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[Irfan Sopiyan <ryuffhant91@xxxxxxxxx>]

I think the xserver-xorg is causes tap action not work, because your
setting "TouchpadOff" is 2 (where only tapping is disabled). I had same
problem too, in Ubuntu GNOME 15.10 but when I try to configure using
"synclient TouchpadOff=0" (0= mean enables all functionally) it's
doesn't work. following this instruction
https://wiki.ubuntu.com/X/Config/Input#Input_Configuration_with_InputClass_sections
I make config file in /etc/X11/xorg.conf.d with name 50-synaptics.conf
to get back functionality of tap action in touchpad but when I try to
reboot, system doesn't load just stuck in file system check's screen.
I've been search for answer to solve this issue, but I not found it yet.

** Changed in: ubuntu-gnome
       Status: New => In Progress

** Also affects: xorg (Ubuntu)
   Importance: Undecided
       Status: New

** No longer affects: xorg (Ubuntu)

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https://bugs.launchpad.net/bugs/1514225

Title:
  Tap to click doesn't work

Status in Ubuntu GNOME:
  In Progress

Bug description:
  I initially reported a bug here
  (https://answers.launchpad.net/ubuntu/+question/273015) describing an
  issue in which Ubuntu GNOME wasn't detecting the tap to click
  functionality (or double tap, selecting text) even though the touchpad
  works when moving the cursor or scrolling. However, I just noticed
  after live testing an image of Ubuntu 15.10
  (http://releases.ubuntu.com/15.10/) 32 bits that tap to click actually
  works. Could this be a bug in Ubuntu GNOME?  To make sure, I live
  booted Ubuntu GNOME 15.10 (64 bits) and confirmed that tap to click
  didn't work.

  This is happening in a laptop Dell Inspiron 1545 with touchpad
  "AlpsPS/2 ALPS GlidePoint touchpad". I copy the relevant information:

  ➜ ~ xinput --list
  ⎡ Virtual core pointer id=2	[master pointer (3)]
  ⎜ ↳ Virtual core XTEST pointer id=4	[slave pointer (2)]
  ⎜ ↳ AlpsPS/2 ALPS GlidePoint id=12	[slave pointer (2)]
  ⎣ Virtual core keyboard id=3	[master keyboard (2)]
      ↳ Virtual core XTEST keyboard id=5	[slave keyboard (3)]
      ↳ Video Bus id=6	[slave keyboard (3)]
      ↳ Power Button id=7	[slave keyboard (3)]
      ↳ Sleep Button id=8	[slave keyboard (3)]
      ↳ Integrated Webcam id=10	[slave keyboard (3)]
      ↳ AT Translated Set 2 keyboard id=11	[slave keyboard (3)]
      ↳ Dell WMI hotkeys id=13	[slave keyboard (3)]
      ↳ HID 413c:8161 id=9	[slave keyboard (3)]

  ➜ ~ cat /proc/bus/input/devices
  ...
  I: Bus=0011 Vendor=0002 Product=0008 Version=0200
  N: Name="AlpsPS/2 ALPS GlidePoint"
  P: Phys=isa0060/serio2/input0
  S: Sysfs=/devices/platform/i8042/serio2/input/input9
  U: Uniq=
  H: Handlers=mouse1 event7
  B: PROP=1
  B: EV=b
  B: KEY=420 70000 0 0 0 0
  B: ABS=1000003

  ➜ ~ xinput list-props "AlpsPS/2 ALPS GlidePoint"
  Device 'AlpsPS/2 ALPS GlidePoint':
   Device Enabled (133):	1
   Coordinate Transformation Matrix (135):	1.000000, 0.000000, 0.000000, 0.000000, 1.000000, 0.000000, 0.000000, 0.000000, 1.000000
   Device Accel Profile (260):	1
   Device Accel Constant Deceleration (261):	2.500000
   Device Accel Adaptive Deceleration (262):	1.000000
   Device Accel Velocity Scaling (263):	12.500000
   Synaptics Edges (264):	153, 870, 115, 652
   Synaptics Finger (265):	12, 15, 0
   Synaptics Tap Time (266):	180
   Synaptics Tap Move (267):	56
   Synaptics Tap Durations (268):	180, 100, 100
   Synaptics ClickPad (269):	0
   Synaptics Middle Button Timeout (270):	75
   Synaptics Two-Finger Pressure (271):	141
   Synaptics Two-Finger Width (272):	7
   Synaptics Scrolling Distance (273):	25, 25
   Synaptics Edge Scrolling (274):	1, 1, 0
   Synaptics Two-Finger Scrolling (275):	0, 0
   Synaptics Move Speed (276):	1.000000, 1.750000, 0.156495, 0.000000
   Synaptics Off (277):	2
   Synaptics Locked Drags (278):	0
   Synaptics Locked Drags Timeout (279):	5000
   Synaptics Tap Action (280):	0, 0, 0, 0, 0, 0, 0
   Synaptics Click Action (281):	1, 1, 0
   Synaptics Circular Scrolling (282):	0
   Synaptics Circular Scrolling Distance (283):	0.100000
   Synaptics Circular Scrolling Trigger (284):	0
   Synaptics Circular Pad (285):	0
   Synaptics Palm Detection (286):	0
   Synaptics Palm Dimensions (287):	10, 100
   Synaptics Coasting Speed (288):	20.000000, 50.000000
   Synaptics Pressure Motion (289):	15, 80
   Synaptics Pressure Motion Factor (290):	1.000000, 1.000000
   Synaptics Resolution Detect (291):	1
   Synaptics Grab Event Device (292):	0
   Synaptics Gestures (293):	1
   Synaptics Capabilities (294):	1, 1, 1, 0, 0, 1, 0
   Synaptics Pad Resolution (295):	1, 1
   Synaptics Area (296):	0, 0, 0, 0
   Synaptics Noise Cancellation (297):	6, 6
   Device Product ID (255):	2, 8
   Device Node (256):	"/dev/input/event7"

  Thanks

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