Ok, it seems like this bug is not reproduced every time I plug webcam.
This time webcam was hooked up successfully, revealing following in
`pactl list cards`:
Card #4
Name: alsa_card.usb-046d_0825_FCE88FE0-02-U0x46d0x825
Driver: module-alsa-card.c
Owner Module: 26
Properties:
alsa.card = "2"
alsa.card_name = "USB Device 0x46d:0x825"
alsa.long_card_name = "USB Device 0x46d:0x825 at
usb-0000:00:12.2-5, high speed"
alsa.driver_name = "snd_usb_audio"
device.bus_path = "pci-0000:00:12.2-usb-0:5:1.2"
sysfs.path =
"/devices/pci0000:00/0000:00:12.2/usb1/1-5/1-5:1.2/sound/card2"
udev.id = "usb-046d_0825_FCE88FE0-02-U0x46d0x825"
device.bus = "usb"
device.vendor.id = "046d"
device.vendor.name = "Logitech, Inc."
device.product.id = "0825"
device.product.name = "Webcam C270"
device.serial = "046d_0825_FCE88FE0"
device.form_factor = "webcam"
device.string = "2"
device.description = "Webcam C270"
module-udev-detect.discovered = "1"
device.icon_name = "camera-web-usb"
Profiles:
input:analog-mono: Analog Mono Input (sinks: 0, sources: 1,
priority. 1)
off: Off (sinks: 0, sources: 0, priority. 0)
Active Profile: input:analog-mono
Ports:
analog-input-microphone: Microphone (priority: 8700)
Part of profile(s): input:analog-mono
Nevertheless, kern.log had following after plugging webcam in:
Jan 6 20:52:44 t-rex kernel: [30006.048355] usb 1-5: new high-speed USB device
number 6 using ehci_hcd
Jan 6 20:52:45 t-rex kernel: [30006.396631] usb 1-5: New USB device found,
idVendor=046d, idProduct=0825
Jan 6 20:52:45 t-rex kernel: [30006.396644] usb 1-5: New USB device strings:
Mfr=0, Product=0, SerialNumber=2
Jan 6 20:52:45 t-rex kernel: [30006.396652] usb 1-5: SerialNumber: FCE88FE0
Jan 6 20:52:45 t-rex kernel: [30006.398104] uvcvideo: Found UVC 1.00 device
<unnamed> (046d:0825)
Jan 6 20:52:45 t-rex kernel: [30006.495377] input: UVC Camera (046d:0825) as
/devices/pci0000:00/0000:00:12.2/usb1/1-5/1-5:1.0/input/input19
Jan 6 20:52:46 t-rex kernel: [30007.502483] 6:3:3: cannot set freq 32000 to ep
0x86
Note "32000" in last line instead of "48000" as in original issue.
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https://bugs.launchpad.net/bugs/1007542
Title:
pulseaudio stops responding after plugging Logitech webcam in
Status in “pulseaudio” package in Ubuntu:
Confirmed
Bug description:
Repro: plug Logitech C270 (one I have) webcam in USB port (others with
builtin microphone are affected most likely)
Expected: device hooks up and works properly
Actual behavior: pulseaudio becomes unresponsive (totem freezes, volume
controls work with huge delay, sound is not played at all), dmesg becomes
flooded with messages like "7:3:4: cannot set freq 48000 to ep 0x86"
After unplugging webcam pulseaudio becomes responsive again.
ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: pulseaudio 1:1.1-0ubuntu15.1
ProcVersionSignature: Ubuntu 3.2.0-25.40-generic-pae 3.2.18
Uname: Linux 3.2.0-25-generic-pae i686
NonfreeKernelModules: nvidia
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24.
ApportVersion: 2.0.1-0ubuntu8
Architecture: i386
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/pcmC1D0c: andy 17317 F...m pulseaudio
/dev/snd/controlC2: andy 17317 F.... pulseaudio
/dev/snd/controlC0: andy 17317 F.... pulseaudio
Card0.Amixer.info:
Card hw:0 'SB'/'HDA ATI SB at 0xfbff4000 irq 16'
Mixer name : 'Realtek ALC889'
Components : 'HDA:10ec0889,14627388,00100004'
Controls : 47
Simple ctrls : 23
Card1.Amixer.info:
Card hw:1 'U0x46d0x825'/'USB Device 0x46d:0x825 at usb-0000:00:12.2-2, high
speed'
Mixer name : 'USB Mixer'
Components : 'USB046d:0825'
Controls : 2
Simple ctrls : 1
Card1.Amixer.values:
Simple mixer control 'Mic',0
Capabilities: cvolume cvolume-joined cswitch cswitch-joined penum
Capture channels: Mono
Limits: Capture 0 - 6144
Mono: Capture 6144 [100%] [30.00dB] [off]
Card2.Amixer.info:
Card hw:2 'NVidia'/'HDA NVidia at 0xfeafc000 irq 19'
Mixer name : 'Nvidia GPU 16 HDMI/DP'
Components : 'HDA:10de0016,10de0101,00100100'
Controls : 25
Simple ctrls : 5
Date: Fri Jun 1 19:48:01 2012
SourcePackage: pulseaudio
UpgradeStatus: Upgraded to precise on 2012-04-26 (35 days ago)
dmi.bios.date: 05/12/2010
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: V8.6
dmi.board.asset.tag: To Be Filled By O.E.M.
dmi.board.name: 770T-C45 (MS-7388)
dmi.board.vendor: MICRO-STAR INTERNATIONAL CO.,LTD
dmi.board.version: 3.0
dmi.chassis.asset.tag: To Be Filled By O.E.M.
dmi.chassis.type: 3
dmi.chassis.vendor: MICRO-STAR INTERNATIONAL CO.,LTD
dmi.chassis.version: 3.0
dmi.modalias:
dmi:bvnAmericanMegatrendsInc.:bvrV8.6:bd05/12/2010:svnMICRO-STARINTERNATIONALCO.,LTD:pnMS-7388:pvr3.0:rvnMICRO-STARINTERNATIONALCO.,LTD:rn770T-C45(MS-7388):rvr3.0:cvnMICRO-STARINTERNATIONALCO.,LTD:ct3:cvr3.0:
dmi.product.name: MS-7388
dmi.product.version: 3.0
dmi.sys.vendor: MICRO-STAR INTERNATIONAL CO.,LTD
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