Public bug reported: I'm getting random flickering horizontal lines (some very short, only 20-30 pixels long, but some extending nearly the entire width of the screen) in my display output. I verified the connection cable running the same resolution and frequency on a MacBook Pro with no flickering output.
I'm running a high-resolution external display (2560x1440) at 60Hz. It seems to occur more when I'm running at high res than at lower resolutions. And if running on internal display only the problem is even less visible. In any mode scenario I try though, the flickering gets worse over time, and resets for a period after resetting the mode via xrandr. The problem has occurred for me on kernels 3.11.0-12, 3.11.0-17, 3.13.0-11 and now on 3.13.0.13. Running Trusty (14.04) xserver-xorg-video-intel: Installed: 2:2.99.910-0ubuntu1 ProblemType: Bug DistroRelease: Ubuntu 14.04 Package: xserver-xorg-video-intel 2:2.99.910-0ubuntu1 ProcVersionSignature: Ubuntu 3.13.0-13.33-generic 3.13.5 Uname: Linux 3.13.0-13-generic x86_64 .tmp.unity.support.test.0: ApportVersion: 2.13.2-0ubuntu5 Architecture: amd64 CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins' CompositorRunning: compiz CompositorUnredirectDriverBlacklist: '(nouveau|Intel).*Mesa 8.0' CompositorUnredirectFSW: true CurrentDesktop: Unity Date: Fri Feb 28 16:50:56 2014 DistUpgraded: 2014-02-20 22:35:53,373 ERROR got an error from dpkg for pkg: 'gcc-4.9-base': 'no package named `gcc-4.9-base' is installed, cannot configure' DistroCodename: trusty DistroVariant: ubuntu EcryptfsInUse: Yes ExtraDebuggingInterest: Yes, including running git bisection searches GraphicsCard: Intel Corporation Haswell-ULT Integrated Graphics Controller [8086:0a16] (rev 09) (prog-if 00 [VGA controller]) Subsystem: Dell Device [1028:05e3] InstallationDate: Installed on 2014-02-20 (7 days ago) InstallationMedia: Kubuntu 13.10 "Saucy Salamander" - Release amd64 (20131016.1) LightdmGreeterLog: QInotifyFileSystemWatcherEngine::addPaths: inotify_add_watch failed: No such file or directory QFileSystemWatcher: failed to add paths: /var/lib/lightdm/.config/ibus/bus Bus::open: Can not get ibus-daemon's address. IBusInputContext::createInputContext: no connection to ibus-daemon file:///usr/share/kde4/apps/lightdm-kde-greeter/themes/userbar/main.qml:135: Unable to assign [undefined] to QString usersession LightdmGreeterLogOld: QInotifyFileSystemWatcherEngine::addPaths: inotify_add_watch failed: No such file or directory QFileSystemWatcher: failed to add paths: /var/lib/lightdm/.config/ibus/bus Bus::open: Can not get ibus-daemon's address. IBusInputContext::createInputContext: no connection to ibus-daemon file:///usr/share/kde4/apps/lightdm-kde-greeter/themes/userbar/main.qml:135: Unable to assign [undefined] to QString usersession MachineType: Dell Inc. XPS 12-9Q33 ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-13-generic.efi.signed root=UUID=085f457a-4960-450b-ad94-40bdb43fcfd4 ro quiet splash vt.handoff=7 SourcePackage: xserver-xorg-video-intel UpgradeStatus: Upgraded to trusty on 2014-02-21 (7 days ago) dmi.bios.date: 07/26/2013 dmi.bios.vendor: Dell Inc. dmi.bios.version: A02 dmi.board.name: XPS 12-9Q33 dmi.board.vendor: Dell Inc. dmi.board.version: A02 dmi.chassis.type: 8 dmi.chassis.vendor: Dell Inc. dmi.chassis.version: Not Specified dmi.modalias: dmi:bvnDellInc.:bvrA02:bd07/26/2013:svnDellInc.:pnXPS12-9Q33:pvrA02:rvnDellInc.:rnXPS12-9Q33:rvrA02:cvnDellInc.:ct8:cvrNotSpecified: dmi.product.name: XPS 12-9Q33 dmi.product.version: A02 dmi.sys.vendor: Dell Inc. version.compiz: compiz 1:0.9.11+14.04.20140218-0ubuntu1 version.ia32-libs: ia32-libs N/A version.libdrm2: libdrm2 2.4.52-1 version.libgl1-mesa-dri: libgl1-mesa-dri 10.1.0~rc1-1ubuntu4 version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A version.libgl1-mesa-glx: libgl1-mesa-glx 10.1.0~rc1-1ubuntu4 version.xserver-xorg-core: xserver-xorg-core 2:1.15.0-1ubuntu6 version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.8.2-1ubuntu2 version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.3.0-1ubuntu3 version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.910-0ubuntu1 version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.10-1ubuntu2 xserver.bootTime: Fri Feb 28 16:37:00 2014 xserver.configfile: default xserver.errors: xserver.logfile: /var/log/Xorg.0.log xserver.outputs: product id 1027 vendor LGD xserver.version: 2:1.15.0-1ubuntu6 ** Affects: xserver-xorg-video-intel (Ubuntu) Importance: Undecided Status: New ** Tags: amd64 apport-bug compiz-0.9 trusty ubuntu -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xserver-xorg-video-intel in Ubuntu. https://bugs.launchpad.net/bugs/1286365 Title: Random Flickering lines in X display on Intel Haswell integrated graphics To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-intel/+bug/1286365/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp