Help with HDMI out on Ventura

[SavageAUS]

Ok so I’ve started a new job and need to use dual screens with my laptop. I’ve been using Winblows until now but can’t do it anymore. Need my macOS back. 
I have confirmed my HDMI is connected to my iGPU. I am just unsure how to get at minimum display output working. HDMI audio does not matter for the time being. 
I will upload my config and ioreg very soon, anything else that’s needed please let me know but I really need to get this going today. 

Have attached ioreg and config.

With this basic config when i plug in HDMI my laptop screen goes black then comes back after a second or two like it is detecting the connection.

Archive.zip

Edited August 14, 2022 by SavageAUS

[SavageAUS]

I just read that multi monitor setups need boot arg agdpmod=vit9696?

Is this correct for laptops?

Edited August 14, 2022 by SavageAUS

[Lorys89]

Il 14/8/2022 at 08:19, SavageAUS ha scritto:

I just read that multi monitor setups need boot arg agdpmod=vit9696?

Is this correct for laptops?

try this 

[SavageAUS]

To follow up up my HDMI out issues I now have HDMI display out but the only way it works is to hot plug the monitor once in macOS and the same after sleep. 

[Lorys89]

9 minuti fa, SavageAUS ha scritto:

To follow up up my HDMI out issues I now have HDMI display out but the only way it works is to hot plug the monitor once in macOS and the same after sleep. 

With the patch posted by me above? 

 

[SavageAUS]

Unfortunately no, I ended up changing smbios to MacBookPro15,1 from 16,4 which helped then went through busids and now it works.

I have tried the force online boot arg but that causes a reboot before I reach the desktop.