Public bug reported:

After upgrading from ubuntu 13.04 to 13.10 the touchpad on my Acer
Aspire 5720 laptop is no longer recognised by the kernel.

Running xinput I get:

⎡ Virtual core pointer                          id=2    [master pointer  (3)]
⎜   ↳ Virtual core XTEST pointer                id=4    [slave  pointer  (2)]
⎜   ↳ ImPS/2 Generic Wheel Mouse                id=12   [slave  pointer  (2)]
⎜   ↳ MCE IR Keyboard/Mouse (ene_ir)            id=13   [slave  pointer  (2)]
⎣ Virtual core keyboard                         id=3    [master keyboard (2)]
    ↳ Virtual core XTEST keyboard               id=5    [slave  keyboard (3)]
    ↳ Power Button                              id=6    [slave  keyboard (3)]
    ↳ Video Bus                                 id=7    [slave  keyboard (3)]
    ↳ Power Button                              id=8    [slave  keyboard (3)]
    ↳ Sleep Button                              id=9    [slave  keyboard (3)]
    ↳ Acer Crystal Eye webcam                   id=10   [slave  keyboard (3)]
    ↳ AT Translated Set 2 keyboard              id=11   [slave  keyboard (3)]
    ↳ ENE eHome Infrared Remote Receiver        id=14   [slave  keyboard (3)]


System Settings > Mouse & Touchpad only shows settings for mice (no touchpad 
settings present).

Using Google I see various other reports of the same problem on
different laptops and the consensus is that it is a problem with the
kernel NOT with synaptics.

***The Acer Aspire 5720 has three physical buttons below the touchpad***
- Left, Right, and a middle 4-way button, which has previously always
worked for scrolling up/down/left/right.  Only up and down works but it
only "scrolls" up or down one line at a time (no continuous scrolling by
holding the up/down button down).

I have managed to get a partial fix by adding "options psmouse
proto=imps" to /etc/modprobe.d/options.conf and then running:

sudo modprobe -r psmouse
sudo modprobe psmouse

That gets the physical middle button scrolling up/down working correctly
but still no left/right scroll and no way to turn off touchpad tap to
click (Grrr!  Grrr! and thrice Grrr!)

Help!

** Affects: xserver-xorg-input-synaptics (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: acer aspire kernel-bug touchpad

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https://bugs.launchpad.net/bugs/1254092

Title:
  Touchpad not recognised on Acer Aspire 5720 after upgrade to 13.10

Status in “xserver-xorg-input-synaptics” package in Ubuntu:
  New

Bug description:
  After upgrading from ubuntu 13.04 to 13.10 the touchpad on my Acer
  Aspire 5720 laptop is no longer recognised by the kernel.

  Running xinput I get:

  ⎡ Virtual core pointer                        id=2    [master pointer  (3)]
  ⎜   ↳ Virtual core XTEST pointer                      id=4    [slave  pointer 
 (2)]
  ⎜   ↳ ImPS/2 Generic Wheel Mouse                      id=12   [slave  pointer 
 (2)]
  ⎜   ↳ MCE IR Keyboard/Mouse (ene_ir)                  id=13   [slave  pointer 
 (2)]
  ⎣ Virtual core keyboard                       id=3    [master keyboard (2)]
      ↳ Virtual core XTEST keyboard                     id=5    [slave  
keyboard (3)]
      ↳ Power Button                                    id=6    [slave  
keyboard (3)]
      ↳ Video Bus                                       id=7    [slave  
keyboard (3)]
      ↳ Power Button                                    id=8    [slave  
keyboard (3)]
      ↳ Sleep Button                                    id=9    [slave  
keyboard (3)]
      ↳ Acer Crystal Eye webcam                         id=10   [slave  
keyboard (3)]
      ↳ AT Translated Set 2 keyboard                    id=11   [slave  
keyboard (3)]
      ↳ ENE eHome Infrared Remote Receiver              id=14   [slave  
keyboard (3)]

  
  System Settings > Mouse & Touchpad only shows settings for mice (no touchpad 
settings present).

  Using Google I see various other reports of the same problem on
  different laptops and the consensus is that it is a problem with the
  kernel NOT with synaptics.

  ***The Acer Aspire 5720 has three physical buttons below the
  touchpad*** - Left, Right, and a middle 4-way button, which has
  previously always worked for scrolling up/down/left/right.  Only up
  and down works but it only "scrolls" up or down one line at a time (no
  continuous scrolling by holding the up/down button down).

  I have managed to get a partial fix by adding "options psmouse
  proto=imps" to /etc/modprobe.d/options.conf and then running:

  sudo modprobe -r psmouse
  sudo modprobe psmouse

  That gets the physical middle button scrolling up/down working
  correctly but still no left/right scroll and no way to turn off
  touchpad tap to click (Grrr!  Grrr! and thrice Grrr!)

  Help!

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https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-input-synaptics/+bug/1254092/+subscriptions

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