Greetings.
On Sun, 11 Jul 2021 12:38:12 +0200, Greg KH gregkh@linuxfoundation.org wrote:
On Sun, Jul 11, 2021 at 10:25:03AM +0200, Tristan Miller wrote:
Many models of Logitech USB webcams malfunction under Linux by producing audio that sounds distorted, garbled, or high-pitched. For most users, the problem happens randomly, and can usually be worked around by restarting the audio application or by unplugging the webcam and then plugging it back in again.
Please report the information directly here, to this list, and to the sound developers at alsa-devel@alsa-project.org and we can all work to resolve this.
The problem as I'm currently experiencing it is as follows:
I have a Logitech C270 USB webcam running on openSUSE Tumbleweed for x86_64 with the 5.13.0 kernel. Sometimes audio recorded by the camera's built-in microphone sounds artificially high-pitched and garbled. I've experienced this with lots of different applications, including arecord, Skype, and various browser-based videoconferencing software running in Firefox or Chromium. The problem occurs rarely (maybe once every 30 times I use the webcam microphone) and seemingly at random; restarting the audio application or unplugging the webcam and plugging it back in again usually works around the issue. So unfortunately I can't reliably reproduce the problem. I haven't noticed any errors in the system logs but then again am not sure exactly what to look for and where. I've been experiencing this problem at least as far back as kernel 4.13.12.
Some further details (more available on request):
# uname -a Linux butterfield.nothingisreal.com 5.13.0-1-default #1 SMP Fri Jul 2 05:54:32 UTC 2021 (aa40472) x86_64 x86_64 x86_64 GNU/Linux
# lsusb -s 001:004 -v |head -17 Bus 001 Device 004: ID 046d:0825 Logitech, Inc. Webcam C270 Device Descriptor: bLength 18 bDescriptorType 1 bcdUSB 2.00 bDeviceClass 239 Miscellaneous Device bDeviceSubClass 2 bDeviceProtocol 1 Interface Association bMaxPacketSize0 64 idVendor 0x046d Logitech, Inc. idProduct 0x0825 Webcam C270 bcdDevice 0.10 iManufacturer 0 iProduct 0 iSerial 2 6457F4D0 bNumConfigurations
Previous reports which apparently cover the same problem:
https://bugzilla.kernel.org/show_bug.cgi?id=35922 https://bugzilla.kernel.org/show_bug.cgi?id=44281 https://bugzilla.kernel.org/show_bug.cgi?id=105081 https://bugzilla.kernel.org/show_bug.cgi?id=203763 https://bugs.launchpad.net/ubuntu/+source/linux/+bug/459445 https://bugs.launchpad.net/ubuntu/+source/linux/+bug/843431 https://bugs.launchpad.net/ubuntu/+source/linux/+bug/884210 https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1018020 https://bugzilla.suse.com/show_bug.cgi?id=736093 https://bugzilla.redhat.com/show_bug.cgi?id=729269 https://bugzilla.redhat.com/show_bug.cgi?id=742010 https://bugs.archlinux.org/task/26528 https://bbs.archlinux.org/viewtopic.php?id=121607 https://bbs.archlinux.org/viewtopic.php?id=236056 https://forums.linuxmint.com/viewtopic.php?t=237677
Regards, Tristan