Thanks for this crisp guide.
My laptop details
Dell Latitude E5280
Kabylake, i5-7200U, HD 620
Audio Codec ALC225
macOS: 10.14.5
My results wIth AppleALC kext:
I am able to get audio with AppleALC kext and native AppleHDA kext with config.plist layout set to 33. Headphones don't work. They work with ACPIPlugFix, but headphone distortion starts after waking from sleep.
I am interested in using the AppleHDA patch to see if I can do better.
Result with Mirone AppleHDA Patch v1.9:
With fullpatched AppleHDA, the speaker icon is greyed out and Sound Output and Input have no devices. USB Audio device works even without the patching, and continues to work with the patch. My DSDT is patched only for IRQ. In config.plist ACPI / HDAS renaming is done to HDEF and Device / Audio Layout =2.
I have done everything as per the guide, including trying out aDummy in SLE, HDAEnabler in SLE (or HDEF+IRQ patch in DSDT)
All the problem reporting files are attached. Please help me to make the AppleHDA Audio patch work properly with all devices including headphone.