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From: David Henningsson <david.henningsson@canonical.com>
To: Raymond Yau <superquad.vortex2@gmail.com>
Cc: tiwai@suse.de, alsa-devel@alsa-project.org, zonque@gmail.com
Subject: Re: [PATCH] ALSA: usb - Don't create "Speaker" mixer controls on headphones and headsets
Date: Mon, 26 Nov 2012 16:26:02 +0100	[thread overview]
Message-ID: <50B38A0A.2010505@canonical.com> (raw)
In-Reply-To: <CAN8cciboDbGx6Ua6d25vsM=85EiuvN+ZEruNYNCmx+byTrgnvQ@mail.gmail.com>

On 11/26/2012 04:21 PM, Raymond Yau wrote:
>
> 2012-11-23 下午8:49 於 "David Henningsson"
> <david.henningsson@canonical.com
> <mailto:david.henningsson@canonical.com>> 寫道：
>  >
>  > A lot of headsets/headphones have a "Speaker" mixer control. This
> confuses
>  > PulseAudio to think it is a speaker instead of a headphone/headset.
>  > Therfore, we rename it to "Headphone".
>  >
>  > We determine if something is a headphone similar to how udev determines
>  > form factor (see 78-sound-card.rules).
>
> does it really fix the problem

It fixes a problem with a common class of Logitech stereo headsets.

> since there are
>
> 1) usb headsets which has "PCM" volume control
> 2) some usb headphone support 5.1

These devices are unlikely to be affected by the patch. If you have a 
problem with any of these devices, it's a different bug.


-- 
David Henningsson, Canonical Ltd.
https://launchpad.net/~diwic
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      reply	other threads:[~2012-11-26 15:26 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2012-11-23 12:48 [PATCH] ALSA: usb - Don't create "Speaker" mixer controls on headphones and headsets David Henningsson
2012-11-26  9:38 ` Takashi Iwai
2012-11-26 10:06   ` Clemens Ladisch
2012-11-29 13:00     ` Takashi Iwai
2012-11-26 15:21 ` Raymond Yau
2012-11-26 15:26   ` David Henningsson [this message]

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