Graphical Glitches on Haswell HD 4600? [Video Attached]

[V3-571G]

I am getting these graphical glitches around the dock area in Catalina, as seen in the video above. It happens most notably when logging in, and also in some third-party programs like Photoshop and Google Chrome:

MVI_2073

Watch "MVI_2073" on Streamable.

streamable.com

I have a i7-4720HQ with HD4600 mobile iGPU. In my OpenCore config.plist I have the following values. I have to use framebuffers because I cannot set DVMT manually in the BIOS:

DeviceProperties > Add > PciRoot(0x0)/Pci(0x2,0x0)

AAPL,ig-platform-id - 0600260A - (Data)
device-id - 12040000 - (Data)
framebuffer-patch-enable - 1 - (Number)
framebuffer-stolenmem - 00003001 - (Data)
framebuffer-fbmem - 00009000 - (Data)

CSM mode is enabled in my BIOS. Disabling it causes the entire screen to become garbled.

I have my SMBIOS set to MacBookPro11,2

Can anyone offer some suggestions?

 

[Feartech]

I am getting these graphical glitches around the dock area in Catalina, as seen in the video above. It happens most notably when logging in, and also in some third-party programs like Photoshop and Google Chrome:

MVI_2073

Watch "MVI_2073" on Streamable.

streamable.com

I have a i7-4720HQ with HD4600 mobile iGPU. In my OpenCore config.plist I have the following values. I have to use framebuffers because I cannot set DVMT manually in the BIOS:

DeviceProperties > Add > PciRoot(0x0)/Pci(0x2,0x0)

AAPL,ig-platform-id - 0600260A - (Data)
device-id - 12040000 - (Data)
framebuffer-patch-enable - 1 - (Number)
framebuffer-stolenmem - 00003001 - (Data)
framebuffer-fbmem - 00009000 - (Data)

CSM mode is enabled in my BIOS. Disabling it causes the entire screen to become garbled.

I have my SMBIOS set to MacBookPro11,2

Can anyone offer some suggestions?

MacBookPro11,1 may be better choice

 

[V3-571G]

MacBookPro11,1 may be better choice

Well first of all, thanks for the tip. I tried generating a new SMBIOS for MacBookPro11,1 but I still have the same problem with the graphical glitching. Is there anything else I can try?

 

[Feartech]

Well first of all, thanks for the tip. I tried generating a new SMBIOS for MacBookPro11,1 but I still have the same problem with the graphical glitching. Is there anything else I can try?

not sure as you haven't uploaded any files

are you using this config,plist?

OS-X-Clover-Laptop-Config/config_HD4600_4400_4200.plist at master · RehabMan/OS-X-Clover-Laptop-Config

Some Clover config.plist files for common Intel graphics configurations - RehabMan/OS-X-Clover-Laptop-Config

github.com

 

[V3-571G]

not sure as you haven't uploaded any files

are you using this config,plist?

OS-X-Clover-Laptop-Config/config_HD4600_4400_4200.plist at master · RehabMan/OS-X-Clover-Laptop-Config

Some Clover config.plist files for common Intel graphics configurations - RehabMan/OS-X-Clover-Laptop-Config

github.com

Thanks, I have seen that config previously. The problem is that the config is for Clover (not OpenCore) so I can't copy the entire thing and use it exactly as it is. I am using the same values that RehabMan has for AAPL,ig-platform-id and device-id under DeviceProperties > Add > PciRoot(0x0)/Pci(0x2,0x0) - But if I use the framebuffer-cursormem line like he has then it causes a kernel panic on boot, which is why I do not have it included.

I have attached my config underneath. Maybe you can suggest something.