I'm frequently seeing display artifacts in my daily use. One situation where I commonly see them is scrolling on web pages, where they appear as groups of thin lines that appear for a moment then go away. Another place I see them is when the mouse pointer moves, where some of the pixels remain at previous pointer locations briefly before disappearing. I get the impression that these are related, as though some pixels from screen lag in getting updated when something changes.
ProblemType: Bug
DistroRelease: Ubuntu 13.10
Package: unity-system-compositor 0.0.1+13.10.20130903-0ubuntu1
ProcVersionSignature: Ubuntu 3.11.0-4.9-generic 3.11.0-rc7
Uname: Linux 3.11.0-4-generic x86_64
ApportVersion: 2.12.1-0ubuntu3
Architecture: amd64
Date: Thu Sep 5 13:57:26 2013
EcryptfsInUse: Yes
GraphicsCard:
Intel Corporation 3rd Gen Core processor Graphics Controller [8086:0166] (rev 09) (prog-if 00 [VGA controller])
Subsystem: Apple Inc. Device [106b:00eb]
InstallationDate: Installed on 2012-10-24 (316 days ago)
InstallationMedia: Ubuntu 12.10 "Quantal Quetzal" - Release amd64 (20121017.5)
LightDMLog: Error: [Errno 13] Permission denied: '/var/log/lightdm/lightdm.log'
MarkForUpload: True
SourcePackage: unity-system-compositor
UnitySystemCompositorLog: Error: [Errno 13] Permission denied: '/var/log/lightdm/unity-system-compositor.log'
UpgradeStatus: Upgraded to saucy on 2013-05-01 (127 days ago)
version.libdrm: libdrm2 2.4.46-1
version.lightdm: lightdm 1.7.12-0ubuntu1
version.mesa: libegl1-mesa-dev N/A
Thank you for taking the time to report this bug and helping to make Ubuntu better. This particular bug has already been reported and is a duplicate of bug 1218735, so it is being marked as such. Please look at the other bug report to see if there is any missing information that you can provide, or to see if there is a workaround for the bug. Additionally, any further discussion regarding the bug should occur in the other report. Feel free to continue to report any other bugs you may find.