Comment 12 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). Is it possible that "line out" is treated differently from "headphone" by the hardware, or is it just a name?

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.

I put my kernel config and alsactl store output under http://www.vygo.net/hda/ but I don't know if it aids debugging in any way. Do you think it may help if I try your kernel config?

Thank you for your efforts and, if appropriate, merry Christmas.