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skype does not see USB microphone on startup
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v_andal
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Location: Germany

PostPosted: Tue Dec 11, 2012 7:42 am    Post subject: skype does not see USB microphone on startup Reply with quote

I got really weird problem. I use Logitech Webcam with built-in microphone. Until recently Skype didn't have any issues using it. Everything changed after latest upgrade (to version 4.1.0.20). Now when I start it, microphone does not work. If I reapply configuration (for example clear "Allow Skype automatically adjust my mixer levels" and hit Apply), then everything starts working again. (Next time I set that option again, to get things working :) )

All I see on stderr are messages

ALSA lib pcm_dmix.c:1018:(snd_pcm_dmix_open) unable to open slave

Besides, Skype constantly uses about 2-3% of CPU, but that might be not related to the problem.

Any advice?

Code:

% cat /proc/asound/cards
 0 [PCH            ]: HDA-Intel - HDA Intel PCH
                      HDA Intel PCH at 0xfe420000 irq 47
 1 [U0x46d0x9a4    ]: USB-Audio - USB Device 0x46d:0x9a4
                      USB Device 0x46d:0x9a4 at usb-0000:00:1a.0-1.3, high speed


Code:

% lsusb
Bus 001 Device 003: ID 046d:09a4 Logitech, Inc. QuickCam E 3500
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audiodef
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Joined: 06 Jul 2005
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PostPosted: Tue Dec 11, 2012 1:52 pm    Post subject: Reply with quote

There have been other similar bugs lately. Must be something going around. After my last update, I have to select normal subtitles in smplayer (whether I use subs or not) in order for smplayer not to crash when I play a DVD. I have to do this every time I run smplayer.

Maybe try mv'ing the skype user config dir and letting skype recreate it from scratch?
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v_andal
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PostPosted: Wed Dec 12, 2012 7:48 am    Post subject: Reply with quote

Well, so far I've downgraded Skype to previous version. I guess I'll wait till next version comes out and see how that one will perform.
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audiodef
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PostPosted: Wed Dec 12, 2012 1:49 pm    Post subject: Reply with quote

It happens. I've masked specific versions of things because they just. Didn't. Work.
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Fred Krogh
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PostPosted: Fri Dec 14, 2012 9:58 pm    Post subject: Reply with quote

If you updated your kernel to 3.7.0 recently, you may want to look there. I had the same problem and discovered under Device Drivers, Multimedia support, enabling Media USB Adapters, and GSPCA based webcams (maybe not necessary?) fixed my problem (after recompiling the kernel and rebooting of course).
Fred
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zwede
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PostPosted: Sun Dec 16, 2012 8:10 pm    Post subject: Reply with quote

In my case I had to go to Multimedia support->Media USB Adapters and select "USB Video Class (UVC)", CONFIG_USB_VIDEO_CLASS.

I had it working fine in 3.6.6 and the options were selected in 3.6.6. But during the "make oldconfig" for 3.7.0 it seems to have deselected itself? I did not have to select "GSPCA", btw.

My webcam is a Logitech.
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v_andal
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PostPosted: Mon Dec 17, 2012 8:05 am    Post subject: Reply with quote

No, I still have 3.5.7 and as far as I can see Multimedia support section does not have Media USB Adapters.

Well, maybe newer Skype uses some new features from newer kernels, that are not available in mine. So in this case downgrading is the proper way to handle things, since I use "stable" gentoo-sources and "development" version of Skype.
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