Unable to get a 2k resolution with Big Sur

[dpnptl]

After spending a few hours I am able to install Big Sur over my existing Catalina os using Open core. The only thing missing is display resolution. With Catalina 4k monitor was working fine but unable to get a 2k resolution with Big Sur. Have tried all patches and open core guidelines but no luck. I am attaching the config file.

Device specification
Model: iMac15,1
MB: Gigabyte z97-d3h
Processor: Core i7 4790k
GPU: Intel HD 4600
Connectivity using HDMI (Please note it was working fine with Catalina installation).

 

[dariu]

Try like this

 

[dpnptl]

Yes, that worked, Thanks! I tried to set framebuffer but it didn't work, not sure why perhaps was changing lots of things. Thanks a lot!