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On 2012-07-06T13:46:56+00:00 joseph.salisbury wrote:

This is a regression from v3.4 final.  Many models of Logitech webcams
stopped working as starting in v3.5-rc1.

I was able to reproduce this bug with a Logitec C250. It's going to be a
little difficult to bisect since I ran into a USB bug that does allow
any USB devices to work.

The USB bug was fixed in v3.5-rc3, and I was able to reproduce the
webcam bug in that kernel.

So to recap testing:

v3.4 does not have this bug.
v3.5-rc1 has a separate USB bug preventing testing of the webcam.
v3.5-rc2 has a separate USB bug preventing testing of the webcam.
v3.5-rc3 the USB bug is fixed and the webcam bug is reproduced.
v3.5 daily still has the webcam bug.

There is also a bug opened on Launchpad[0] against the Ubuntu distro.
Hardware details and logs are available from there, or upon request.

[0] https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1018020

Reply at:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1018020/comments/26

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On 2012-07-06T13:55:23+00:00 joseph.salisbury wrote:

When trying to use the webcam, these messages are scrolled to syslog:


[ 319.719296] uvcvideo: Failed to set UVC probe control : -71 (exp. 26).
[ 319.723296] uvcvideo: Failed to set UVC probe control : -71 (exp. 26).
[ 319.727436] uvcvideo: Failed to set UVC probe control : -71 (exp. 26).

Reply at:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1018020/comments/28

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On 2012-07-06T16:59:01+00:00 joseph.salisbury wrote:

Message output from cheese when running v3.5-rc5:


** (cheese:2143): WARNING **: Device '/dev/video0' cannot capture at 640x480


** (cheese:2143): WARNING **: Could not negotiate format

Reply at:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1018020/comments/30

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On 2012-07-06T22:05:11+00:00 joseph.salisbury wrote:

I'm in the process of bisecting this now.  I should have an update
shortly.

Reply at:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1018020/comments/31

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On 2012-07-10T00:41:06+00:00 joseph.salisbury wrote:

I've bisected down to the commit that is causing this bug:

edcd3633e72a1590c4cf46befe5e6cd03b5aec3e - ALSA: snd-usb: switch over to
new endpoint streaming logic

However, the logic that caused this regression is in the following commit:
 8fdff6a319e7dac757c558bd283dc4577e68cde7 - ALSA: snd-usb: implement new 
endpoint streaming model

I attempted a simple revert, but it is not possible. The following commit is 
also involved:
d399ff9593e088d33fb38f5206c6427825892baa - ALSA: snd-usb: remove old streaming 
logic

This last commit just removes the obsolete unused code, which was
causing a kernel compile error.

Reply at:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1018020/comments/34

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On 2012-07-13T16:13:50+00:00 migo wrote:

See also complaints about this bad regression from users of different
Logitech webcams in bug 35922:

https://bugzilla.kernel.org/show_bug.cgi?id=35922#c31

Reply at:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1018020/comments/59

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On 2012-07-13T17:45:56+00:00 joseph.salisbury wrote:

For Ubuntu users, there is a test kernel available in a Launchpad
bug[0].

There is currently a fix for this being discussed on the alsa-devel
mailing list.  The fix should land in mainline soon.


[0] https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1018020

Reply at:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1018020/comments/60

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On 2012-07-16T12:53:52+00:00 kernelorg wrote:

Linux 3.5-rc7, containing the fix, is released. Works for me!

# uname -a
Linux ROMAN-5720ZG 3.5.0-rc7-custom #2 SMP PREEMPT Mon Jul 16 16:39:59 MSK 2012 
x86_64 GNU/Linux

One error message is still there, but it doesn't seem to affect the
webcam/microphone.

# dmesg | grep ep
[    8.706829] 3:3:1: cannot set freq 16000 to ep 0x86

Reply at:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1018020/comments/64

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On 2013-03-15T20:40:37+00:00 rotondi.simone wrote:

Hi , my webcam stop working properly again .  With the webcam plugged in
i can boot into the system just sometimes otherwise i get stuck after
login and i gnome tell me something went wrong .

#lsusb
Bus 001 Device 006: ID 046d:081b Logitech, Inc. Webcam C310

#uname -a :
Linux baltar 3.7.10-1-ARCH #1 SMP PREEMPT Thu Feb 28 09:50:17 CET 2013 x86_64 
GNU/Linux

