630, Nvidia 1050ti, 1920x1080
Mobile Phone
Android
If X86PlatformPlugin is loaded (in ioreg), then you have at least something right regarding CPU PM.
I am attaching PR files. ioreg is in it. Please check. I did see ACPI platform plugin there in IOPower section of ioreg. Is that the one or is it specifically named x86PlatformPlugin.

Have you found an ioreg from a real CoffeeLake Mac? It might help answer some questions.
Don't have access to any real Apple computer device.
 

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