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This appears to have the right method. I added "alcverbs=1" to boot args and used alcid=77, this brought me closer to make the audio fully working. Based on comment I learnt from another forum, issuing "alc-verb 0x19 0x707 0x20" successfully made the headphone port working. All I need to do is make ALCFPluFix doing the same automatically on Connect/Wake events (may be more), but I am not sure how to convert "0x19 0x707 0x20" to equivalent format for ALCPlugFIx. The author provided no details. May be someone here can help. Update (2/23): I got it working. All I needed to do was to modify the "param" value to "0x20", and set "On Connect" & "On Wake" to TRUE. The verb command "SET_PIN_WIDGET_CONTROL" is actually "0x707" in hex. I've attached my modified sample.plist bellow. Just follow the install instruction. During the install, it would complain that "ALCPlugFix" is from Unknown source, just ignore it. After install, I went to install directory (/usr/local/bin), and run it once manually, by granting the needed permission. ALC295-DELL7400.plist.zip