Public bug reported:

While using my machine, characters suddenly disappear. No character in
particular, not in any single application in particular, and copying and
pasting the text preserves the characters.

Scrolling the text out of view and back into view doesn't affect the
missing characters. Switching between applications may change the
affected characters (possibly due to a redraw operation?)

Restarting often solves the problem, but it comes back after a couple of
hours working. I've attached a screenshot to show you the problem.

I do believe this is different than the bug relating to garbled characters in a 
number of ways
1. I don't ever get garbled characters
2. Scrolling out/in of the affected text doesn't re-show the missing 
characters, even navigating inside the application has no effect. 3. It's 
global, I can even see it on Desktop icon names

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: xserver-xorg-video-intel 2:2.99.910-0ubuntu1
ProcVersionSignature: Ubuntu 3.13.0-30.55-generic 3.13.11.2
Uname: Linux 3.13.0-30-generic x86_64
.tmp.unity.support.test.0:
 
ApportVersion: 2.14.1-0ubuntu3.2
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: Wed Jul 16 14:48:25 2014
DistUpgraded: 2014-06-29 16:38:35,552 DEBUG enabling apt cron job
DistroCodename: trusty
DistroVariant: ubuntu
DkmsStatus:
 virtualbox, 4.3.10, 3.11.0-24-generic, x86_64: installed
 virtualbox, 4.3.10, 3.13.0-30-generic, x86_64: installed
ExtraDebuggingInterest: Yes
GraphicsCard:
 Intel Corporation Core Processor Integrated Graphics Controller [8086:0046] 
(rev 02) (prog-if 00 [VGA controller])
   Subsystem: LG Electronics, Inc. Device [1854:0803]
InstallationDate: Installed on 2014-03-28 (109 days ago)
InstallationMedia: Ubuntu 13.10 "Saucy Salamander" - Release amd64 (20131016.1)
MachineType: LG Electronics R590-G.ARIBE8
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-30-generic 
root=UUID=79c2f2b5-87cb-44d0-83fa-d99e73bb0a73 ro quiet splash vt.handoff=7
SourcePackage: xserver-xorg-video-intel
UpgradeStatus: Upgraded to trusty on 2014-06-29 (16 days ago)
dmi.bios.date: 01/06/2010
dmi.bios.vendor: INSYDE
dmi.bios.version: QL4L3I51
dmi.board.asset.tag: Base Board Asset Tag
dmi.board.name: Base Board Product Name
dmi.board.vendor: Intel Corp.
dmi.board.version: Base Board Version
dmi.chassis.asset.tag: Chassis Asset Tag
dmi.chassis.type: 1
dmi.chassis.vendor: Chassis Manufacturer
dmi.chassis.version: Chassis Version
dmi.modalias: 
dmi:bvnINSYDE:bvrQL4L3I51:bd01/06/2010:svnLGElectronics:pnR590-G.ARIBE8:pvr05:rvnIntelCorp.:rnBaseBoardProductName:rvrBaseBoardVersion:cvnChassisManufacturer:ct1:cvrChassisVersion:
dmi.product.name: R590-G.ARIBE8
dmi.product.version: 05
dmi.sys.vendor: LG Electronics
version.compiz: compiz 1:0.9.11.1+14.04.20140701-0ubuntu1
version.ia32-libs: ia32-libs N/A
version.libdrm2: libdrm2 2.4.52-1
version.libgl1-mesa-dri: libgl1-mesa-dri 10.1.3-0ubuntu0.1
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 10.1.3-0ubuntu0.1
version.xserver-xorg-core: xserver-xorg-core 2:1.15.1-0ubuntu2
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.8.2-1ubuntu2
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.3.0-1ubuntu3.1
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: Wed Jul 16 01:52:06 2014
xserver.configfile: default
xserver.errors:
 
xserver.logfile: /var/log/Xorg.0.log
xserver.outputs:
 product id                                 560 
 vendor                                     LGD
xserver.version: 2:1.15.1-0ubuntu2

** Affects: xserver-xorg-video-intel (Ubuntu)
     Importance: Undecided
         Status: New


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

** Attachment added: "Screenshot from 2014-07-16 14:39:42.png"
   
https://bugs.launchpad.net/bugs/1342675/+attachment/4153878/+files/Screenshot%20from%202014-07-16%2014%3A39%3A42.png

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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/1342675

Title:
  Random characters in screen text suddenly disappear

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