https://www.ultimateeditionoz.com/forum ... eats+Audio
After applying continue only if you are not satisfied. You may get some speaker popping as well as the loss of headphone support if you continue. Also consider that I am using a dv6t-7000.
Fist off we are going to be using a program called hda-jack-retask.
So to add that repository:
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sudo add-apt-repository ppa:diwic/hda
Then update the package cache and install the program:
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sudo apt-get update && sudo apt-get install hda-jack-retask
Now start the program:
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hda-jack-retask
'This is where it gets tricky. As this is for my laptop the following may need to be tweaked for other models.
Select the IDT 92HD91BXX codec (may be different on other models)
Check the "Show unconnected pins" box (the internal speakers do not show as connected)
Remap 0x0d (Internal Speaker, Front side) to "Internal speaker"
Remap 0x0f ("Not connected" but is the under-display speakers) to "Internal speaker" **On my system this breaks headphone support.**
Remap 0x10 ("Not connected" but is the subwoofer) to "Internal speaker (LFE)"
Apply now, then test with your favorite audio program (some may not work due to Pulse reset, so find one that does, verify sound is coming from all speakers).
If it works, select "Install boot override" to save the settings to apply at boot time.
Reboot. When it comes back, you should have full sound from all speakers. Also test headphones. Plugging in headphones should disable sound from all internal
speakers.
My sub-woofer is working great. I hope this helps someone.