Comment 34 for bug 1805079

Hui Wang,

Apologies for the slow reply.

Do you mean that you also have quiet sound after the boot?

Today I upgraded to 4.19.12, and the results seem the same. I'm running Funtoo Linux with "gentoo-sources" kernel, HDA and the Realtek codec as modules and plain ALSA with no daemons. I tried to compile them into the main kernel image, but the results were the same, except that the LEDs didn't work.

Here are sone more details:

The noise level I hear does not change with the playback volume. It's stronger when I play something (e.g., with mplayer) or touch the touchpad.

Without the 0x12 line, alsamixer shows heasphone and speaker controls at 100%, and "alsactl store" has {Headphone,Speaker} Playback {Volume,Switch}. Under the standard kernel (with your patch), the aforementioned controls in alsamixer show up as "00" in a box, and alsactl has only "Line Out Playback Volume" (and the two Switches).

With the standard kernel, the output of "alsactl store" is identical whether the sound is in the "too quiet" state or in the "noisy headphone" state.

Sometimes after I warm-reboot from a standard kernel to a kernel without the 0x12 line, I hear clicks when muting and unmuting the output, or noise, but they disappear after I play something (e.g., with mplayer).