I also have the quiet sound after the boot (but not too quiet).
About the noise you mentioned, I didn't hear that yet.
About the "Line Out Playback Volume" and "{Headphone,Speaker} Playback
Volume, without my patch, the Headphone and Speaker has its own
independent DAC, with my patch, they share one DAC, then the mixer name
is changed to "Line Out".
Could you generate 2 alsa-info.txt?
1) under the quiet sound condition, sudo echo 1 >
/sys/modules/snd_hda_codec/parameters/dump_coef; alsa-info.sh; then
upload the generated alsa-info.txt-quiet-headphone
2) after the sound change back to normal (quiet->not quiet), sudo echo 1
> /sys/modules/snd_hda_codec/parameters/dump_coef; alsa-info.sh; then
upload the generated alsa-info.txt-notquiet-headphone.
thanks.
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https://bugs.launchpad.net/bugs/1805079
Title:
click/pop noise in the headphone on several lenovo laptops
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