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I am pretty new to using Raspberry and this may be a noob question. I figured out that to output audio through the headphone jack I need to change the setting using raspi-config. But whenever I reboot I need to change the configuration again to make it work. Is there any way of automatically configuring to output the audio through 3.5mm jack ? TIA.

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do the following

first remove pulseaudio if its installed and install alsa alsa-utils

When thats done do the following steps

snd_bcm2835
amixer cset numid=3 1
amixer cset numid=2 1

this ensures that you have the audio running over the headphone jacks and locks it

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    Removing parts of audio subsystem to pin the default output is like crushing a fly with a steam-roller. – Dmitry Grigoryev Feb 1 '17 at 15:52

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