*** This bug is a duplicate of bug 1098334 ***
    https://bugs.launchpad.net/bugs/1098334

Public bug reported:

This happens since upgrading to 13.10. With 13.04 I did not have this
problem.

I notice glitches in the text rendering (randomly, one character in many
will be rendered as noise). This happens in all applications (xterm,
Mozilla, etc). Other that that I observe no crashes or problems.

Attached is a snapshot that shows the problem.

ProblemType: Bug
DistroRelease: Ubuntu 13.10
Package: xserver-xorg-core 2:1.14.3-3ubuntu2
ProcVersionSignature: Ubuntu 3.11.0-12.19-generic 3.11.3
Uname: Linux 3.11.0-12-generic x86_64
NonfreeKernelModules: wl
.tmp.unity.support.test.0:
 
ApportVersion: 2.12.5-0ubuntu2
Architecture: amd64
CompizPlugins: 
[core,composite,opengl,decor,snap,gnomecompat,compiztoolbox,resize,move,mousepoll,grid,imgpng,vpswitch,place,regex,animation,workarounds,unitymtgrabhandles,wall,expo,ezoom,fade,session,scale,unityshell]
CompositorRunning: compiz
CompositorUnredirectDriverBlacklist: '(nouveau|Intel).*Mesa 8.0'
CompositorUnredirectFSW: true
Date: Wed Oct 23 16:22:59 2013
DistUpgraded: 2013-10-21 11:57:38,259 DEBUG enabling apt cron job
DistroCodename: saucy
DistroVariant: ubuntu
DkmsStatus:
 bcmwl, 6.30.223.141+bdcom, 3.11.0-12-generic, x86_64: installed
 bcmwl, 6.30.223.141+bdcom, 3.8.0-31-generic, x86_64: installed
 virtualbox, 4.2.16, 3.11.0-12-generic, x86_64: installed
 virtualbox, 4.2.16, 3.8.0-31-generic, x86_64: installed
GraphicsCard:
 Intel Corporation Mobile 4 Series Chipset Integrated Graphics Controller 
[8086:2a42] (rev 07) (prog-if 00 [VGA controller])
   Subsystem: Dell Device [1028:02bc]
   Subsystem: Dell Device [1028:02bc]
InstallationDate: Installed on 2013-05-20 (156 days ago)
InstallationMedia: Ubuntu 13.04 "Raring Ringtail" - Release amd64 (20130424)
MachineType: Dell Inc. Vostro 1520
MarkForUpload: True
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.11.0-12-generic 
root=UUID=5326adab-e228-4770-90ca-3c0261353884 ro quiet splash vt.handoff=7
SourcePackage: xorg-server
UpgradeStatus: Upgraded to saucy on 2013-10-21 (2 days ago)
dmi.bios.date: 10/27/2009
dmi.bios.vendor: Dell Inc.
dmi.bios.version: A05
dmi.board.name: 0T816J
dmi.board.vendor: Dell Inc.
dmi.chassis.type: 8
dmi.chassis.vendor: Dell Inc.
dmi.chassis.version: N/A
dmi.modalias: 
dmi:bvnDellInc.:bvrA05:bd10/27/2009:svnDellInc.:pnVostro1520:pvrNull:rvnDellInc.:rn0T816J:rvr:cvnDellInc.:ct8:cvrN/A:
dmi.product.name: Vostro 1520
dmi.product.version: Null
dmi.sys.vendor: Dell Inc.
version.compiz: compiz 1:0.9.10+13.10.20131011-0ubuntu1
version.ia32-libs: ia32-libs N/A
version.libdrm2: libdrm2 2.4.46-1
version.libgl1-mesa-dri: libgl1-mesa-dri 9.2.1-1ubuntu3
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 9.2.1-1ubuntu3
version.xserver-xorg-core: xserver-xorg-core 2:1.14.3-3ubuntu2
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.7.3-0ubuntu3.1
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.2.0-0ubuntu10
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.904-0ubuntu2
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.9-2ubuntu1
xserver.bootTime: Tue Oct 22 10:31:47 2013
xserver.configfile: default
xserver.errors:
 
xserver.logfile: /var/log/Xorg.0.log
xserver.outputs:
 product id                                9079 
 vendor                                     AUO
xserver.version: 2:1.14.3-3ubuntu2

** Affects: xorg-server (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug compiz-0.9 saucy ubuntu

** Attachment added: "Snapshot of glitch"
   
https://bugs.launchpad.net/bugs/1243735/+attachment/3888674/+files/glitch_2.png

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which is subscribed to xorg-server in Ubuntu.
https://bugs.launchpad.net/bugs/1243735

Title:
  Glitches in text rendering

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