satt294

CPU: Intel(R) Core(TM) i7-7600U

iGPU: Intel UHD 620

RAM: 16GB

SMBIOS: MacbookPro 15,2  (Suggested on some portal for my Kabylake processor)

iGPU patches: please see the attached image. 

 

PS: I am trying to update my signature with my system specs, but I do not know how

 

Yes, that makes sense. Thanks for your explanation. I tried with 96MB DVMT, but I continue to have issues with HDMI. The TB3 -> DP works fine at 4K@60 and I couldn't ask for more.

When I connect the HDMI cable, the display still shows the default resolution as 2560x1440, though I can see the 4K resolution in the scaled resolution list. Once I select 4K from there, the external monitor goes black and does not come back, unless I reboot.

Thanks for your reply @Hervé. I followed your guide to set the DVMT through grub shell to 96Mb. But I am still not able to get 4K output via HDMI. Attached is the setup IFR text file extracted from setup.bin. I used 0x795 as the variable when running the setup_var command in grub shell.  setup IFR.txt.zip

Success!! Using my thunderbolt to DisplayPort cable. Now I have 4K@60Hz on my secondary monitor. In addition to setting the DVMT using the mod grub shell, I have to remove two patches: `framebuffer-fbmem` and `framebuffer-stolenmem` and add a new flag `framebuffer-flags` and set its value to 0x0b07e300. After restarting the system, I am able to see the default resolution for my monitor has changed to 3840x2160. Thanks a lot @Hervé

However, when using the HDMI cable, I seem to get 4K output, but the screen goes all `staticky` within couple of seconds. I will try again with a DVMT of 96Mb and let you know.

 

 

Reference (where I got to know that we have to remove the existing framebuffer-patches) : https://github.com/daliansky/XiaoMi-Pro-Hackintosh/wiki/Set-DVMT-to-64mb

I am trying to connect from the thunderbolt port to DisplayPort on my HP Envy 27s 4K monitor. On windows and Linux, I am able to get 4K resolution when extending the display. However on the Monterey 12.5 hack, I am able to get only 2560x1600 resolution. I am not able to use HDMI to connect to the monitor as the laptop monitor keeps blinking and does not seem to detect HDMI connected, whereas it works fine on Linux and Windows 10. Does anyone manage to resolve this issue?

Thanks for your help @Jake Lo. I changed the alcid=13 and reset NVRAM before trying again. The internal microphone is working now.

Thanks a lot.

 

Thanks @Hervé, but I got it working without trying your suggestion.

Hi @Jake Lo, I tried all these layout-ids using alcid=xx boot arg, but the internal mic didn't work for any of these ids. The audio out works every time. Should I retry with Device Properties --> PCI... --> layout-id? 

Hi @Jake Lo Thanks a lot for the OpenCore packs you posted here and here. I am able to successfully run Big Sur on my Dell Latitude 7480 (i7-7600U, HD620). The display, graphics acceleration, keyboard and trackpad are working along with Wifi, Bluetooth, Audio out. But the internal microphone is not working. I tried using a bluetooth headset and the mic is not working still. I searched and tried some fixes online, but nothing seems to help right now. 

To add some more details. I tried connecting my Jabra Headeset via USB port and both the speaker and the microphone are working fine. When I connect the same headset via Bluetooth only the speaker is working and the mic is not working.