Re: [alsa-devel] No sound with Realtek ALC298 on a Samsung Galaxy book

Aurélien Croc
2020-02-17T14:04:21Z

> The BIOS seems broken, it just sets a single output pin.
> You need to try to figure out the pin connections, e.g. via
> hdajackretask program. The headphone might work with that.
> But the speaker output might need another special handling, and it's
> nothing but trial-and-test with the existing quirks for similar
> devices. Take a look at sound/pci/hda/patch_realtek.c.

Thank you for your answer. I tried hdajackretask but I didn't succeed to get
sound from headsets.. Maybe I didn't tried all the advanced features of this
tool..
I also tried some quirks from your file but it changes nothing. There are too
many possibilities. It seems to be hard to test them all.

Don't you know a solution to get what is bugged or to get information about
which channel is linked to headets or internal speakers from Windows drivers?
I think about a tool to sniff communication between the driver and the sound
card? or read information from the sound card under windows?
Reverse engineering the Windows driver would lead to the solution but will be
very long for me since I'm not familiar with the Intel HDA card and how this
Realtek chip internally works.
Don't hesitate if you have any hints which could help me (and all the other
users of this laptop..)
Cheers,

Aurélien

Le lundi 17 février 2020, 09:00:42 CET Takashi Iwai a écrit :
> On Sat, 15 Feb 2020 17:56:58 +0100,
>
> Aurélien Croc wrote:
> > Dear ALSA community,
> >
> > I just bought a Samsung Galaxy book 12" laptop and I installed the latest
> > Fedora version (31) on it. Unfortunately when I try to listen something
> > there is absolutely no sound from speaker nor headsets. I checked that
> > volumes of the different channels were max. I also checked for muting
> > system but I didn't found anything.
> > Of course it works perfectly under Windows.
> > I saw on internet that many ALC298 users had troubles with it. I tried
> > different options to the intel hda driver (especially the model one) but
> > it
> > changes nothing.
> >
> > Here is the alsa-info.sh output: http://alsa-project.org/db/?
> > f=871881e295972b9ecf252b25e90d659e38d939b8
> > I would appreciate some help in order to find a solution.
> > Tell me if you need more information.
> > Thanks in advance.
>
> The BIOS seems broken, it just sets a single output pin.
> You need to try to figure out the pin connections, e.g. via
> hdajackretask program. The headphone might work with that.
> But the speaker output might need another special handling, and it's
> nothing but trial-and-test with the existing quirks for similar
> devices. Take a look at sound/pci/hda/patch_realtek.c.
>
>
> Takashi

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