After upgrading my Inspiron 6400 laptop (32-bit) from 14.04 to 16.04, launching Cheese with Live! Cam Connect HD VF0750 webcam *sometimes* (randomly) gives no video, only black image. No errors are reported on GUI, console, or 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.
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ApportVersion: 2.20.1-0ubuntu2.4
Architecture: i386
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC1: petras 2060 F.... pulseaudio
/dev/snd/controlC0: petras 2060 F.... pulseaudio
CurrentDesktop: Unity
DistroRelease: Ubuntu 16.04
InstallationDate: Installed on 2011-11-23 (1851 days ago)
InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Release i386 (20111012)
MachineType: Dell Inc. MM061
Package: linux (not installed)
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.8.0-30-generic root=UUID=b57d1858-e7f3-42a3-a7ef-5e7ab8dd5ae4 ro quiet splash vt.handoff=7
ProcVersionSignature: Ubuntu 4.8.0-30.32~16.04.1-generic 4.8.6
RelatedPackageVersions:
linux-restricted-modules-4.8.0-30-generic N/A
linux-backports-modules-4.8.0-30-generic N/A
linux-firmware 1.157.6
RfKill:
0: phy0: Wireless LAN
Soft blocked: no
Hard blocked: no
Tags: xenial
Uname: Linux 4.8.0-30-generic i686
UpgradeStatus: Upgraded to xenial on 2016-11-19 (28 days ago)
UserGroups: adm admin cdrom dialout lpadmin plugdev sambashare uucp
_MarkForUpload: True
dmi.bios.date: 06/09/2006
dmi.bios.vendor: Dell Inc.
dmi.bios.version: A06
dmi.board.name: 0KD882
dmi.board.vendor: Dell Inc.
dmi.chassis.type: 8
dmi.chassis.vendor: Dell Inc.
dmi.modalias: dmi:bvnDellInc.:bvrA06:bd06/09/2006:svnDellInc.:pnMM061:pvr:rvnDellInc.:rn0KD882:rvr:cvnDellInc.:ct8:cvr:
dmi.product.name: MM061
dmi.sys.vendor: Dell Inc.
This bug is missing log files that will aid in diagnosing the problem. From a terminal window please run:
apport-collect 1650796
and then change the status of the bug to 'Confirmed'.
If, due to the nature of the issue you have encountered, you are unable to run this command, please add a comment stating that fact and change the bug status to 'Confirmed'.
This change has been made by an automated script, maintained by the Ubuntu Kernel Team.