Lenovo IdeaPad Z570 touchpad stopped working after upgrade to 15.04

Question

Having just upgraded to Ubuntu 15.04 (from 14.04 via 14.10) my touchpad does not appear to be working. It is still however possible to make use of a USB connected mouse.

Following the instructions here I have tried to diagnose the problem with the following results:

• Check whether the kernel has detected the Touchpad

  $ cat /proc/bus/input/devices | grep TouchPad
  N: Name="SynPS/2 Synaptics TouchPad"
  

• Check whether xserver has detected the Touchpad

  $ xinput --list | grep TouchPad
  ⎜   ↳ SynPS/2 Synaptics TouchPad                id=13   [slave  pointer  (2)]
  

• Check whether the synaptics module is correctly loaded in xserver

  $ cat /var/log/Xorg.0.log | grep -i synaptics
  [    33.606] (II) config/udev: Adding input device SynPS/2 Synaptics TouchPad (/dev/input/event5)
  [    33.606] (**) SynPS/2 Synaptics TouchPad: Applying InputClass "evdev touchpad catchall"
  [    33.606] (II) Using input driver 'evdev' for 'SynPS/2 Synaptics TouchPad'
  [    33.606] (**) SynPS/2 Synaptics TouchPad: always reports core events
  [    33.606] (**) evdev: SynPS/2 Synaptics TouchPad: Device: "/dev/input/event5"
  [    33.606] (--) evdev: SynPS/2 Synaptics TouchPad: Vendor 0x2 Product 0x7
  [    33.606] (--) evdev: SynPS/2 Synaptics TouchPad: Found 3 mouse buttons
  [    33.606] (--) evdev: SynPS/2 Synaptics TouchPad: Found absolute axes
  [    33.606] (--) evdev: SynPS/2 Synaptics TouchPad: Found absolute multitouch axes
  [    33.606] (--) evdev: SynPS/2 Synaptics TouchPad: Found x and y absolute axes
  [    33.606] (--) evdev: SynPS/2 Synaptics TouchPad: Found absolute touchpad.
  [    33.606] (II) evdev: SynPS/2 Synaptics TouchPad: Configuring as touchpad
  [    33.606] (**) evdev: SynPS/2 Synaptics TouchPad: YAxisMapping: buttons 4 and 5
  [    33.606] (**) evdev: SynPS/2 Synaptics TouchPad: EmulateWheelButton: 4, EmulateWheelInertia: 10, EmulateWheelTimeout: 200
  [    33.606] (II) XINPUT: Adding extended input device "SynPS/2 Synaptics TouchPad" (type: TOUCHPAD, id 13)
  [    33.606] (II) evdev: SynPS/2 Synaptics TouchPad: initialized for absolute axes.
  [    33.606] (**) SynPS/2 Synaptics TouchPad: (accel) keeping acceleration scheme 1
  [    33.606] (**) SynPS/2 Synaptics TouchPad: (accel) acceleration profile 0
  [    33.606] (**) SynPS/2 Synaptics TouchPad: (accel) acceleration factor: 2.000
  [    33.606] (**) SynPS/2 Synaptics TouchPad: (accel) acceleration threshold: 4
  [    33.606] (II) config/udev: Adding input device SynPS/2 Synaptics TouchPad (/dev/input/mouse1)
  

• For problems such as scrolling area, touch area, button wrong mapping, and multitouch

  $ xinput --list-props 13
  Device 'SynPS/2 Synaptics TouchPad':
  Device Enabled (116):   1
  Coordinate Transformation Matrix (118): 1.000000, 0.000000, 0.000000, 0.000000, 1.000000, 0.000000, 0.000000, 0.000000, 1.000000
  Device Accel Profile (243): 0
  Device Accel Constant Deceleration (244):   1.000000
  Device Accel Adaptive Deceleration (245):   1.000000
  Device Accel Velocity Scaling (246):    10.000000
  Device Product ID (236):    2, 7
  Device Node (237):  "/dev/input/event5"
  Evdev Axis Inversion (247): 0, 0
  Evdev Axis Calibration (248):   
  Evdev Axes Swap (249):  0
  Axis Labels (250):  "Abs MT Position X" (269), "Abs MT Position Y" (270), "Abs Pressure" (267), "Abs Tool Width" (268), "None" (0), "None" (0)
  Button Labels (251):    "Button Left" (119), "Button Unknown" (239), "Button Right" (121), "Button Wheel Up" (122), "Button Wheel Down" (123)
  Evdev Scrolling Distance (252): 0, 0, 0
  Evdev Middle Button Emulation (253):    0
  Evdev Middle Button Timeout (254):  50
  Evdev Third Button Emulation (255): 0
  Evdev Third Button Emulation Timeout (256): 1000
  Evdev Third Button Emulation Button (257):  3
  Evdev Third Button Emulation Threshold (258):   20
  Evdev Wheel Emulation (259):    0
  Evdev Wheel Emulation Axes (260):   0, 0, 4, 5
  Evdev Wheel Emulation Inertia (261):    10
  Evdev Wheel Emulation Timeout (262):    200
  Evdev Wheel Emulation Button (263): 4
  Evdev Drag Lock Buttons (264):  0
  

I cannot see anything in the results to suggest I have a problem and have yet to find any solutions to similar problems that have worked for me.

I would appreciate any assistance in this matter.

My system information is:

$ uname -a
Linux Ideapad-Z570 3.19.0-26-generic #28-Ubuntu SMP Tue Aug 11 14:16:45 UTC 2015 i686 i686 i686 GNU/Linux

Thanks.

Answer 1

It's probably because there's something wrong with the synclient installation. Reinstall that and reboot.