Public bug reported:

I am experiencing cpu usage spikes with xorg where everything will lag
for about a second.  Seems to happen every minute or few.

Other possibly related symptoms:
  Seeing flickering of the mouse pointer when it's over certain interactive 
fields or just at the top of my laptop monitor.
  Experiencing screen tearing in a diagonal line across second monitor
  When I set up the second monitor, backgrounds fail to display.  Changing 
background fixes.
  Sometimes the second monitor just starts flicking off and on.

Setup:
Just upgraded from 16.04 to 16.10 (didn't see any of this on previous version)
Using a second monitor connected via display port
USB mouse and keyboard connected.

ProblemType: Bug
DistroRelease: Ubuntu 16.10
Package: xorg 1:7.7+13ubuntu4
ProcVersionSignature: Ubuntu 4.8.0-22.24-generic 4.8.0
Uname: Linux 4.8.0-22-generic x86_64
.tmp.unity_support_test.0:
 
ApportVersion: 2.20.3-0ubuntu8
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: Tue Oct 18 20:09:40 2016
DistUpgraded: 2016-10-15 18:08:14,205 ERROR got error from PostInstallScript 
./xorg_fix_proprietary.py (g-exec-error-quark: Failed to execute child process 
"./xorg_fix_proprietary.py" (No such file or directory) (8))
DistroCodename: yakkety
DistroVariant: ubuntu
DkmsStatus:
 bbswitch, 0.8, 4.4.0-43-generic, x86_64: installed
 bbswitch, 0.8, 4.8.0-22-generic, x86_64: installed
EcryptfsInUse: Yes
ExtraDebuggingInterest: Yes
GraphicsCard:
 Intel Corporation 4th Gen Core Processor Integrated Graphics Controller 
[8086:0416] (rev 06) (prog-if 00 [VGA controller])
   Subsystem: Hewlett-Packard Company 4th Gen Core Processor Integrated 
Graphics Controller [103c:1909]
 NVIDIA Corporation GK208GLM [Quadro K610M] [10de:12b9] (rev a1) (prog-if 00 
[VGA controller])
   Subsystem: Hewlett-Packard Company GK208GLM [Quadro K610M] [103c:1909]
InstallationDate: Installed on 2016-07-26 (84 days ago)
InstallationMedia: Ubuntu 16.04.1 LTS "Xenial Xerus" - Release amd64 (20160719)
LightdmDisplayLog: resize called 2560 1440
MachineType: Hewlett-Packard HP ZBook 15
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.8.0-22-generic.efi.signed 
root=/dev/mapper/ubuntu--vg-root ro apparmor=1 security=apparmor quiet splash 
vt.handoff=7
SourcePackage: xorg
UpgradeStatus: Upgraded to yakkety on 2016-10-15 (3 days ago)
dmi.bios.date: 10/28/2015
dmi.bios.vendor: Hewlett-Packard
dmi.bios.version: L70 Ver. 01.34
dmi.board.name: 1909
dmi.board.vendor: Hewlett-Packard
dmi.board.version: KBC Version 94.55
dmi.chassis.type: 10
dmi.chassis.vendor: Hewlett-Packard
dmi.modalias: 
dmi:bvnHewlett-Packard:bvrL70Ver.01.34:bd10/28/2015:svnHewlett-Packard:pnHPZBook15:pvrA3009CD10002:rvnHewlett-Packard:rn1909:rvrKBCVersion94.55:cvnHewlett-Packard:ct10:cvr:
dmi.product.name: HP ZBook 15
dmi.product.version: A3009CD10002
dmi.sys.vendor: Hewlett-Packard
version.compiz: compiz 1:0.9.13.0+16.10.20160818.2-0ubuntu2
version.ia32-libs: ia32-libs N/A
version.libdrm2: libdrm2 2.4.70-1
version.libgl1-mesa-dri: libgl1-mesa-dri 12.0.3-1ubuntu2
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 12.0.3-1ubuntu2
version.xserver-xorg-core: xserver-xorg-core 2:1.18.4-1ubuntu6
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.10.2-1ubuntu1
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.7.1-1
version.xserver-xorg-video-intel: xserver-xorg-video-intel N/A
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.12-2
xserver.bootTime: Tue Oct 18 14:59:35 2016
xserver.configfile: default
xserver.errors:
 Failed to load module "nvidia" (module does not exist, 0)
 Failed to load module "nvidia" (module does not exist, 0)
 NOUVEAU(G0): [XvMC] Failed to initialize extension.
xserver.logfile: /var/log/Xorg.0.log
xserver.version: 2:1.18.4-1ubuntu6
xserver.video_driver: modeset

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


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

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You received this bug notification because you are a member of Ubuntu-X,
which is subscribed to xorg in Ubuntu.
https://bugs.launchpad.net/bugs/1634614

Title:
  CPU usage spikes and mouse flicker

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