Red Hat Bugzilla – Bug 1305278
In KDE plasma incorrect recording device is selected by default
Last modified: 2016-12-20 13:29:25 EST
Created attachment 1121684 [details]
default pavucontrol when video conference is started
Description of problem:
I am running Fedora23 on a Precision Dell T1700 with integrated audio:
[kambiz@vorlon ]$ sudo lspci | grep -i audio
00:03.0 Audio device: Intel Corporation Xeon E3-1200 v3/4th Gen Core Processor HD Audio Controller (rev 06)
00:1b.0 Audio device: Intel Corporation 8 Series/C220 Series Chipset High Definition Audio Controller (rev 04)
I also have a USB based Logitech C270 WebCam attached to the system. I run KDE plasma, and though I can use the webcam for audio input (recording), applications never default to using the webcam microphone and I have to run pavucontrol to change the audio recording source.
I'm attaching screenshots to illustrate.
I will use bluejeans as an example (though all applications behave the same way)
Steps to Reproduce:
1. Go to system settings
2. select multimedia
3. choose audio and video on the left side bar
4. Under the audio recording section for:
select the "Built-n Audio Analog Stereo" input device and select "Defer" at the bottom to change the order of preference. (The "Webcam C270 Analog Mono" device is also listed and is now first in the list)
5. connect to some video conferencing type service (bluejeans, viber, google hangouts, whatever).
6. Remote parties will not be able to hear you.
7. Launch "pavucontrol"
8. Note that the selected audio source for the application requiring recording is the Built-in Audio Analog source.
9. Manually change it in the "pavucontrol" application and now recording works.
Sometimes the initial recording source is correctly selected as the USB webcam, but after the initial usage, after a couple of seconds it changes to the built-in source and has to be manually changed via pavucontrol. Once it is changed, it does persist during the duration of the application. However, if one leaves the video conference and connects to a new conference, the same problem returns requiring manually changing the audio recording source.
Created attachment 1121685 [details]
Manually changing the audio source and things work
One more update on this, when I join a conference call, and I have "pavucontrol" open, it clearly lists the "Webcam C270 Analog Mono" as the recording source, until I start speaking ("testing 1 2 3") at which point it automatically switches to the built in source. Manually switching it back to the C270 source works, and the setting stays on the C270 for the duration of the call.
Try setting device priorities under
systemsettings5 -> multimedia -> audio&video -> device preference(tab)
The device priorities were set already but the behavior was still not as I would expect. However, my immediate problem is solved by changing the profile settings in the pavucontrol so that for the build in audio, I am using "output only" as opposed to duplex. In this way pulseaudio only uses the build in card for output only. I'm really not sure if this is a bug or if this is expected behavior, but just in case someone else runs into this, note that it was under the configuration tab of pavucontrol that I was able to resolve the issue.
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