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I followed below link: https://www.tonymacx86.com/threads/guide-hp-elitebook-820-g3-hp-ultraslim-dock-hidpi-mojave-10-14-5.280093/ and internal speaker finally worked! All post installation process is same as what I did before. The most possible reason is the BIOS setting, and the driver64UEFI...

is it this? : https://github.com/acidanthera/AppleALC/wiki/Adding-codec-support

I'm a newbie on this, not sure if this's the link you're refering: https://github.com/RehabMan/HP-ProBook-4x30s-DSDT-Patch/tree/archive/Resources_ProBook my model is CX20724, not sure: 1.which plist I should use (layout5 or layout7 ?) 2.how to "importing the XML"

I'd say yes, the jack works at least. anything I can do to make the internal speaker work ?

I might misunderstand your meaning when generating previous report: debug_disable_FakePCIID_0.zip keeps layout-id=13 debug_ID3.zip keeps disable_FakePCIID=1 now I combine them (disable_FakePCIID=0 & layout-id=3), as attached. when headphone plugged in, it won't appear as the output option in...

Clear, thanks. when setting disable_FakePCIID to 0, and layout-id to 3, I got attached debug report.

nothing but internal mic works under High Sierra Nothing happen neither internal speaker nor jack work. BTW, I find someone with the same model shared his CLOVER data. there's a section in his SSDT , which doesn't exist in mine, not sure why there is such difference, I've tried to add below...

everything works under windows. under Mojave, the internal speaker doesn't work, but headphone connected to right jack works, internal mic also works. @RehabMan could you pls. have a look at the debug report. where could be the point. thanks a lot!

Clear! thanks for kind reminding!

Thanks, I assume "kextcache -i /" is the correct way for 10.13/10.14 ?

after running gen_debug, backlight works! not sure what happened, maybe the way it calls rebuilding cache. thanks!

Thanks for reminding, here's the output

Follow Rehabman's guide: https://www.tonymacx86.com/threads/guide-hp-probook-elitebook-zbook-using-clover-uefi-hotpatch.261719/ but can't adjust screen backlight: hot key doesn't work, can't see slide bar in displays setting @RehabMan, could u kindly have a look at this?

thanks, and I'll try.

not really, I've tested in windows.

thanks RehabMan I'm trying to follow your suggestion: 1.Remove CsmVideoDxe-64.efi 2.Change layout ID from 7 to 5 in SSDT-8x0-G3-Skylake.aml but still the same issue, any other thing I can do ? BTW, the internal MIC can work as always

can see "Build in output" in sound setting, and when pressing F9/F10, can see a working volume bar. but no sound. and when plug a headphone into the jack, no "Headphone" in the sound setting. any help would be appreciated！

@antonio765, does it mean you have a working VGA port with HD520?

Could you pls. share your EDID part in clover's config.plist? thx

not sure if you're referring the EDID file.