On 10/25/2012 12:32 PM, John Frankish wrote: > -----Original Message----- > From: John Frankish > Sent: Monday, 22 October, 2012 11:38 > To: General PulseAudio Discussion > Cc: 'David Henningsson' > Subject: RE: [pulseaudio-discuss] Linking Channels Block Mono Microphone > >>> On 10/22/2012 08:50 AM, John Frankish wrote: >>> Using pulseaudio-2.1 with a dell latitude e6220 and the internal mono microphone: >>> >>> The pavucontrol "configuration" tab correctly shows the internal microphone as mono. >>> >>> The pavucontrol "input" tab incorrectly assumes the internal >>> microphone is stereo and any input is blocked until the "link channels" icon is clicked in order to unlink the channels. >>> >>> From google I can see that several people have seen the same problem, but I don't see a solution/bug fix anywhere. >>> >>> Is there some way to add/edit/modify a configuration file to avoid >>> having to remember to unlink the microphone channels every time? >> >> We do this through a kernel patch usually. Can you submit alsa-info >> (see https://wiki.ubuntu.com/Audio/AlsaInfo )? >> > Thanks for the reply, please see: > > http://www.alsa-project.org/db/?f=de69a107ac63f0a3629cd16fe9b89d23ccef5888 Sorry for not replying earlier; I was hoping you had a Conexant or Realtek codec where we already have code for this, and can just add quirks. For IDT codec driver we need to write some extra code, and I can't promise I have time to do this right now. Sorry. > I upgraded to pulseaudio-2.1 and tried on another machine and the result is the same. > > Furthermore, looking in the "input devices" tab (see attached screenshot): > > 1. The usb headset microphone is correctly shown as a mono microphone, but the input level strip is missing. > > 2. The internal sound card microphone input level strip is present. > > > Looking at the "recording" tab (see attached screenshot): > > 1. The usb headset microphone is incorrectly shown as a stereo microphone > > 2. The input level strip is missing. > > 3. Even if I unlink the stereo channel lock, the input is not recorded. > > 4. If I swap to the internal sound card microphone, the input level strip reappears. > > > The Logitech usb headset must be a pretty common device, but its use appears broken as far as pulseaudio-2.0/2.1 are concerned? I have a Logitech usb headset and it works just fine (Ubuntu Quantal, which runs PulseAudio 2.1 and Linux 3.5 kernel). It gives a output-stereo + input-mono profile as default. -- David Henningsson, Canonical Ltd. https://launchpad.net/~diwic
