you need to add in your Device Properties for your graphics in:
<key>DeviceProperties</key>
<dict>
<key>Add</key>
<dict/>
<key>Delete</key>
<dict/>
</dict>
and you need to remove -igfxvesa boot argument
ALCPlugFix is a good test to try, used it before on a laptop hack with no issues
then i created my own layout id which worked without the need of the above
this may help:
https://github.com/black-dragon74/ALCPlugFix-Swift
or there is also:
https://github.com/5T33Z0/AppleALC-Guides/tree/main/AppleALC_Layout-ID
also, what makes you think your trackpad will work any better?
make sure your kexts are listed in order in your config.plist properly ie:
<dict>
<key>Arch</key>
<string>Any</string>
<key>BundlePath</key>...
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