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Old 07-11-2008, 12:00 PM
"Valent Turkovic"
 
Default kernel bug - sound clicks

Loud clicks from speakers (snd_intel_8x0):
https://bugzilla.redhat.com/show_bug.cgi?id=450395

Can somebody please look at this?

Cheers,
Valent.

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Old 07-11-2008, 12:22 PM
Josh Boyer
 
Default kernel bug - sound clicks

On Fri, 2008-07-11 at 14:00 +0200, Valent Turkovic wrote:
> Loud clicks from speakers (snd_intel_8x0):
> https://bugzilla.redhat.com/show_bug.cgi?id=450395
>
> Can somebody please look at this?

There are currently 363 kernel bugs open for F9. 271 of those were
submitted before yours.

josh

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Old 07-11-2008, 12:29 PM
"Valent Turkovic"
 
Default kernel bug - sound clicks

On Fri, Jul 11, 2008 at 2:22 PM, Josh Boyer <jwboyer@gmail.com> wrote:
> On Fri, 2008-07-11 at 14:00 +0200, Valent Turkovic wrote:
>> Loud clicks from speakers (snd_intel_8x0):
>> https://bugzilla.redhat.com/show_bug.cgi?id=450395
>>
>> Can somebody please look at this?
>
> There are currently 363 kernel bugs open for F9. 271 of those were
> submitted before yours.
>
> josh
>
> --
> fedora-devel-list mailing list
> fedora-devel-list@redhat.com
> https://www.redhat.com/mailman/listinfo/fedora-devel-list
>


Ok, thank you for your reply.

Valent.

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Old 07-11-2008, 12:40 PM
Richard Hughes
 
Default kernel bug - sound clicks

On Fri, 2008-07-11 at 14:00 +0200, Valent Turkovic wrote:
> Loud clicks from speakers (snd_intel_8x0):
> https://bugzilla.redhat.com/show_bug.cgi?id=450395
>
> Can somebody please look at this?

Have a look at
http://blogs.gnome.org/hughsie/2008/03/28/clicking-of-snd_hda_intel/

Richard.


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Old 07-11-2008, 05:35 PM
Hans de Goede
 
Default kernel bug - sound clicks

Richard Hughes wrote:

On Fri, 2008-07-11 at 14:00 +0200, Valent Turkovic wrote:

Loud clicks from speakers (snd_intel_8x0):
https://bugzilla.redhat.com/show_bug.cgi?id=450395

Can somebody please look at this?


Have a look at
http://blogs.gnome.org/hughsie/2008/03/28/clicking-of-snd_hda_intel/



Hmm,

We really should find a way to make this just work. How about adding a quirk
list for this to hal and make hal set the powerdown timeout to like 5 minutes
on affected laptops? So that people who don't have desktop sound effects
enabled get the power managament advantages when not using sound, and those 2
do don't get the constant plopping (assuming they will do something causing set
desktop sound effects atleast once every 5 minutes).


Regards,

Hans

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Old 07-11-2008, 08:59 PM
Peter Jones
 
Default kernel bug - sound clicks

Hans de Goede wrote:

Richard Hughes wrote:

On Fri, 2008-07-11 at 14:00 +0200, Valent Turkovic wrote:

Loud clicks from speakers (snd_intel_8x0):
https://bugzilla.redhat.com/show_bug.cgi?id=450395

Can somebody please look at this?


Have a look at
http://blogs.gnome.org/hughsie/2008/03/28/clicking-of-snd_hda_intel/



Hmm,

We really should find a way to make this just work. How about adding a
quirk list for this to hal and make hal set the powerdown timeout to
like 5 minutes on affected laptops?


Why not just make the driver lower the volume when you're not playing
any sound? (I suspect that will also cause it to take very slightly
less power, as well...) How long does it really take the hardware to
adjust it back to the setting we're displaying to the user in the event
of a noise?


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Old 07-14-2008, 07:51 AM
"Valent Turkovic"
 
Default kernel bug - sound clicks

On Fri, Jul 11, 2008 at 2:40 PM, Richard Hughes <hughsient@gmail.com> wrote:
> On Fri, 2008-07-11 at 14:00 +0200, Valent Turkovic wrote:
>> Loud clicks from speakers (snd_intel_8x0):
>> https://bugzilla.redhat.com/show_bug.cgi?id=450395
>>
>> Can somebody please look at this?
>
> Have a look at
> http://blogs.gnome.org/hughsie/2008/03/28/clicking-of-snd_hda_intel/
>
> Richard.
>
>
> --
> fedora-devel-list mailing list
> fedora-devel-list@redhat.com
> https://www.redhat.com/mailman/listinfo/fedora-devel-list
>


So as per your blog post this is bug over a year old. Is my bug a
duplicate of it in bugzilla? If so please post the link.

Is there something that we users who aren't developers can do so that
this bug gets fixed faster? Is there some log, some debug output that
would help kernel developers to find how to deal with these sound
chips?

Cheers,
Valent.

--
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linux, blog, anime, spirituality, windsurf, wireless
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Old 07-14-2008, 12:37 PM
Richard Hughes
 
Default kernel bug - sound clicks

On Mon, 2008-07-14 at 09:51 +0200, Valent Turkovic wrote:
> So as per your blog post this is bug over a year old. Is my bug a
> duplicate of it in bugzilla? If so please post the link.

In fedora bugzilla I've not checked -- but there's a few in the kernel
bugzilla and the alsa bugtracker.

> Is there something that we users who aren't developers can do so that
> this bug gets fixed faster? Is there some log, some debug output that
> would help kernel developers to find how to deal with these sound
> chips?

Well, to be honest, I'm not sure how to go forward. Using WindowsXP, you
don't get the sounds clicks, so either the windows driver has worked out
a way of powering up the soundcard without a DC click, or the windows
driver just doesn't power down the soundcard. You can be sure there's
some vendor whitelist/blacklist trickery going on.

We also think this is probably a per-laptop thing, rather than a
per-chipset thing, so a kernel blacklist would be pretty hard to
populate. The alsa docs explain things a bit better:

"""
With the automatic power-saving, the driver turns off the codec power
appropriately when no operation is required. When no applications use
the device and/or no analog loopback is set, the power disablement is
done fully or partially. It'll save a certain power consumption, thus
good for laptops (even for desktops).

The time-out for automatic power-off can be specified via power_save
module option of snd-ac97-codec and snd-hda-intel modules. Specify
the time-out value in seconds. 0 means to disable the automatic
power-saving. The default value of timeout is given via
CONFIG_SND_AC97_POWER_SAVE_DEFAULT and
CONFIG_SND_HDA_POWER_SAVE_DEFAULT Kconfig options. Setting this to 1
(the minimum value) isn't recommended because many applications try to
reopen the device frequently. 10 would be a good choice for normal
operations.

The power_save option is exported as writable. This means you can
adjust the value via sysfs on the fly. For example, to turn on the
automatic power-save mode with 10 seconds, write to
/sys/modules/snd_ac97_codec/parameters/power_save (usually as root):

# echo 10 > /sys/modules/snd_ac97_codec/parameters/power_save

Note that you might hear click noise/pop when changing the power
state. Also, it often takes certain time to wake up from the
power-down to the active state. These are often hardly to fix, so
don't report extra bug reports unless you have a fix patch ;-)

For HD-audio interface, there is another module option,
power_save_controller. This enables/disables the power-save mode of
the controller side. Setting this on may reduce a bit more power
consumption, but might result in longer wake-up time and click noise.
Try to turn it off when you experience such a thing too often.
"""

Richard.


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