#dmesg
[ 6181.589567] usb 1-3: USB disconnect, device number 6
[ 6189.879130] usb 1-3: new high-speed USB device number 7 using ehci_hcd
[ 6190.218371] uvcvideo: Found UVC 1.00 device <unnamed> (046d:081b)
[ 6190.315629] input: UVC Camera (046d:081b) as 
/devices/pci0000:00/0000:00:12.2/usb1/1-3/1-3:1.0/input/input19
[ 6191.447066] 7:3:4: cannot set freq 48000 to ep 0x86
[ 6192.445704] 7:3:4: cannot set freq 48000 to ep 0x86
[ 6193.444339] 7:3:4: cannot set freq 48000 to ep 0x86
[ 6194.442981] 7:3:4: cannot set freq 48000 to ep 0x86
[ 6195.441744] 7:3:4: cannot set freq 48000 to ep 0x86
[ 6196.440381] 7:3:4: cannot set freq 48000 to ep 0x86
[ 6197.439014] 7:3:4: cannot set freq 48000 to ep 0x86
[ 6198.437659] 7:3:4: cannot set freq 48000 to ep 0x86

Reply at:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1018020/comments/72

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On 2013-04-09T22:05:07+00:00 bigbedue wrote:

Same issue here with a Logitech webcam. System hangs on startup (after entering 
password in gdm to start gnome 3, but gdm startup is also terribly slow), 
printing the "cannot set freq" messages. 
Unplugging the webcam unlocks the system immediately.
This does not appear on *every* boot, could not reproduce why or why not.

# uname -a
Linux snake 3.8.5-1-ARCH #1 SMP PREEMPT Fri Mar 29 19:18:14 CET 2013 x86_64 
GNU/Linux

# lsusb
Device: Bus 001 Device 004: ID 046d:0825 Logitech, Inc. Webcam C270
(with -v): http://pastebin.com/5ZFCHwrk

# dmesg |grep freq
[    3.536882] 3:3:2: cannot set freq 24000 to ep 0x86
[    4.534103] 3:3:3: cannot set freq 32000 to ep 0x86
[    5.531430] 3:3:4: cannot set freq 48000 to ep 0x86
[   17.997410] 3:3:4: cannot set freq 48000 to ep 0x86
(...)
[   33.957226] 3:3:4: cannot set freq 48000 to ep 0x86
[   34.954442] 3:3:4: cannot set freq 48000 to ep 0x86
(...and over 9000 more)

Reply at:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1018020/comments/73

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On 2013-06-05T20:00:45+00:00 deminkirill wrote:

Please reopen this bug. It's still present in 3.8

Reply at:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1018020/comments/74

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On 2013-06-06T11:52:59+00:00 deminkirill wrote:

Same bug on the Launchpad (marked as high):
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/884210

Workaround:

rmmod -w snd-usb-audio
modprobe snd-usb-audio

It helps in 3.5 kernel always. But in 3.8 not always

Reply at:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1018020/comments/75

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On 2013-06-10T03:38:07+00:00 krellan wrote:

I can confirm this bug has reappeared, as another regression.  I'm
running 3.8.13 (Gentoo) and this bug just started happening.

Almost exactly once per second:

[  703.568622] 3:3:1: cannot set freq 16000 to ep 0x86
[  704.568285] 3:3:1: cannot set freq 16000 to ep 0x86
[  705.567824] 3:3:1: cannot set freq 16000 to ep 0x86
[  706.567485] 3:3:1: cannot set freq 16000 to ep 0x86

The desktop becomes unusable.  It seems that many desktop applications,
and the shell itself, are blocked on PulseAudio.  PulseAudio is stuck in
state "D": comatose.  It's never a good sign when processes are in state
"D"....

I was earlier running 3.7.10 (Gentoo) and this bug didn't happen at all
back then.

Workaround is to hit Control-Alt-F1 to escape your unusable desktop, go
to your text shell, start removing modules until you get rid of the
offending sound driver, then hopefully that will snap PulseAudio out of
its funk.  Then, you can return to your desktop, and although it will be
silent, you can use it again.

Reply at:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1018020/comments/76

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On 2015-09-27T17:10:19+00:00 brian wrote:

This bug is back.  I am seeing it in the 4.1.7-200.fc22.x86_64 kernel on
Fedora 22.  Camera is a Logitech Quickcam Pro 5000.

Reply at:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1018020/comments/77

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On 2015-12-31T17:41:33+00:00 mike.parker wrote:

Bug confirmed as present in 4.1.13-100.fc21.i686 on Fedora 21. Camera is
Logitech C310

Bus 001 Device 002: ID 046d:081b Logitech, Inc. Webcam C310

Reply at:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1018020/comments/78

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On 2016-01-04T03:51:14+00:00 sellis wrote:

Ditto look like issue is still present on Fedora 23 with
4.2.8-300.fc23.x86_64

Reply at:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1018020/comments/79

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On 2017-11-23T19:32:33+00:00 psychonaut wrote:

I believe I'm being affected by this bug.  Audio recorded by my Logitech
C270 is often artificially high-pitched, like a Chipmunk.  Reproducible
for me with kernel-default-4.13.12-1.1.x86_64 on openSUSE Tumbleweed.

Reply at:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1018020/comments/80

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  Logitech webcam not working

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