Public bug reported:

The symptom is always the same: the cursor starts to move choppily, soon
it stops moving at all, keyboard input is ignored although
Ctrl+Alt+PrtSc+REISUB works and is the only option remaining.

It doesn't seem to be connected to running any particular application.
The only common attribute is that it always occur during higher RAM load
= over 50% (on a 2GB RAM system). I've tested, re-tested and tested
again RAM in Memtest for >6h periods and no error was ever reported so
in my opinion the hardware issue of the RAM can be ruled out.

NOTE: This is an incredibly frustrating problem as it affects system
stability/usability.

ProblemType: Bug
DistroRelease: Ubuntu 13.10
Package: xorg 1:7.7+1ubuntu6
ProcVersionSignature: Ubuntu 3.11.0-17.31-generic 3.11.10.3
Uname: Linux 3.11.0-17-generic x86_64
.tmp.unity.support.test.0:
 
ApportVersion: 2.12.5-0ubuntu2.2
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
Date: Thu Feb 27 16:46:52 2014
DistUpgraded: Fresh install
DistroCodename: saucy
DistroVariant: ubuntu
ExtraDebuggingInterest: Yes
GraphicsCard:
 Intel Corporation 3rd Gen Core processor Graphics Controller [8086:0156] (rev 
09) (prog-if 00 [VGA controller])
   Subsystem: Lenovo Device [17aa:366b]
InstallationDate: Installed on 2014-01-03 (55 days ago)
InstallationMedia: It
MachineType: LENOVO 10115
MarkForUpload: True
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.11.0-17-generic 
root=UUID=38a215c9-0e4f-4726-9b3b-3f749f762783 ro quiet splash vt.handoff=7
SourcePackage: xorg
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 01/18/2013
dmi.bios.vendor: LENOVO
dmi.bios.version: EZKT16AUS
dmi.board.name: INVALID
dmi.board.vendor: LENOVO
dmi.board.version: No DPK
dmi.chassis.type: 3
dmi.chassis.vendor: LENOVO
dmi.chassis.version: Chassis Version
dmi.modalias: 
dmi:bvnLENOVO:bvrEZKT16AUS:bd01/18/2013:svnLENOVO:pn10115:pvrIdeaCenterQ190:rvnLENOVO:rnINVALID:rvrNoDPK:cvnLENOVO:ct3:cvrChassisVersion:
dmi.product.name: 10115
dmi.product.version: IdeaCenter Q190
dmi.sys.vendor: LENOVO
version.compiz: compiz 1:0.9.10+13.10.20131011-0ubuntu1
version.ia32-libs: ia32-libs N/A
version.libdrm2: libdrm2 2.4.46-1ubuntu1
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 2:1.14.5-1ubuntu2~saucy1
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 2:2.99.904-0ubuntu2.1
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.9-2ubuntu1
xserver.bootTime: Thu Feb 27 16:27:06 2014
xserver.configfile: default
xserver.errors:
 
xserver.logfile: /var/log/Xorg.0.log
xserver.outputs:
 product id                               22052 
 vendor                                     IVM
xserver.version: 2:1.14.5-1ubuntu2~saucy1

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


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

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https://bugs.launchpad.net/bugs/1285752

Title:
  X freezes with EQ overflowing error in the log

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