integrated web cam stopped working suddenly

[Christopher Barrington-Leigh]

I'm on a Lenovo X230T running Ubuntu 14.04 and I regularly video chat for work.
2.5 weeks ago, my camera didn't come on during google chrome google video chat.
It still worked when I ran cheese.
Then, it stopped work under cheese, g-chat, or skype. It didn't work even when I booted into 14.10 or 15.04.

Then, a week ago, after another update, it began working normally again.
Yesterday, during a gchat , my video suddenly went off and now the integrated camera doesn't work again under guvcview or cheese or etc. An external camera works.

Once again, this problem is consistent across operating systems.

ProblemType: Bug
DistroRelease: Ubuntu 15.04
Package: linux-image-3.19.0-9-generic 3.19.0-9.9
ProcVersionSignature: Ubuntu 3.19.0-9.9-generic 3.19.1
Uname: Linux 3.19.0-9-generic x86_64
ApportVersion: 2.16.2-0ubuntu3
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: cpbl 3458 F.... pulseaudio
CurrentDesktop: Unity
Date: Tue Mar 17 16:24:59 2015
EcryptfsInUse: Yes
InstallationDate: Installed on 2015-03-07 (9 days ago)
InstallationMedia: Ubuntu 15.04 "Vivid Vervet" - Alpha amd64 (20150306)
MachineType: LENOVO 34372VU
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.19.0-9-generic root=UUID=6122b2f3-86a4-47d0-9e71-588428e86b7b ro quiet splash vt.handoff=7
RelatedPackageVersions:
 linux-restricted-modules-3.19.0-9-generic N/A
 linux-backports-modules-3.19.0-9-generic N/A
 linux-firmware 1.143
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 05/28/2014
dmi.bios.vendor: LENOVO
dmi.bios.version: GCET99WW (2.59 )
dmi.board.asset.tag: Not Available
dmi.board.name: 34372VU
dmi.board.vendor: LENOVO
dmi.board.version: Not Defined
dmi.chassis.asset.tag: No Asset Information
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: Not Available
dmi.modalias: dmi:bvnLENOVO:bvrGCET99WW(2.59):bd05/28/2014:svnLENOVO:pn34372VU:pvrThinkPadX230Tablet:rvnLENOVO:rn34372VU:rvrNotDefined:cvnLENOVO:ct10:cvrNotAvailable:
dmi.product.name: 34372VU
dmi.product.version: ThinkPad X230 Tablet
dmi.sys.vendor: LENOVO

[Brad Figg (brad-figg)]

This change was made by a bot.

[Christopher Barrington-Leigh (cpbl)]

No change after BIOS update. (which seemed only a security release; not sure why you suspected that.)

 sudo dmidecode -s bios-version && sudo dmidecode -s bios-release-date
GCETA1WW (2.61 )
02/12/2015

I can't reproduce what happened in the past in more detail.
Here's what happens now:

After unplugging the external USB camera which I've now attached, running cheese gives stderr (/stdout):

$ cheese
libv4l2: error setting pixformat: Device or resource busy
libv4l2: error setting pixformat: Device or resource busy

(cheese:15898): cheese-WARNING **: Device '/dev/video1' is busy: gstv4l2object.c(2838): gst_v4l2_object_set_format (): /GstCameraBin:camerabin/GstWrapperCameraBinSrc:camera_source/GstBin:bin18/GstV4l2Src:video_source:
Call to S_FMT failed for YU12 @ 352x288: Device or resource busy

guvcview gives:

$ guvcview
V4L2_CORE: ERROR opening V4L interface: No such file or directory

lsusb gives:

$ lsusb
Bus 004 Device 003: ID 056a:00e6 Wacom Co., Ltd
Bus 004 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub
Bus 004 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 003 Device 005: ID 04f2:b2ea Chicony Electronics Co., Ltd Integrated Camera [ThinkPad]
... etc

[penalvch (penalvch)]

Christopher Barrington-Leigh, could you please test the latest upstream kernel available from the very top line at the top of the page (the release names are irrelevant for testing, and please do not test the daily folder) following https://wiki.ubuntu.com/KernelMainlineBuilds ? It will allow additional upstream developers to examine the issue.

If the test did not allow you to test to the issue (ex. you couldn't boot into the OS) please make a comment in your report about this, and continue to test the next most recent kernel version until you can test to the issue. Once you've tested the upstream kernel, please comment on which kernel version specifically you tested. If this bug is fixed in the mainline kernel, please add the following tags by clicking on the yellow circle with a black pencil icon, next to the word Tags, located at the bottom of the report description:
kernel-fixed-upstream
kernel-fixed-upstream-3.XY-rcZ

Where XY and Z are numbers corresponding to the kernel version.

If the mainline kernel does not fix this bug, please add the following tags:
kernel-bug-exists-upstream
kernel-bug-exists-upstream-3.XY-rcZ

Once testing of the upstream kernel is complete, please mark this bug's Status as Confirmed. Please let us know your results.

Thank you for your understanding.

[Launchpad Janitor (janitor)]

[Expired for linux (Ubuntu) because there has been no activity for 60 days.]