** Description changed:
+ The webcam in Linux has a system that compensates the blinking of
+ lighting under alternate current. Which cannot be perceived by the human
+ eye, but when recorded it flickers the image.
+
+ The problem is that depending on the country you are the current blinks
+ either at 50 or 60 Hz. Linux has its frequency set to 60 Hz by default,
+ but using that one in a 50 Hz country renders the system noneffective,
+ getting likely the same flickering as there was no compensatory system
+ in place.
+
+ You can see the effect in the following video:
https://youtu.be/RJU-JmSPF2k
+
+ The computer needs to detect that you are in a 50 Hz country, and change
+ the setting accordingly.
ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: cheese 3.18.1-2ubuntu3
ProcVersionSignature: Ubuntu 4.4.0-64.85-generic 4.4.44
Uname: Linux 4.4.0-64-generic x86_64
ApportVersion: 2.20.1-0ubuntu2.4
Architecture: amd64
CurrentDesktop: Unity
Date: Thu Feb 23 02:44:20 2017
InstallationDate: Installed on 2016-05-02 (296 days ago)
InstallationMedia: Ubuntu 16.04 LTS "Xenial Xerus" - Release amd64
(20160420.1)
MachineType: MEDIONPC MS-7358
RelatedPackageVersions:
cheese3.18.1-2ubuntu3
cheese-common 3.18.1-2ubuntu3
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 02/18/2008
dmi.bios.vendor: Phoenix Technologies, LTD
dmi.bios.version: 6.00 PG
dmi.board.name: MS-7358
dmi.board.vendor: MICRO-STAR INTERNATIONAL CO., LTD
dmi.board.version: Fab D
dmi.chassis.type: 3
dmi.chassis.vendor: OEM
dmi.chassis.version: OEM
dmi.modalias:
dmi:bvnPhoenixTechnologies,LTD:bvr6.00PG:bd02/18/2008:svnMEDIONPC:pnMS-7358:pvrOEM:rvnMICRO-STARINTERNATIONALCO.,LTD:rnMS-7358:rvrFabD:cvnOEM:ct3:cvrOEM:
dmi.product.name: MS-7358
dmi.product.version: OEM
dmi.sys.vendor: MEDIONPC
** Description changed:
The webcam in Linux has a system that compensates the blinking of
lighting under alternate current. Which cannot be perceived by the human
eye, but when recorded it flickers the image.
The problem is that depending on the country you are the current blinks
either at 50 or 60 Hz. Linux has its frequency set to 60 Hz by default,
but using that one in a 50 Hz country renders the system noneffective,
getting likely the same flickering as there was no compensatory system
in place.
You can see the effect in the following video:
https://youtu.be/RJU-JmSPF2k
The computer needs to detect that you are in a 50 Hz country, and change
the setting accordingly.
-
- ProblemType: Bug
- DistroRelease: Ubuntu 16.04
- Package: cheese 3.18.1-2ubuntu3
- ProcVersionSignature: Ubuntu 4.4.0-64.85-generic 4.4.44
- Uname: Linux 4.4.0-64-generic x86_64
- ApportVersion: 2.20.1-0ubuntu2.4
- Architecture: amd64
- CurrentDesktop: Unity
- Date: Thu Feb 23 02:44:20 2017
- InstallationDate: Installed on 2016-05-02 (296 days ago)
- InstallationMedia: Ubuntu 16.04 LTS "Xenial Xerus" - Release amd64
(20160420.1)
- MachineType: MEDIONPC MS-7358
- RelatedPackageVersions:
- cheese3.18.1-2ubuntu3
- cheese-common 3.18.1-2ubuntu3
- SourcePackage: linux
- UpgradeStatus: No upgrade log present (probably fresh install)
- dmi.bios.date: 02/18/2008
- dmi.bios.vendor: Phoenix Technologies, LTD
- dmi.bios.version: 6.00 PG
- dmi.board.name: MS-7358
- dmi.board.vendor: MICRO-STAR INTERNATIONAL CO., LTD
- dmi.board.version: Fab D
- dmi.chassis.type: 3
- dmi.chassis.vendor: OEM
- dmi.chassis.version: OEM
- dmi.modalias:
dmi:bvnPhoenixTechnologies,LTD:bvr6.00PG:bd02/18/2008:svnMEDIONPC:pnMS-7358:pvrOEM:rvnMICRO-STARINTERNATIONALCO.,LTD:rnMS-7358:rvrFabD:cvnOEM:ct3:cvrOEM:
- dmi.product.name: MS-7358
- dmi.product.version: OEM
- dmi.sys.vendor: MEDIONPC
** Package changed: cheese (Ubuntu) => linux (Ubuntu)
** Changed in: linux (Ubuntu)
Status: Triaged => In Progress
** Changed in: linux (Ubuntu)
Status: In Progress => Confirmed
** Summary changed:
- Image flickering with 50 Hz lighting
+ Webcam flickering with 50 Hz lighting
** Summary changed:
- Webcam flickering with 50 Hz lighting
+ Webcam flickers with 50 Hz lighting
** Description changed:
The webcam in Linux has a system that compensates the blinking of
lighting under alternate current. Which cannot be perceived by the human
eye, but when recorded it flickers the image.
The problem is that depending on the country you are the current blinks
either at 50 or 60 Hz. Linux has its frequency set to 60 Hz by default,
but using that one in a 50 Hz country renders the system noneffective,
- getting likely the same flickering as there was no compensatory system
- in place.
+ getting likely the same flickering as if there was no compensatory
+ system in place.
You can see the effect in the following video:
https://youtu.be/RJU-JmSPF2k
The computer needs to detect that you are in a 50 Hz country, and change
the setting accordingly.
