Comment 0 for bug 1650796

Problem was discovered on Dell 6400 laptop (32-bit) after upgrading Ubuntu 14.04 to 16.40.
Launching Cheese with Live! Cam Connect HD VF0750 webcam *sometimes* (randomly) gives no video, only black image. No errors are reported on GUI, console and syslog.

You can start Cheese again and it might start video, but sometimes not, randomly. In case when there is no image, opening Settings and changing resolution makes video appear!

Tried to downgrade libv4l-0, libv4lconvert0 to 14.04 version (1.0.1 I believe) but it did not helped. Upgrading to Linux 4.8 (from hwe package) did not helped either.

On other laptop with Ubuntu 14.04 (with same 4.4 kernel from hwe package) there is no issues as such, so I assume it's bug with Cheese itself.

Interestingly, on yet other laptop (Asus N551JM) with Kubuntu 16.04 Cheese does not show video on launch always (tested with many restarts of Cheese app). If I change resolution in Settings, it does start to show video thought. That computer is faster than Dell 6400 one, so I'm guessing it could be some kind race condition..?

I cannot reproduce this issue with Camorama for example, it seems it always starts video successfully for this webcam.

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: cheese 3.18.1-2ubuntu3
ProcVersionSignature: Ubuntu 4.4.0-53.74-generic 4.4.30
Uname: Linux 4.4.0-53-generic x86_64
ApportVersion: 2.20.1-0ubuntu2.4
Architecture: amd64
Date: Sat Dec 17 21:15:27 2016
InstallationDate: Installed on 2015-06-25 (541 days ago)
InstallationMedia: Kubuntu 14.04.2 LTS "Trusty Tahr" - Release amd64 (20150219.1)
MachineType: ASUSTeK COMPUTER INC. N551JM
ProcEnviron:
 LANGUAGE=lt
 TERM=screen-256color
 PATH=(custom, no user)
 LANG=lt_LT.UTF-8
 SHELL=/bin/bash
RelatedPackageVersions:
 cheese 3.18.1-2ubuntu3
 cheese-common 3.18.1-2ubuntu3
SourcePackage: linux
UpgradeStatus: Upgraded to xenial on 2016-07-30 (139 days ago)
dmi.bios.date: 02/13/2015
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: N551JM.205
dmi.board.asset.tag: ATN12345678901234567
dmi.board.name: N551JM
dmi.board.vendor: ASUSTeK COMPUTER INC.
dmi.board.version: 1.0
dmi.chassis.type: 10
dmi.chassis.vendor: ASUSTeK COMPUTER INC.
dmi.chassis.version: 1.0
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrN551JM.205:bd02/13/2015:svnASUSTeKCOMPUTERINC.:pnN551JM:pvr1.0:rvnASUSTeKCOMPUTERINC.:rnN551JM:rvr1.0:cvnASUSTeKCOMPUTERINC.:ct10:cvr1.0:
dmi.product.name: N551JM
dmi.product.version: 1.0
dmi.sys.vendor: ASUSTeK COMPUTER INC.