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[Troy Jacobson <troy@xxxxxxxxxxxx>]

apport information

** Attachment added: "ProcInterrupts.txt"
   https://bugs.launchpad.net/bugs/1494092/+attachment/4460196/+files/ProcInterrupts.txt

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https://bugs.launchpad.net/bugs/1494092

Title:
  After docking/undocking, tooltips cause the UI to become briefly
  unresponsive

Status in linux package in Ubuntu:
  Confirmed

Bug description:
  I have a Thinkpad T520 which I use frequently both undocked and docked
  with dual monitors.  It all works fine when it is first powered on in
  either configuration, as well as when it awakes from sleep.  However,
  once I switch to the opposite configuration from the initial power-up,
  I experience brief moments of unresponsiveness.  I switch between
  configurations by entering suspend (sleep),  either docking or
  undocking the laptop, and then returning from suspend mode.

  The unresponsiveness is most often triggered by tooltips appearing in
  any program, and the system remains unresponsive until the tooltip
  disappears.  The behavior may occur for other types of windows or UI
  components, but I can't say for certain.  When I'm experiencing this
  issue, the mouse moves and most screen updates still happen (It will
  cause most video playback to pause, however).  However, mouse clicks
  and typing are ignored or queued up.

  I'm using Ubuntu 15.04, with the nvidia-355 binary driver.  I've used other versions of the nvidia driver, and they have all exhibited this behavior or had other issues.  I don't recall having this issue with 14.10, but I can't confirm it.
  --- 
  ApportVersion: 2.17.2-0ubuntu1.3
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC1:  troy       3291 F.... pulseaudio
   /dev/snd/controlC0:  troy       3291 F.... pulseaudio
  CurrentDesktop: GNOME
  DistroRelease: Ubuntu 15.04
  HibernationDevice: RESUME=UUID=ae9c899d-aaf8-42e8-9165-ffc08269576c
  InstallationDate: Installed on 2015-03-26 (168 days ago)
  InstallationMedia: Ubuntu-GNOME 14.10 "Utopic Unicorn" - Release amd64 (20141022.1)
  MachineType: LENOVO 4239CTO
  NonfreeKernelModules: nvidia
  Package: linux (not installed)
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.19.0-28-generic root=UUID=6113f906-aaea-4e54-abf5-3722066a6a6d ro quiet splash
  ProcVersionSignature: Ubuntu 3.19.0-28.30-generic 3.19.8-ckt5
  RelatedPackageVersions:
   linux-restricted-modules-3.19.0-28-generic N/A
   linux-backports-modules-3.19.0-28-generic  N/A
   linux-firmware                             1.143.3
  Tags:  vivid
  Uname: Linux 3.19.0-28-generic x86_64
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo
  _MarkForUpload: True
  dmi.bios.date: 07/11/2011
  dmi.bios.vendor: LENOVO
  dmi.bios.version: 8AET49WW (1.29 )
  dmi.board.asset.tag: Not Available
  dmi.board.name: 4239CTO
  dmi.board.vendor: LENOVO
  dmi.board.version: Not Available
  dmi.chassis.asset.tag: No Asset Information
  dmi.chassis.type: 10
  dmi.chassis.vendor: LENOVO
  dmi.chassis.version: Not Available
  dmi.modalias: dmi:bvnLENOVO:bvr8AET49WW(1.29):bd07/11/2011:svnLENOVO:pn4239CTO:pvrThinkPadT520:rvnLENOVO:rn4239CTO:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable:
  dmi.product.name: 4239CTO
  dmi.product.version: ThinkPad T520
  dmi.sys.vendor: LENOVO

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