[Bug 1590590] Re: Touchpad not recognized on Dell Latitude E7470 Ultrabook

[Paul Donohue]

No.  If I monitor interrupts, the Alps device actually stops sending
interrupts when the touchpad or trackstick stutters.

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Title:
  Touchpad not recognized on Dell Latitude E7470 Ultrabook

Status in linux package in Ubuntu:
  Triaged
Status in systemd package in Ubuntu:
  New
Status in xserver-xorg-input-synaptics package in Ubuntu:
  Confirmed

Bug description:
  Expected: Touchpad settings available in Mouse & Touchpad Settings
  dialog

  Actual result: Touchpad settings missing entirely

  
  Details:
  The touchpad on my Dell Ultrabook (Latitude E7470) functions mostly. 

  The settings for the touchpad are not available at all in the Mouse
  and Touchpad settings (see http://i.imgur.com/YRGiOrj.png).

  Two-finger scrolling works as expected except it's using "Natural
  Scrolling" by default and there is no way to change it.

  xinput list does not display a touchpad at all:

  ⎡ Virtual core pointer                    	id=2	[master pointer  (3)]
  ⎜   ↳ Virtual core XTEST pointer              	id=4	[slave  pointer  (2)]
  ⎜   ↳ ELAN Touchscreen                        	id=11	[slave  pointer  (2)]
  ⎜   ↳ ImPS/2 Generic Wheel Mouse              	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)]
      ↳ Integrated_Webcam_FHD                   	id=10	[slave  keyboard (3)]
      ↳ AT Translated Set 2 keyboard            	id=12	[slave  keyboard (3)]
      ↳ Dell WMI hotkeys                        	id=14	[slave  keyboard (3)]
      ↳ DELL Wireless hotkeys                   	id=15	[slave  keyboard (3)]

  
  /proc/bus/input/devices lists the device as a "Generic Wheel Mouse"

  Output of `lsb_release -rd`:
  Description:	Ubuntu 16.04 LTS
  Release:	16.04

  xserver-xorg-input-synaptics version information:
  xserver-xorg-input-synaptics:
    Installed: 1.8.2-1ubuntu3
    Candidate: 1.8.2-1ubuntu3
    Version table:
   *** 1.8.2-1ubuntu3 500
          500 http://us.archive.ubuntu.com/ubuntu xenial/main amd64 Packages
          100 /var/lib/dpkg/status

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