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[Po-Hsu Lin <po-hsu.lin@xxxxxxxxxxxxx>]

I can't reporoduce this on 3.16.0-29 kernel, can't reproduce this after revert back to 3.13.0-44 as well.
Maybe it's just a glitch.
I will mark this as Invalid, thanks!

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https://bugs.launchpad.net/bugs/1412346

Title:
  [Dell Latitude 3340] With one finger on the touchpad, the button click
  event won't be sent until you release the button

Status in HWE Next Project:
  Invalid
Status in linux package in Ubuntu:
  Invalid

Bug description:
  CID: 201312-14381 Dell Latitude 3340

  This system has a touchpad and two physical buttons.

  Steps:
  1. Install 14.04.1 + update (3.13.0-43), boot to desktop and open the nautilus.
  2. Try to select multiple files with one finger on the touchpad, hold the left button and hover the cursor across them.
  3. Try to select multiple files with holding the left button first, then put one finger on the touchpad, hover the cursor across them.

  Expected result:
  * Should be able to select multiple files with step 2 and 3

  Actual result:
  * Multiple file selection only works in step 3

  
  Debugging infromation:
  xev output for actions in step 2:
  MotionNotify event, serial 58, synthetic NO, window 0x3800001,
  MotionNotify event, serial 58, synthetic NO, window 0x3800001,
  MotionNotify event, serial 58, synthetic NO, window 0x3800001,
  MotionNotify event, serial 58, synthetic NO, window 0x3800001,
  MotionNotify event, serial 58, synthetic NO, window 0x3800001,
  MotionNotify event, serial 58, synthetic NO, window 0x3800001,
  MotionNotify event, serial 58, synthetic NO, window 0x3800001,
  MotionNotify event, serial 58, synthetic NO, window 0x3800001,
  MotionNotify event, serial 58, synthetic NO, window 0x3800001,
  MotionNotify event, serial 58, synthetic NO, window 0x3800001,
  ButtonPress event, serial 58, synthetic NO, window 0x3800001,
  ButtonRelease event, serial 58, synthetic NO, window 0x3800001,
  MotionNotify event, serial 58, synthetic NO, window 0x3800001,
  MotionNotify event, serial 58, synthetic NO, window 0x3800001,

  xev output for actions in step 3:
  ButtonPress event, serial 58, synthetic NO, window 0x3800001,
  MotionNotify event, serial 58, synthetic NO, window 0x3800001,
  MotionNotify event, serial 58, synthetic NO, window 0x3800001,
  MotionNotify event, serial 58, synthetic NO, window 0x3800001,
  MotionNotify event, serial 58, synthetic NO, window 0x3800001,
  MotionNotify event, serial 58, synthetic NO, window 0x3800001,
  MotionNotify event, serial 58, synthetic NO, window 0x3800001,
  MotionNotify event, serial 58, synthetic NO, window 0x3800001,
  MotionNotify event, serial 58, synthetic NO, window 0x3800001,
  MotionNotify event, serial 58, synthetic NO, window 0x3800001,
  MotionNotify event, serial 58, synthetic NO, window 0x3800001,
  MotionNotify event, serial 58, synthetic NO, window 0x3800001,
  MotionNotify event, serial 58, synthetic NO, window 0x3800001,
  MotionNotify event, serial 58, synthetic NO, window 0x3800001,
  MotionNotify event, serial 58, synthetic NO, window 0x3800001,
  MotionNotify event, serial 58, synthetic NO, window 0x3800001,
  MotionNotify event, serial 58, synthetic NO, window 0x3800001,
  MotionNotify event, serial 58, synthetic NO, window 0x3800001,
  MotionNotify event, serial 58, synthetic NO, window 0x3800001,
  ButtonRelease event, serial 58, synthetic NO, window 0x3800001,

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: linux-image-3.13.0-43-generic 3.13.0-43.72
  ProcVersionSignature: Ubuntu 3.13.0-43.72-generic 3.13.11.11
  Uname: Linux 3.13.0-43-generic x86_64
  ApportVersion: 2.14.1-0ubuntu3.6
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC1:  ubuntu     1509 F.... pulseaudio
   /dev/snd/controlC0:  ubuntu     1509 F.... pulseaudio
  CRDA:
   country TW:
   	(2402 - 2472 @ 40), (3, 27)
   	(5270 - 5330 @ 40), (3, 17), DFS
   	(5735 - 5815 @ 40), (3, 30)
  CurrentDesktop: Unity
  Date: Mon Jan 19 02:58:37 2015
  HibernationDevice: RESUME=UUID=82e19285-fa50-41f3-80e1-7c406fcadecd
  InstallationDate: Installed on 2015-01-09 (10 days ago)
  InstallationMedia: Ubuntu 14.04.1 LTS "Trusty Tahr" - Release amd64 (20140722.2)
  MachineType: Dell Inc. Latitude 3340
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-43-generic root=UUID=b43f1522-f0a6-4cb2-8358-506ba2468d5a ro quiet splash vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-3.13.0-43-generic N/A
   linux-backports-modules-3.13.0-43-generic  N/A
   linux-firmware                             1.127.11
  SourcePackage: linux
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 05/02/2014
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: A02
  dmi.board.name: 4OA010
  dmi.board.vendor: Dell Inc.
  dmi.board.version: D01
  dmi.chassis.type: 9
  dmi.chassis.vendor: Dell Inc.
  dmi.modalias: dmi:bvnDellInc.:bvrA02:bd05/02/2014:svnDellInc.:pnLatitude3340:pvr01:rvnDellInc.:rn4OA010:rvrD01:cvnDellInc.:ct9:cvr:
  dmi.product.name: Latitude 3340
  dmi.product.version: 01
  dmi.sys.vendor: Dell Inc.

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