<< Solved >> AppleALC not working on Big Sur 11.6.8

[norwayRainyday]

Hi
I was on Mojave-Clover for couple years and almost everything worked fine. This is my first try to install BigSur (opencore) and I think the installation process using OC was unexpectedly fine and smooth.

But I can't get the audio working. I followed the official opencore guide and Lilu/AppleALC/AppleHDA are all loaded and I've tried every layout-ids but still no audio. On Mojave (clover) it perfectly works with layout=3 (ALC233).

Could you please help me find out what's wrong? Thank you.

 

[Feartech]

Hi
I was on Mojave-Clever for couple years and almost everything worked fine. This is my first try to install BigSur (opencore) and I think the installation process using OC was unexpectedly fine and smooth.

But I can't get the audio working. I followed the official opencore guide and Lilu/AppleALC/AppleHDA are all loaded and I've tried every layout-ids but still no audio. On Mojave (clover) it perfectly works with layout=3 (ALC233).

Could you please help me find out what's wrong? Thank you.

remove the # from:

<key>Add</key>
        <dict>
            <key>#PciRoot(0x0)/Pci(0x1b,0x0)</key>
            <dict>
                <key>layout-id</key>
                <integer>3</integer>
            </dict>

and also the boot argument: alcid=3

 

[norwayRainyday]

remove the # from:

<key>Add</key>
        <dict>
            <key>#PciRoot(0x0)/Pci(0x1b,0x0)</key>
            <dict>
                <key>layout-id</key>
                <integer>3</integer>
            </dict>

and also the boot argument: alcid=3

Hi I removed the # and changed the boot args and restarted.
There wasn't too much log this time but unfortunately it still not working (I used # to comment that part temporarily based on one of your answers)

 

[Feartech]

Hi I removed the # and changed the boot args and restarted.
There wasn't too much log this time but unfortunately it still not working (I used # to comment that part temporarily based on one of your answers)

remove boot argument: alcid=3

also try each of these:
4, 5, 13, 21, 27, 28, 29, 32, 33

and don't forget to reset nvram on each try

also some have had better results by using a previous version of AppleALC.kext

also as you have generated your own HPET.aml, you also need to add in the config.plist renames to fix IRQ:

GitHub - corpnewt/SSDTTime: SSDT/DSDT hotpatch attempts.

SSDT/DSDT hotpatch attempts. Contribute to corpnewt/SSDTTime development by creating an account on GitHub.

github.com

 

[norwayRainyday]

remove boot argument: alcid=3

also try each of these:
4, 5, 13, 21, 27, 28, 29, 32, 33

and don't forget to reset nvram on each try

also some have had better results by using a previous version of AppleALC.kext

also as you have generated your own HPET.aml, you also need to add in the config.plist renames to fix IRQ:

GitHub - corpnewt/SSDTTime: SSDT/DSDT hotpatch attempts.

SSDT/DSDT hotpatch attempts. Contribute to corpnewt/SSDTTime development by creating an account on GitHub.

github.com

"you also need to add in the config.plist renames to fix IRQ"

This one did the job perfectly! Thanks a lot @Feartech, very helpful as always.

 

[Feartech]

This one did the job perfectly! Thanks a lot @Feartech, very helpful as always.

nice! glad you got it working!

so, it looks like the renames are crucial in your config,plist if you use HPET.aml (I'll keep that in mind!)

 

[norwayRainyday]

nice! glad you got it working!

so, it looks like the renames are crucial in your config,plist if you use HPET.aml (I'll keep that in mind!)

Thank you.
Nice takeaway at least for people reading this thread later.
Last night I tried almost every possible scenarios one after another. It was so frustrating.
I wish I asked it earlier, my eyes still hurt lol

 

[Feartech]

Thank you.
Nice takeaway at least for people reading this thread later.
Last night I tried almost every possible scenarios one after another. It was so frustrating.
I wish I asked it sooner, my eyes still hurt lol

I reckon that if you had disabled the HPET.aml it may have worked

 

[norwayRainyday]

I reckon that if you had disabled the HPET.aml it may have worked

Good point but I think I've already tried without HPET.aml with no success!