I cross-flashed the BIOS on a different motherboard because it had higher performance settings.
Luckily everything works fine (except audio).
I found out that the (SiliconPolicyPeiPostMem) module controls the sound.
Below are some tests I did.
Test 1: Change hardware ID to stock EC106902.
As a result the Realtek controller was successfully recognized and now I am able to slide the volume slider. Unfortunately the sub device output speakers are still missing.
Test 2: Replace the stock SiliconPolicyPeiPostMem module. As a result, the sound is there, but it seems that there are devices competing for the jack. Sometimes it is normal, sometimes it is disconnected, connected, disconnected, connected, so the sound is intermittent.
Now I don’t know how to proceed, thanks for any help possible.
Stock_SiliconPolicyPeiPostMem.zip (27.0 KB)
Change-SiliconPolicyPeiPostMem.zip (27.1 KB)
The above files are: Inventory/need to be modified.
please upload two full bios file