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[Bug 1378533] Re: [Lenovo ThinkPad T440s] Mouse lags when using external screen

To: kernel-packages@xxxxxxxxxxxxxxxxxxx
From: Landon Noll <ubuntu-bug-mail@xxxxxxxxx>
Date: Sun, 12 Oct 2014 07:59:27 -0000
Reply-to: Bug 1378533 <1378533@xxxxxxxxxxxxxxxxxx>
Sender: bounces@xxxxxxxxxxxxx

I am seeing a similar problem as Dan with Ubuntu 14.04 on a Parallels VM
under OS X 10.9.5.

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https://bugs.launchpad.net/bugs/1378533

Title:
  [Lenovo ThinkPad T440s] Mouse lags when using external screen

Status in “linux” package in Ubuntu:
  Incomplete

Bug description:
  Ubuntu 14.04 on ThinkPad T440s in clamshell mode using external
  monitor:

  The mouse periodically (not always) starts lagging dramatically. It's
  difficult to position it when this happens, as I'll move the mouse and
  the pointer will react a later, sometimes a long as a second, and with
  little precision. Virtually unusable when it gets this way.

  I've checked system monitor for runaway processes, and nothing is
  hogging the CPU.

  The mouse is a Microsoft wireless (optical). This also occurred with a Logitech wireless mouse.
  --- 
  ApportVersion: 2.14.1-0ubuntu3.5
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC2:  dan        2851 F.... pulseaudio
   /dev/snd/controlC1:  dan        2851 F.... pulseaudio
   /dev/snd/controlC0:  dan        2851 F.... pulseaudio
  CurrentDesktop: Unity
  DistroRelease: Ubuntu 14.04
  HibernationDevice: RESUME=UUID=ce662c44-024f-4a63-86e9-7d90e45f6c50
  InstallationDate: Installed on 2014-07-08 (91 days ago)
  InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140417)
  MachineType: LENOVO 20AQCTO1WW
  Package: linux (not installed)
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.13.0-36-generic root=/dev/mapper/ubuntu--vg-root ro quiet splash vt.handoff=7
  ProcVersionSignature: Ubuntu 3.13.0-36.63-generic 3.13.11.6
  RelatedPackageVersions:
   linux-restricted-modules-3.13.0-36-generic N/A
   linux-backports-modules-3.13.0-36-generic  N/A
   linux-firmware                             1.127.7
  Tags:  trusty
  Uname: Linux 3.13.0-36-generic x86_64
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo
  _MarkForUpload: True
  dmi.bios.date: 09/03/2014
  dmi.bios.vendor: LENOVO
  dmi.bios.version: GJET79WW (2.29 )
  dmi.board.asset.tag: Not Available
  dmi.board.name: 20AQCTO1WW
  dmi.board.vendor: LENOVO
  dmi.board.version: SDK0E50510 PRO
  dmi.chassis.asset.tag: No Asset Information
  dmi.chassis.type: 10
  dmi.chassis.vendor: LENOVO
  dmi.chassis.version: Not Available
  dmi.modalias: dmi:bvnLENOVO:bvrGJET79WW(2.29):bd09/03/2014:svnLENOVO:pn20AQCTO1WW:pvrThinkPadT440s:rvnLENOVO:rn20AQCTO1WW:rvrSDK0E50510PRO:cvnLENOVO:ct10:cvrNotAvailable:
  dmi.product.name: 20AQCTO1WW
  dmi.product.version: ThinkPad T440s
  dmi.sys.vendor: LENOVO

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