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


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  Mouse lags when using external screen

Status in “linux” package in Ubuntu:

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

  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
   /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
   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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