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princerock

E7440 popping sound when powering off

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E7440 fresh El Capitan install following Jake's guide:

 

 

I found when restarting or shutting down, the speaker makes a loud popping sound. It's like when you turn off the preamp before turning off the speaker, and the speaker makes that pop noise. I searched online and tried the antipop app, but it didn't work. Is there anyway to fix this issue?

 

Thanks,

 

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Like a very brief "Shrreeeeeek"? My E6440 does that too on restart, right when the system shuts down. Nothing you can do about it afaik.

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That's bad news. The popping sound could be really loud and I even worried it could break the internal speaker. If I connect the HDMI cable, both the monitor (which has built-in speaker) and the laptop make this noise upon restarting or powering off. It seems it always shuts down the audio source before shutting down the speaker, which seems to be a bad design.

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Yes, remove it from /L/E

Disable the AppleHDA kext to patches in Config

Change layout-id to 12, 18, or 28

Add the AppleALC and Lilu to Clover kext

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I didn't try this solution directly but I did update to High Sierra (10.13.6). It looks like the bootpack has this method (layout id = 12) and this problem is gone. Thank you Jake!

 

EDIT - sorry I spoke too fast. I still heard the sound after the most recent reboot. So it seems it's not happening every time but the problem is still there. Guess I will need to try out other layout ids?

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