<< Solved >> Big Sur UHD 630 working but No 4k/2k resolution

[prashantloveguru143]

Processor: i5 10400
Mobo: Asus B460M-A (r2)
Chipset: H470

i am successfully running catalina 10.15.6 (iMac19,1) . Everything works Flawlessly including sleep. 1440p resolution Works great in catalina with both HDMI and DVI ports . As i have qHD monitor Benq PD2700Q

Now i have installed Big Sur 11.2.1 with same EFI everything working but resolution is limited to 1080p with HDMI port. 1440p resolution Works only with DVI port. i used DVI to HDMI converter.
tried everything but no luck. i tired both SMBIOS (iMac19,1) and (iMac20,1) but same issue.
Plz Help.

 

[pastrychef]

Get rid of the stolenmem, unifiedmem, and fbmem stuff. There's absolutely no need for that stuff on desktops. Idk why so many people have them configured...

 

[prashantloveguru143]

re

Get rid of the stolenmem, unifiedmem, and fbmem stuff. There's absolutely no need for that stuff on desktops. Idk why so many people have them configured...

removed that but still no luck . just VRAM shifted from 2048MB to 1536MB.
still struggling to get qHD resolution.

 

[pastrychef]

re

removed that but still no luck . just VRAM shifted from 2048MB to 1536MB.
still struggling to get qHD resolution.

1536MB is what I always see. I've never had a need to try and increase that.

I don't know if spoofing device-id and platform-id are necessary on Comet Lake. I'd try removing that stuff too. You want everything as native as possible for best compatibility.

Btw, unless you have a specific need to disable SIP, I'd enable it on Bg Sur.

 

[prashantloveguru143]

pastrychef ,​

What abt my main issue resolution is limited to 1080p with HDMI port ?
any leads.

 

[pastrychef]

pastrychef ,​

What abt my main issue resolution is limited to 1080p with HDMI port ?
any leads.

Have you tried with the entire Device deleted from DeviceProperties?

 

[prashantloveguru143]

i deleted device from device properties ,
why hackintool still showing its cofee lake ??

 

[P1LGRIM]

why hackintool still showing its cofee lake ??

You should unlock it :

 

[prashantloveguru143]

You should unlock it :

ok and what to do next ?

 

[pastrychef]

i deleted device from device properties ,
why hackintool still showing its cofee lake ??

Are you getting more resolutions?

You don't need the GfxYTile either. Did you configure those connector types or did you just copy from somewhere else? Are they really needed?