Public bug reported:

Since upgrading to yakkety on this machine I see frequent instances of
the screen "scrambling," for lack of a better work. What I mean is that
for a split second things appear at the wrong location on the screeen,
as though the video has lost sync temporarily. Then it returns to
normal. It happens frequently but not on a regular interval - I'd
estimate anywhere between 5 and 30 seconds between occurrences in

I'm running a 4.8 kernel from the canonical-kernel-team ppa right now,
but I don't think this is a kernel problem, or at least not wholly a
kernel problem, because it also happens with 4.4 kernels (though it
seems less frequent with 4.4). This didn't happen at all with xenial.

ProblemType: Bug
DistroRelease: Ubuntu 16.10
Package: xserver-xorg-video-intel 2:2.99.917+git20160706-1ubuntu1
ProcVersionSignature: Ubuntu 4.8.0-11.12-generic 4.8.0-rc6
Uname: Linux 4.8.0-11-generic x86_64
ApportVersion: 2.20.3-0ubuntu7
Architecture: amd64
BootLog: /dev/sda7: clean, 1090327/10641408 files, 32820447/42537216 blocks
CompizPlugins: No value set for 
CompositorRunning: compiz
CompositorUnredirectDriverBlacklist: '(nouveau|Intel).*Mesa 8.0'
CompositorUnredirectFSW: true
CurrentDesktop: Unity
Date: Mon Sep 19 07:08:24 2016
DistUpgraded: 2016-01-08 11:10:55,368 DEBUG enabling apt cron job
DistroCodename: yakkety
DistroVariant: ubuntu
EcryptfsInUse: Yes
ExtraDebuggingInterest: Yes, including running git bisection searches
 Intel Corporation HD Graphics 5500 [8086:1616] (rev 09) (prog-if 00 [VGA 
   Subsystem: Dell HD Graphics 5500 [1028:0665]
InstallationDate: Installed on 2015-02-19 (577 days ago)
InstallationMedia: Ubuntu 15.04 "Vivid Vervet" - Alpha amd64 (20150110)
MachineType: Dell Inc. XPS 13 9343
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.8.0-11-generic 
root=UUID=bdad03f3-06c0-439d-8869-32fad0b1851b ro quiet splash vt.handoff=7
SourcePackage: xserver-xorg-video-intel
UpgradeStatus: Upgraded to yakkety on 2016-01-08 (254 days ago) 05/15/2015
dmi.bios.vendor: Dell Inc.
dmi.bios.version: A04 0TM99H
dmi.board.vendor: Dell Inc.
dmi.board.version: A00
dmi.chassis.type: 9
dmi.chassis.vendor: Dell Inc.
dmi:bvnDellInc.:bvrA04:bd05/15/2015:svnDellInc.:pnXPS139343:pvr01:rvnDellInc.:rn0TM99H:rvrA00:cvnDellInc.:ct9:cvr: XPS 13 9343
dmi.product.version: 01
dmi.sys.vendor: Dell Inc.
version.compiz: compiz 1:
version.ia32-libs: ia32-libs N/A
version.libdrm2: libdrm2 2.4.70-1
version.libgl1-mesa-dri: libgl1-mesa-dri 12.0.3-1ubuntu1
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 12.0.3-1ubuntu1
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 1:7.7.0-1
version.xserver-xorg-video-intel: xserver-xorg-video-intel 
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.12-2

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

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

** Summary changed:

- [Dell XPS 9343] Sceen periodically scrambles then returns to normal
+ [Dell XPS 13 9343] Sceen periodically scrambles then returns to normal

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  [Dell XPS 13 9343] Sceen periodically scrambles then returns to normal

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