[alsa-devel] Internal Speaker problem

[Takashi Iwai]

On Fri, 14 Apr 2017 12:13:32 +0200,
Laszlo Papp wrote:
> 
> On Fri, Apr 14, 2017 at 8:40 AM, Takashi Iwai <tiwai at suse.de> wrote:
> 
> > On Fri, 14 Apr 2017 08:44:46 +0200,
> > Laszlo Papp wrote:
> > >
> > > Guys, seriously, no one willing to help with a completely broken setup?!
> > >
> > > It works fine on Windows, so I would really like to get it working on
> > > Linux, too.
> >
> > Well, if it used to work, it's basically a regression, and at best,
> > try to downgrade kernel or whatever to identify at which point it
> > started regression.  It'd be a great help alone to analyze what went
> > wrong.
> >
> 
> 
> I do not think this is a regression. I have just double checked this with a
> live USB using Ubuntu 16.04 LTS. The same problem happens. The sound goes
> off within a couple of seconds.
> 
> sudo hda-verb /dev/snd/hwC0D0 0x1f SET_POWER_STATE 0
> 
> would bring the node back for less a minute, but that is also not
> acceptable.
> 
> So, basically, I would like it to work the same way it does on Windows if
> possible. Windows does not switch it off. It could be because they utilise
> the internal chip better and for other reasons, etc. At the end of the day,
> I would be even happier to persistently tell the node to stay up, no matter
> what. It may damage the internal speaker, but it is still better that I can
> use it for a while than I cannot use it for any amount of time at all. So,
> is there a way to achieve that bruteforce approach?
> 
> The nicer solution would surely be to figure out why Windows can cope with
> the same hardware. I do not think Windows would break the hardware.

Check whether power_save is set or not in snd-hda-intel option, see
/sys/module/snd_hda_intel/parameters/power_save.  If disabling the
power-save prevents the issue happening, the cause is the power-save
feature.

If the problem still happens even if you disable the power-save mode
in the driver, it's possibly a hardware-specific problem.  Some Lenovo
laptops have a known firmware issues that turn off the codec power.
I'm not sure whether it's the case.


Takashi

> 
> Ys, L.
> 
> 
> > Takashi
> >
> > >
> > > On Mon, Mar 27, 2017 at 8:29 AM, Laszlo Papp <lpapp at kde.org> wrote:
> > >
> > > > I am sorry about flooding with my emails. I just thought that I would
> > > > amend some information that I forgot to mention in my original email.
> > > >
> > > > The same laptop and internal speaker work ok on Windows 10. Also, the
> > > > setup used to work about 1-2 months ago. I cannot remember what exactly
> > > > broke, perhaps a system upgrade. If it matters, I am using Archlinux.
> > > >
> > > > On Mon, Mar 27, 2017 at 8:27 AM, Laszlo Papp <lpapp at kde.org> wrote:
> > > >
> > > >> Dear Alsa Developers,
> > > >>
> > > >> My internal speaker in the Lenovo Thinkpad T510 laptop stopped
> > working.
> > > >> Normally, it would provide either no sound or just for a couple of
> > seconds
> > > >> and then it would go off.
> > > >>
> > > >> I do not have auto-mute enabled. I checked it with alsamixer that it
> > is
> > > >> disabled.
> > > >>
> > > >> My ALSA information is located at http://www.alsa-project.org/db
> > > >> /?f=87547de5ff55e44e360aa2382d4e5d3b7bbed091
> > > >>
> > > >> Do you know how I could fix this?
> > > >>
> > > >> Ys, L.
> > > >>
> > > >>
> > > >
> > > _______________________________________________
> > > Alsa-devel mailing list
> > > Alsa-devel at alsa-project.org
> > > http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
> > >
> >