As notified on on IRC, that is a good kernel.

The issue is easy to reproduce on an X1 Carbon just run `stress -c 4`
and within a few seconds mouse starts to lag and everything becomes
slow.

** Description changed:

  My X1Carbon becomes quite laggy, the cursor hangs for a few seconds and
  then resumes while my system is compiling some code, or lets says
  PyCharm is indexing things or Android Studio is compiling some code. I
  was using 4.4 on Xenial a few days ago and everything was working just
  fine. Installed Yakkety and this issue happens.
+ 
+ TEST CASE:
+ `stress -c 4` <-- that results in system slowness.
+ 
  
  I will downgrade the kernel and see if that mitigates the issue.
  
  ProblemType: Bug
  DistroRelease: Ubuntu 16.10
  Package: linux-image-4.8.0-15-generic 4.8.0-15.16
  ProcVersionSignature: Ubuntu 4.8.0-15.16-generic 4.8.0-rc7
  Uname: Linux 4.8.0-15-generic x86_64
  ApportVersion: 2.20.3-0ubuntu7
  Architecture: amd64
  AudioDevicesInUse:
-  USER        PID ACCESS COMMAND
-  /dev/snd/pcmC1D0p:   om26er     3390 F...m pulseaudio
-  /dev/snd/controlC1:  om26er     3390 F.... pulseaudio
-  /dev/snd/controlC0:  om26er     3390 F.... pulseaudio
+  USER        PID ACCESS COMMAND
+  /dev/snd/pcmC1D0p:   om26er     3390 F...m pulseaudio
+  /dev/snd/controlC1:  om26er     3390 F.... pulseaudio
+  /dev/snd/controlC0:  om26er     3390 F.... pulseaudio
  CurrentDesktop: Unity
  Date: Fri Sep 23 21:40:34 2016
  HibernationDevice: RESUME=UUID=a92c85ab-cca3-4afc-abf1-3516f193129e
  InstallationDate: Installed on 2016-09-21 (1 days ago)
  InstallationMedia: Ubuntu 16.10 "Yakkety Yak" - Alpha amd64 (20160921)
  MachineType: LENOVO 20BSCTO1WW
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.8.0-15-generic.efi.signed 
root=UUID=01b0a4a0-d791-46e8-a212-1f769cff3a4b ro quiet splash vt.handoff=7
  RelatedPackageVersions:
-  linux-restricted-modules-4.8.0-15-generic N/A
-  linux-backports-modules-4.8.0-15-generic  N/A
-  linux-firmware                            1.161
+  linux-restricted-modules-4.8.0-15-generic N/A
+  linux-backports-modules-4.8.0-15-generic  N/A
+  linux-firmware                            1.161
  SourcePackage: linux
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 08/13/2015
  dmi.bios.vendor: LENOVO
  dmi.bios.version: N14ET32W (1.10 )
  dmi.board.asset.tag: Not Available
  dmi.board.name: 20BSCTO1WW
  dmi.board.vendor: LENOVO
  dmi.board.version: SDK0E50510 WIN
  dmi.chassis.asset.tag: No Asset Information
  dmi.chassis.type: 10
  dmi.chassis.vendor: LENOVO
  dmi.chassis.version: None
  dmi.modalias: 
dmi:bvnLENOVO:bvrN14ET32W(1.10):bd08/13/2015:svnLENOVO:pn20BSCTO1WW:pvrThinkPadX1Carbon3rd:rvnLENOVO:rn20BSCTO1WW:rvrSDK0E50510WIN:cvnLENOVO:ct10:cvrNone:
  dmi.product.name: 20BSCTO1WW
  dmi.product.version: ThinkPad X1 Carbon 3rd
  dmi.sys.vendor: LENOVO

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https://bugs.launchpad.net/bugs/1627108

Title:
  X1Carbon comes to a crawl during high CPU usage tasks

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