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

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