Linaro Ubuntu

04f2:a13b Microphone not working on USB Webcam

Bug #1037630 reported by Erik Andresen on 2012-08-16

This bug affects 3 people

Affects		Status	Importance	Assigned to	Milestone
	Linaro Ubuntu	New	Undecided	Unassigned
	linux (Ubuntu)	Confirmed	Medium	Unassigned

Bug Description

Microphone input is not working with at least one USB Webcam under Oneiric and Precise based Linaro Images:
"arecord -D hw:2,0 -f S16_LE -V mono /tmp/test.wav" only records silence.

Webcam that fails:
Pleomax 1.3MP UVC Webcam
ID 04f2:a13b Chicony Electronics Co., Ltd

Another webcam works.
The interesting part is, while the failing webcam does not work with e.g. 3.1.1-29-linaro-lt-omap kernel, it works with the vanilla 3.1 kernel!

A Workaround is adding the VID/PID to drivers/usb/core/quirks.c, see the attachment.

The following kernel bugs might be related:
https://bugzilla.kernel.org/show_bug.cgi?id=35922
https://bugzilla.kernel.org/show_bug.cgi?id=44281

Tags:

Revision history for this message

Erik Andresen (erik-f) wrote on 2012-08-16:

Workaround, not fix Edit (598 bytes, text/plain)

Revision history for this message

Launchpad Janitor (janitor) wrote on 2013-03-03:

Status changed to 'Confirmed' because the bug affects multiple users.

Changed in linux (Ubuntu):
status:	New → Confirmed

Revision history for this message

Gannet (ken20001) wrote on 2013-03-03:

Also have Webcam with microphone that fails:

Pleomax 1.3MP UVC Webcam
Bus 001 Device 002: ID 04f2:a13b Chicony Electronics Co., Ltd

Linux 3.5.0-25 x86_64
Kubuntu 12.10
KDE 4.10

Ubuntu Foundations Team Bug Bot (crichton) on 2013-03-03

tags:

added: patch

Revision history for this message

Joseph Salisbury (jsalisbury) wrote on 2013-03-05:

Would it be possible for you to test the latest upstream kernel? Refer to https://wiki.ubuntu.com/KernelMainlineBuilds . Please test the latest v3.8 kernel[0] (Not a kernel in the daily directory) and install both the linux-image and linux-image-extra .deb packages.

If this bug is fixed in the mainline kernel, please add the following tag 'kernel-fixed-upstream'.

If the mainline kernel does not fix this bug, please add the tag: 'kernel-bug-exists-upstream'.

If you are unable to test the mainline kernel, for example it will not boot, please add the tag: 'kernel-unable-to-test-upstream'.
Once testing of the upstream kernel is complete, please mark this bug as "Confirmed".

Thanks in advance.

[0] http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.9-rc1-raring/

Changed in linux (Ubuntu):
importance:	Undecided → Medium
status:	Confirmed → Incomplete

Revision history for this message

Erik Andresen (erik-f) wrote on 2013-03-05:

But upstream won't have the latest TI patches.
Iirc the camera worked on vanilla 3.1, just not on 3.1+ti/linaro which has quite a few USB patches

Revision history for this message

Gannet (ken20001) wrote on 2013-03-08:

The mainline kernel 3.8 does NOT fix this bug.

tags:	added: kernel-bug-exists-upstream
Changed in linux (Ubuntu):
status:	Incomplete → Confirmed

penalvch (penalvch) on 2013-08-04

affects:	linaro-ubuntu → linux
affects:	linux → linaro-ubuntu
summary:	- Microphone not working on some USB Webcams + 04f2:a13b Microphone not working on USB Webcam
tags:	added: needs-kernel-logs needs-upstream-testing regression-potential removed: usbaudio webcam