As requested I downloaded the latest build and ran it from USB.  After
selecting hybrid graphics in BIOS I booted up and was delighted to see
no mouse trails on the 2nd monitor!

I then rebooted back into 16.04 leaving hybrid graphics selected - no
mouse trails!

I think there was an Intel firmware update a week or two ago that I got
on Windows, maybe it updated the Intel graphics firmware?  Whatever
happened I am happy to say that I cannot now duplicate the problem and
hybrid graphics seems to be working properly in both 16.04 and 17.10.

Thanks for your help.

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You received this bug notification because you are a member of Ubuntu
Touch seeded packages, which is subscribed to xorg in Ubuntu.
https://bugs.launchpad.net/bugs/1664397

Title:
  Mouse trails and distorted cursor on 2nd monitor

Status in xorg package in Ubuntu:
  Incomplete

Bug description:
  Lenovo Thinkpad P50, Xeon, Nvidia M2000m 4GB, 16 GB RAM

  2nd monitor (ASUS) connected via either DP or HDMI, when using Hybrid
  Graphics the cursor on the second display is distorted and leaves
  mouse trails that persist for several seconds.  Switching to Nvidia
  graphics cures but Nvidia has other problems (built in display is dim
  and brightness cannot be adjusted).  Interestingly, just opening
  Display settings also cures the problem for as long as the Display
  Setting dialog is open.  Under Windows (10 Pro) Hybrid Graphics does
  not exhibit this problem.

  Ubuntu release is 16.04.2 LTS.

  ProblemType: Bug
  DistroRelease: Ubuntu 16.04
  Package: xorg 1:7.7+13ubuntu3
  Uname: Linux 4.9.0-040900-generic x86_64
  .tmp.unity_support_test.0:
   
  ApportVersion: 2.20.1-0ubuntu2.5
  Architecture: amd64
  BootLog: /dev/nvme0n1p2: clean, 297436/7282688 files, 2849132/29101568 blocks
  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: Mon Feb 13 18:15:25 2017
  DistUpgraded: Fresh install
  DistroCodename: xenial
  DistroVariant: ubuntu
  DkmsStatus:
   bbswitch, 0.8, 4.4.0-62-generic, x86_64: installed
   bbswitch, 0.8, 4.9.0-040900-generic, x86_64: installed
  EcryptfsInUse: Yes
  GraphicsCard:
   NVIDIA Corporation GM107GLM [Quadro M2000M] [10de:13b0] (rev a2) (prog-if 00 
[VGA controller])
     Subsystem: Lenovo GM107GLM [Quadro M2000M] [17aa:2230]
  InstallationDate: Installed on 2017-01-07 (37 days ago)
  InstallationMedia: Ubuntu 16.04.1 LTS "Xenial Xerus" - Release amd64 
(20160719)
  MachineType: LENOVO 20EN001SUS
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.9.0-040900-generic 
root=UUID=81b27291-6609-488b-8477-b2eb41ab17f2 ro quiet splash vt.handoff=7
  SourcePackage: xorg
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 12/08/2016
  dmi.bios.vendor: LENOVO
  dmi.bios.version: N1EET64W (1.37 )
  dmi.board.asset.tag: Not Available
  dmi.board.name: 20EN001SUS
  dmi.board.vendor: LENOVO
  dmi.board.version: SDK0J40705 WIN
  dmi.chassis.asset.tag: No Asset Information
  dmi.chassis.type: 10
  dmi.chassis.vendor: LENOVO
  dmi.chassis.version: None
  dmi.modalias: 
dmi:bvnLENOVO:bvrN1EET64W(1.37):bd12/08/2016:svnLENOVO:pn20EN001SUS:pvrThinkPadP50:rvnLENOVO:rn20EN001SUS:rvrSDK0J40705WIN:cvnLENOVO:ct10:cvrNone:
  dmi.product.name: 20EN001SUS
  dmi.product.version: ThinkPad P50
  dmi.sys.vendor: LENOVO
  version.compiz: compiz 1:0.9.12.2+16.04.20160823-0ubuntu1
  version.ia32-libs: ia32-libs N/A
  version.libdrm2: libdrm2 2.4.70-1~ubuntu16.04.1
  version.libgl1-mesa-dri: libgl1-mesa-dri 12.0.6-0ubuntu0.16.04.1
  version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
  version.libgl1-mesa-glx: libgl1-mesa-glx 12.0.6-0ubuntu0.16.04.1
  version.xserver-xorg-core: xserver-xorg-core 2:1.18.4-0ubuntu0.2
  version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.10.1-1ubuntu2
  version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.7.0-1
  version.xserver-xorg-video-intel: xserver-xorg-video-intel 
2:2.99.917+git20160325-1ubuntu1.2
  version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 
1:1.0.12-1build2
  xserver.bootTime: Mon Feb 13 18:15:02 2017
  xserver.configfile: default
  xserver.logfile: /var/log/Xorg.0.log
  xserver.version: 2:1.18.4-0ubuntu0.2
  xserver.video_driver: modeset

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