On Fri, 14 Apr 2017 12:27:37 +0200, Laszlo Papp wrote:
On Fri, Apr 14, 2017 at 11:20 AM, Takashi Iwai tiwai@suse.de wrote:
On Fri, 14 Apr 2017 12:13:32 +0200, Laszlo Papp wrote:
On Fri, Apr 14, 2017 at 8:40 AM, Takashi Iwai tiwai@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.
cat /sys/module/snd_hda_intel/parameters/power_save 0
Back to my previous question: is there a way to permanently tell the node to remain up? As mentioned, some use before the hardware breaks is better than no use. I will not switch to Windows by any means as I really like Linux much better. I would rather buy a new laptop than switching to Windows. But before doing that, I would like to see what can be worked out with the current setup.
As I mentioned, it's possibly the BIOS firmware who does it, no the Linux kernel driver. You can watch the driver behavior via tracepoint outputs (see Documentation/sound/hd-audio/notes.rtf). If it shows the widget power down, it's the driver issue. If it still happens even though the kernel doesn't touch, it's a hardware firmware problem.
Takashi
Yes, I agree with you that something has triggered this issue over time. However, all I can say is that Windows has no such problems if I boot my laptop up with Windows 7. The OS can play sounds without any problems. So, I am not yet convinced whether we are in a position to blame the hardware at this point. I would love to see some evidence if that is the case
It is needless to say, but I am happy to send any further outputs requested, etc.
Thank you for your help so far.
Takashi
Ys, L.
Takashi
On Mon, Mar 27, 2017 at 8:29 AM, Laszlo Papp lpapp@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@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. > >
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