I *think* I have the same touchpad issue with an IdeaPad 320. How do I
find out if I have the same touchpad as in the Flex? I have no Windows
to find out running it:(

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https://bugs.launchpad.net/bugs/1658345

Title:
  Touchpad not recognized on Lenovo Ideapad Flex 4 running Ubuntu 16.10

Status in linux package in Ubuntu:
  Confirmed

Bug description:
  I installed Ubuntu 16.10 on my Lenovo Ideapad Flex 4 laptop. Ubuntu does not 
recognize the touchpad (it does recognize the touch screen nicely though). When 
I run xinput -list, I do not see the touchpad. I dual boot with Windows 10, 
which recognizes the touchpad from Elantech. I searched online for days and I 
found Elantech drivers for Ubuntu 14.04, however, I was unable to load older 
versions of Ubuntu on my laptop. Do you expect to support the Elantech touchpad 
in future updates? I attached a screen shot of my xinput -list output. Please 
let me know if you require any additional information. Thank you.
  --- 
  ApportVersion: 2.20.3-0ubuntu8.2
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  keary      2345 F.... pulseaudio
  DistroRelease: Ubuntu 16.10
  HibernationDevice: RESUME=UUID=dbfec3b4-a8be-406e-9f39-5258c004c656
  InstallationDate: Installed on 2017-01-18 (2 days ago)
  InstallationMedia: Ubuntu 16.10 "Yakkety Yak" - Release amd64 (20161012.2)
  Lsusb:
   Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
   Bus 001 Device 003: ID 0bda:57fc Realtek Semiconductor Corp. 
   Bus 001 Device 002: ID 0cf3:e500 Atheros Communications, Inc. 
   Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
  MachineType: LENOVO 80U3
  Package: linux (not installed)
  ProcEnviron:
   LANGUAGE=en_US
   TERM=xterm-256color
   PATH=(custom, no user)
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.8.0-34-generic.efi.signed 
root=UUID=5be7438e-36fd-4960-a4cd-2371715adfa2 ro quiet splash i8042.kbdreset=1 
vt.handoff=7
  ProcVersionSignature: Ubuntu 4.8.0-34.36-generic 4.8.11
  PulseList:
   Error: command ['pacmd', 'list'] failed with exit code 1: Home directory not 
accessible: Permission denied
   No PulseAudio daemon running, or not running as session daemon.
  RelatedPackageVersions:
   linux-restricted-modules-4.8.0-34-generic N/A
   linux-backports-modules-4.8.0-34-generic  N/A
   linux-firmware                            1.161.1
  Tags:  yakkety
  Uname: Linux 4.8.0-34-generic x86_64
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups:
   
  _MarkForUpload: True
  dmi.bios.date: 11/01/2016
  dmi.bios.vendor: LENOVO
  dmi.bios.version: 2MCN24WW
  dmi.board.asset.tag: No Asset Tag
  dmi.board.name: Sofia-F
  dmi.board.vendor: LENOVO
  dmi.board.version: SDK0J91204WIN
  dmi.chassis.asset.tag: No Asset Tag
  dmi.chassis.type: 10
  dmi.chassis.vendor: LENOVO
  dmi.chassis.version: Lenovo ideapad FLEX 4-1130
  dmi.modalias: 
dmi:bvnLENOVO:bvr2MCN24WW:bd11/01/2016:svnLENOVO:pn80U3:pvrLenovoideapadFLEX4-1130:rvnLENOVO:rnSofia-F:rvrSDK0J91204WIN:cvnLENOVO:ct10:cvrLenovoideapadFLEX4-1130:
  dmi.product.name: 80U3
  dmi.product.version: Lenovo ideapad FLEX 4-1130
  dmi.sys.vendor: LENOVO
  --- 
  ApportVersion: 2.20.4-0ubuntu4
  Architecture: amd64
  DistroRelease: Ubuntu 17.04
  InstallationDate: Installed on 2017-01-18 (181 days ago)
  InstallationMedia: Ubuntu 16.10 "Yakkety Yak" - Release amd64 (20161012.2)
  Package: linux (not installed)
  ProcEnviron:
   LANGUAGE=en_US
   TERM=xterm-256color
   PATH=(custom, no user)
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  Tags:  zesty
  Uname: Linux 4.13.0-041300rc1-generic x86_64
  UnreportableReason: The running kernel is not an Ubuntu kernel
  UpgradeStatus: Upgraded to zesty on 2017-05-07 (73 days ago)
  UserGroups:
   
  _MarkForUpload: True
  --- 
  ApportVersion: 2.20.4-0ubuntu4
  Architecture: amd64
  DistroRelease: Ubuntu 17.04
  InstallationDate: Installed on 2017-01-18 (208 days ago)
  InstallationMedia: Ubuntu 16.10 "Yakkety Yak" - Release amd64 (20161012.2)
  Package: linux (not installed)
  ProcEnviron:
   LANGUAGE=en_US
   TERM=xterm-256color
   PATH=(custom, no user)
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  Tags:  zesty
  Uname: Linux 4.13.0-rc5-elan0602 x86_64
  UnreportableReason: The running kernel is not an Ubuntu kernel
  UpgradeStatus: Upgraded to zesty on 2017-05-07 (100 days ago)
  UserGroups:
   
  _MarkForUpload: True

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