Jump to content

[Solved] 7400 with HDMI output 720 res only ...no 1080p


Recommended Posts

Hi,

 

I have 7400 model with custom EFI built for 7400 and weirdly I can't establish fullhd res (1080p) on the external monitor, it is going blank. Is fine when 720 is set instead.


I've swapped DP connectors to HDMI in the framebuffer, have full accel. but 720 res is working only without problem unfortunately ...no 1080p.


Any advice on where to look? EFI folder with config, essential kexts and amls attached.

 

Thanks

EFI.zip

Link to post
Share on other sites

Sure thing.

 

Before I had both AAPL,ig-platform-id and device-id set to Iris 655 but with a mistake as below

 

image.png.f61245f8cb6f286ef2cfde0059a00585.png

 

This is incorrect. AAPL,ig-platform-id should be 0900A53E. Anyway, after fiddling with settings again I thought to use UHD 620 values this time.

 

image.png.d2464835cf128a990ba7ae439c958996.png

 

also, framebuffer-conX was not set correctly followed old settings below

 

image.png.a941653763401fb594bc825f703984a2.png

 

con1-alldata was set with 00080000, which is HDMI. Compared with others, I've decided to split alldata values and start counting conX from 1 instead of 0.

 

Correct settings are:

AAPL, ig-platform-id == 00009B3E

device-id == 9B3E0000

 

with framebuffer as:

image.png.3262f7de47fbabcb924015128def0b52.png

 

Everything functioning well afterwards. I did test it with SMBIOS for MBP15,4 and  MBP15,2. I do believe with AAPL, ig-platform-id: 0900A53E and device-id: A53E0000 should work as well, followed https://elitemacx86.com/threads/intel-uhd-graphics-620-whiskey-lake-on-laptop-clover-opencore.455 . So, in my case, framebuffer-conX key values were set incorrectly.

 

Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Restore formatting

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

Loading...
×
×
  • Create New...