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[FIX] Coffee Lake Intel UHD Graphics 630 on macOS Mojave: Kernel panic due to divide-by-zero

Hello, on my dell lns7590 I found that "division-by-zero" caused the kernel to crash. The division-by-zero "WhateverGreen driver does not seem to solve this problem.
This is my problem report
Code:
panic(cpu 2 caller 0xffffff80042652fa): Kernel trap at 0xffffff7f8796816c, type 0=divide error, registers:
CR0: 0x0000000080010033, CR2: 0x00007fff8f2b3d48, CR3: 0x0000000856678022, CR4: 0x00000000003626e0
RAX: 0x017d68fdc0000000, RBX: 0x017d68fdc0000000, RCX: 0x0100000100000000, RDX: 0x0000000000000000
RSP: 0xffffff83b4213330, RBP: 0xffffff83b4213360, RSI: 0xffffff83b4213158, RDI: 0xffffff837d42a000
R8: 0x00000010ea7007f7, R9: 0xffffff837d435ca8, R10: 0x0000000000000000, R11: 0x0000000000000000
R12: 0x000000001fc8bfd0, R13: 0x0000000000000000, R14: 0xffffff83b4213380, R15: 0x0000000009a7ec80
RFL: 0x0000000000010246, RIP: 0xffffff7f8796816c, CS: 0x0000000000000008, SS: 0x0000000000000010
Fault CR2: 0x00007fff8f2b3d48, Error code: 0x0000000000000000, Fault CPU: 0x2, PL: 0, VF: 0

Backtrace (CPU 2), Frame : Return Address
0xffffff83b4212d90 : 0xffffff800413bb2b
0xffffff83b4212de0 : 0xffffff80042734d5
0xffffff83b4212e20 : 0xffffff8004264f4e
0xffffff83b4212e70 : 0xffffff80040e2a40
0xffffff83b4212e90 : 0xffffff800413b217
0xffffff83b4212f90 : 0xffffff800413b5fb
0xffffff83b4212fe0 : 0xffffff80048d2aa9
0xffffff83b4213050 : 0xffffff80042652fa
0xffffff83b42131d0 : 0xffffff8004264ff8
0xffffff83b4213220 : 0xffffff80040e2a40
0xffffff83b4213240 : 0xffffff7f8796816c
0xffffff83b4213360 : 0xffffff7f87965c6e
0xffffff83b42137e0 : 0xffffff7f8793bcff
0xffffff83b42139a0 : 0xffffff7f877fed33
0xffffff83b4213a30 : 0xffffff7f877feb90
0xffffff83b4213ac0 : 0xffffff800486739b
0xffffff83b4213b10 : 0xffffff7f87805256
0xffffff83b4213b60 : 0xffffff8004870443
0xffffff83b4213ca0 : 0xffffff8004222d12
0xffffff83b4213db0 : 0xffffff80041419d8
0xffffff83b4213e10 : 0xffffff8004118635
0xffffff83b4213e70 : 0xffffff800412f0e5
0xffffff83b4213f00 : 0xffffff800424b575
0xffffff83b4213fa0 : 0xffffff80040e3226
Kernel Extensions in backtrace:
com.apple.iokit.IOGraphicsFamily(569.4)[1F9B5D88-52DB-3A16-8373-4F608A3CB2D8]@0xffffff7f877e2000->0xffffff7f87832fff
dependency: com.apple.iokit.IOPCIFamily(2.9)[ADD485B5-3EF8-37C4-B3C5-F86326E497A4]@0xffffff7f84cf8000
com.apple.driver.AppleIntelCFLGraphicsFramebuffer(14.0.4)[A30AC04F-FB51-328A-8942-A2BE0CEB5C3D]@0xffffff7f8791f000->0xffffff7f87b4cfff
dependency: com.apple.iokit.IOPCIFamily(2.9)[ADD485B5-3EF8-37C4-B3C5-F86326E497A4]@0xffffff7f84cf8000
dependency: com.apple.iokit.IOACPIFamily(1.4)[3D78401B-5D2D-33BC-9E41-DD2164EA874D]@0xffffff7f84ce6000
dependency: com.apple.iokit.IOAcceleratorFamily2(438.3.1)[66992525-3204-3CB0-8F03-4B70031B1CF2]@0xffffff7f87852000
dependency: com.apple.iokit.IOReportFamily(47)[988360A2-2E10-3014-A119-BE81BC045A10]@0xffffff7f84c28000
dependency: com.apple.AppleGraphicsDeviceControl(4.7.2)[2F63196D-03C6-3E49-BE5D-574F4AADED1A]@0xffffff7f87915000
dependency: com.apple.iokit.IOGraphicsFamily(569.4)[1F9B5D88-52DB-3A16-8373-4F608A3CB2D8]@0xffffff7f877e2000
As well as EFI and issuesissuehttps://github.com/tctien342/Dell-Inspiron-7591-Hackintosh/releases/tag/opencore-v3
 
You'll need to use Clover and use the correct dpcd-max-link-rate values in Clover/Devices/Properties within your iGPU. I tried this with OpenCore recently but could never get it to work correctly. There may be different values or a process for OpenCore.

 
thank you for this boot flag working well for my laptop as well. But I have some issue with Wakeup. It goes black screen from wakeup. I can still control backlight and audio that means my wake function is working but only screen is not showing up. Do you guys have any issue like this?
Hello, did you fix this issue? I had the same, randomly all ok, randomly black screen. Thank you!
 
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