Comment 185 for bug 1850439

Hi.

## Problem, check symptoms

We have a laptop here affected by the problem.

Following comment #172 https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1850439/comments/172

> and please do not forget to also let us know what model laptop you have.

* lshw says "ZenBook UX534FAC_UX533FAC" or simply "UX534FAC".
* Vendor identified it as UX534FA-A8094T.

> If possible please check all 4 of:
>
> 1. Speakers
> 2. Headphones output
> 3. Internal mic.
> 4. Headset mic. (using a phone headset with builtin mic with a single T-R-R-S connector)

Symptoms:

1. Speakers: no sound
2. Headphones output: no sound
3. Internal mic: works
4. Headset mic (no tested)

## Check workaround: success

> After testing please report back here what works (and what does not work) after issueing the 4 above commands;

> hda-verb /dev/snd/hwC0D0 0x20 0x500 0xf
> hda-verb /dev/snd/hwC0D0 0x20 0x400 0x7774

Issuing the first two above allowed to get sound output.

> hda-verb /dev/snd/hwC0D0 0x20 0x500 0x45
> hda-verb /dev/snd/hwC0D0 0x20 0x400 0x5289

Issuing the last two (right above) did not seem to have any effect.

Full test after the four commands:

1. Speakers: "perfect" sound
2. Headphones output: "perfect" sound
3. Internal mic: works
4. Headset mic: works

## Sound quality: as good as you can get

No artifacts like reported in #133.

"Perfect" means as good as can be given the physical speakers (e.g. not much bass but this is normal).

## Next step: have a permanent fix

Some copy-paste instructions as to how to make this fix permanent would be appreciated. Else I can figure out some and share, e.g. from https://askubuntu.com/questions/919054/how-do-i-run-a-single-command-at-startup-using-systemd

## Thanks

Thanks everyone, including @j-w-r-degoede who shows that kernel developers are taking care.