Weird horizontal lines on Unity display

[Jaime Aldair Trejo]

Weird horizontal lines appear on Unity display.... They corrupt the normal interface....

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: unity 7.2.4+14.04.20141217-0ubuntu1
ProcVersionSignature: Ubuntu 3.16.0-33.44~14.04.1-generic 3.16.7-ckt7
Uname: Linux 3.16.0-33-generic i686
.tmp.unity.support.test.0:

ApportVersion: 2.14.1-0ubuntu3.8
Architecture: i386
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: Mon Apr 6 10:49:01 2015
DistUpgraded: Fresh install
DistroCodename: trusty
DistroVariant: ubuntu
GraphicsCard:
 Intel Corporation 82G33/G31 Express Integrated Graphics Controller [8086:29c2] (rev 10) (prog-if 00 [VGA controller])
   Subsystem: Biostar Microtech Int'l Corp Device [1565:3103]
InstallationDate: Installed on 2015-04-03 (3 days ago)
InstallationMedia: Ubuntu 14.04.2 LTS "Trusty Tahr" - Release i386 (20150218.1)
MachineType: BIOSTAR Group G31-M7 TE
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.16.0-33-generic root=UUID=f69e5f68-84a2-4ef4-8fc0-50503dced4a3 ro quiet splash vt.handoff=7
SourcePackage: unity
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 02/01/2010
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 080014
dmi.board.asset.tag: To Be Filled By O.E.M.
dmi.board.name: G31-M7 TE
dmi.board.vendor: BIOSTAR Group
dmi.chassis.asset.tag: None
dmi.chassis.type: 3
dmi.chassis.vendor: BIOSTAR Group
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr080014:bd02/01/2010:svnBIOSTARGroup:pnG31-M7TE:pvr:rvnBIOSTARGroup:rnG31-M7TE:rvr:cvnBIOSTARGroup:ct3:cvr:
dmi.product.name: G31-M7 TE
dmi.sys.vendor: BIOSTAR Group
version.compiz: compiz 1:0.9.11.3+14.04.20150122-0ubuntu1
version.libdrm2: libdrm2 2.4.56-1~ubuntu2
version.libgl1-mesa-dri: libgl1-mesa-dri N/A
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx N/A
version.xserver-xorg-core: xserver-xorg-core N/A
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev N/A
version.xserver-xorg-video-ati: xserver-xorg-video-ati N/A
version.xserver-xorg-video-intel: xserver-xorg-video-intel N/A
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau N/A
xserver.bootTime: Mon Apr 6 09:17:21 2015
xserver.configfile: default
xserver.devices:
 input Power Button KEYBOARD, id 6
 input Power Button KEYBOARD, id 7
 input USB USB Keykoard KEYBOARD, id 8
 input USB USB Keykoard KEYBOARD, id 9
 input ImPS/2 Generic Wheel Mouse MOUSE, id 10
xserver.errors:

xserver.logfile: /var/log/Xorg.0.log
xserver.outputs:
 product id 17570
 vendor GSM
xserver.version: 2:1.16.0-1ubuntu1.2~trusty2

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.