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[Major Hayden <major@xxxxxxxx>]

Mario --

So 3.18 didn't have any touchpad freeze or tapping issues?  I've tested
3.18.3 and 3.18.5 on Fedora and they have the freezes.  I'm wondering if
something broke between 3.18.0 and 3.18.3.  Do you have any additional
details on that 3.18 kernel you tested?  Perhaps the git hash?

-- 
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https://bugs.launchpad.net/bugs/1416601

Title:
  touchpad does not respond to tap-to-clicks in I2C mode in Ubuntu 15.04
  on 2015 XPS 13 (9343)

Status in Dell Sputnik:
  Confirmed
Status in linux package in Ubuntu:
  Confirmed
Status in xserver-xorg-input-synaptics package in Ubuntu:
  Confirmed
Status in xserver-xorg-input-synaptics package in Fedora:
  Unknown

Bug description:
  Tap-to-click does not work unless I tap several times really fast
  (which is really hard to do), which also causes the cursor to move.
  This is a poor user experience.

  Relatedly, sometimes when using two-finger scrolling, the touchpad
  will get stuck such that I can let go and the cursor won't move. I can
  continue using two fingers to try scrolling, which works, but I can't
  get the cursor to move. If I tap the cursor several times really fast,
  I can eventually get the cursor unstuck so it moves again. I suspect
  that this is related to the tap-to-click issue.

  ProblemType: Bug
  DistroRelease: Ubuntu 15.04
  Package: linux-image-3.18.0-12-generic 3.18.0-12.13
  ProcVersionSignature: Ubuntu 3.18.0-12.13-generic 3.18.4
  Uname: Linux 3.18.0-12-generic x86_64
  ApportVersion: 2.15.1-0ubuntu4
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  jared      3714 F.... pulseaudio
  CurrentDesktop: Unity
  Date: Fri Jan 30 20:12:17 2015
  HibernationDevice: RESUME=UUID=af18bf4f-1453-4c8c-8b8e-abdc5d4e0674
  InstallationDate: Installed on 2014-11-03 (89 days ago)
  InstallationMedia: Ubuntu 14.04.1 LTS "Trusty Tahr" - Release amd64 (20140722.2)
  Lsusb:
   Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
   Bus 001 Device 004: ID 0c45:670c Microdia 
   Bus 001 Device 003: ID 04f3:2051 Elan Microelectronics Corp. 
   Bus 001 Device 002: ID 8087:0a2a Intel Corp. 
   Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
  MachineType: Dell Inc. XPS 13 9343
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.18.0-12-generic root=/dev/mapper/ubuntu--vg-root ro video.use_native_backlight=1 video.use_native_backlight=1
  RelatedPackageVersions:
   linux-restricted-modules-3.18.0-12-generic N/A
   linux-backports-modules-3.18.0-12-generic  N/A
   linux-firmware                             1.141
  SourcePackage: linux
  UpgradeStatus: Upgraded to vivid on 2015-01-08 (23 days ago)
  dmi.bios.date: 11/04/2014
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: A00
  dmi.board.name: 0144PA
  dmi.board.vendor: Dell Inc.
  dmi.board.version: X04
  dmi.chassis.type: 9
  dmi.chassis.vendor: Dell Inc.
  dmi.modalias: dmi:bvnDellInc.:bvrA00:bd11/04/2014:svnDellInc.:pnXPS139343:pvr01:rvnDellInc.:rn0144PA:rvrX04:cvnDellInc.:ct9:cvr:
  dmi.product.name: XPS 13 9343
  dmi.product.version: 01
  dmi.sys.vendor: Dell Inc.

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