Frank, thank you for reporting this and helping make Ubuntu better.

In order to allow additional upstream developers to examine the issue, at your 
earliest convenience, could you please test the latest upstream kernel 
available from http://kernel.ubuntu.com/~kernel-ppa/mainline/?C=N;O=D ? Please 
keep in mind the following:
1) The one to test is at the very top line at the top of the page (not the 
daily folder).
2) The release names are irrelevant.
3) The folder time stamps aren't indicative of when the kernel actually was 
released upstream.
4) Install instructions are available at 
https://wiki.ubuntu.com/Kernel/MainlineBuilds .

If testing on your main install would be inconvenient, one may:
1) Install Ubuntu to a different partition and then test this there.
2) Backup, or clone the primary install.

If the latest kernel did not allow you to test to the issue (ex. you couldn't 
boot into the OS) please make a comment in your report about this, and continue 
to test the next most recent kernel version until you can test to the issue. 
Once you've tested the upstream kernel, please comment on which kernel version 
specifically you tested. If this issue is fixed in the mainline kernel, please 
add the following tags by clicking on the yellow circle with a black pencil 
icon, next to the word Tags, located at the bottom of the report description:
kernel-fixed-upstream
kernel-fixed-upstream-X.Y-rcZ

Where X, and Y are the first two numbers of the kernel version, and Z is
the release candidate number if it exists.

If the mainline kernel does not fix the issue, please add the following tags:
kernel-bug-exists-upstream
kernel-bug-exists-upstream-X.Y-rcZ

Please note, an error to install the kernel does not fit the criteria of
kernel-bug-exists-upstream.

Also, you don't need to apport-collect further unless specifically
requested to do so.

It is most helpful that after testing of the latest upstream kernel is
complete, you mark this report Status Confirmed.

Lastly, to keep this issue relevant to upstream, please continue to test
the latest mainline kernel as it becomes available.

Thank you for your help.

** Tags added: bios-outdated-1.21 regression-update

** Changed in: linux (Ubuntu)
   Importance: Undecided => Low

** Changed in: linux (Ubuntu)
       Status: Confirmed => Incomplete

-- 
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/1651830

Title:
  Intel HD Graphics 520 lagging after kernel upgrade

Status in linux package in Ubuntu:
  Incomplete

Bug description:
  After upgrading to kernel version 4.4.0-53 on a clean install of
  Lubuntu, I have experienced a persistent problem where the desktop
  graphics (or any graphics when not using tty 1 to 6) appear to lag or
  freeze every 1 to 2 seconds for between 0.5 to 1 second.  During the
  freezes, no mouse input is recorded, and most keyboard input is lost.

  I'm fairly sure this is a kernel issue, as booting with kernel
  4.4.0-31 fixes the issue.  This problem is also present in 4.4.0-57.

  I am using a Lenovo ThinkPad X1 Carbon with integrated Intel graphics,
  which aren't the most powerful (they couldn't handle Unity, hence
  Lubunut).  I am running Lubuntu 16.04 LTS, though I have tried a clean
  install (from the .iso) of Lubuntu 16.10, and this but still appears.
  The laptop has a4 core i5-6200U processor (2.3 GHz), 8 Gigs of RAM,
  and Intel HD Graphics 520 (Skylake)

  This does not appear to be a thermal issue, or a processor speed issue
  (the problem persists weather speed step is enabled in the bios or
  not), though my testing with processor speed step and kernel
  performance settings (performance/power save) was at best amateur.

  ProblemType: Bug
  DistroRelease: Ubuntu 16.04
  Package: linux-image-4.4.0-57-generic 4.4.0-57.78
  ProcVersionSignature: Ubuntu 4.4.0-57.78-generic 4.4.35
  Uname: Linux 4.4.0-57-generic x86_64
  ApportVersion: 2.20.1-0ubuntu2.4
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  david      1078 F.... pulseaudio
  CurrentDesktop: LXDE
  Date: Wed Dec 21 18:21:04 2016
  HibernationDevice: RESUME=UUID=046bb03a-34db-4896-b109-e950967a9fae
  InstallationDate: Installed on 2016-12-14 (7 days ago)
  InstallationMedia: Lubuntu 16.04.1 LTS "Xenial Xerus" - Release amd64 
(20160720)
  MachineType: LENOVO 20FBCTO1WW
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.4.0-57-generic.efi.signed 
root=UUID=f802d856-3841-4231-8eb4-80def322e540 ro quiet splash vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-4.4.0-57-generic N/A
   linux-backports-modules-4.4.0-57-generic  N/A
   linux-firmware                            1.157.6
  SourcePackage: linux
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 08/02/2016
  dmi.bios.vendor: LENOVO
  dmi.bios.version: N1FET43W (1.17 )
  dmi.board.asset.tag: Not Available
  dmi.board.name: 20FBCTO1WW
  dmi.board.vendor: LENOVO
  dmi.board.version: SDK0J40709 WIN
  dmi.chassis.asset.tag: No Asset Information
  dmi.chassis.type: 10
  dmi.chassis.vendor: LENOVO
  dmi.chassis.version: None
  dmi.modalias: 
dmi:bvnLENOVO:bvrN1FET43W(1.17):bd08/02/2016:svnLENOVO:pn20FBCTO1WW:pvrThinkPadX1Carbon4th:rvnLENOVO:rn20FBCTO1WW:rvrSDK0J40709WIN:cvnLENOVO:ct10:cvrNone:
  dmi.product.name: 20FBCTO1WW
  dmi.product.version: ThinkPad X1 Carbon 4th
  dmi.sys.vendor: LENOVO

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