I do not believe I owned this laptop far enough back to have installed
15.10. I believe the first installation I put on it was 16.04.

Additionally, I tried the kernel boot param of "i8042.kbdreset=1". When
I booted up the next time I saw the following output from xinput:

$ xinput 
⎡ Virtual core pointer                          id=2    [master pointer  (3)]
⎜   ↳ Virtual core XTEST pointer                id=4    [slave  pointer  (2)]
⎜   ↳ PS/2 Elantech Touchpad                    id=14   [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)]
    ↳ Yubico Yubikey 4 OTP+U2F+CCID             id=10   [slave  keyboard (3)]
    ↳ Lenovo EasyCamera                         id=11   [slave  keyboard (3)]
    ↳ Ideapad extra buttons                     id=12   [slave  keyboard (3)]
    ↳ AT Translated Set 2 keyboard              id=13   [slave  keyboard (3)]

But almost as soon as I started to move the pointer around the touchpad
locked up (pointer stopped responding) for about 5-10 seconds and then
started working again, but now the output of xinput looked like:

$ xinput 
⎡ Virtual core pointer                          id=2    [master pointer  (3)]
⎜   ↳ Virtual core XTEST pointer                id=4    [slave  pointer  (2)]
⎜   ↳ PS/2 Logitech Wheel Mouse                 id=14   [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)]
    ↳ Yubico Yubikey 4 OTP+U2F+CCID             id=10   [slave  keyboard (3)]
    ↳ Lenovo EasyCamera                         id=11   [slave  keyboard (3)]
    ↳ Ideapad extra buttons                     id=12   [slave  keyboard (3)]
    ↳ AT Translated Set 2 keyboard              id=13   [slave  keyboard (3)]

Checking out dmesg, I saw:

[   33.327457] psmouse serio1: Touchpad at isa0060/serio1/input0 lost 
synchronization, throwing 2 bytes away.
[   33.880155] psmouse serio1: resync failed, issuing reconnect request
[   37.823561] psmouse serio1: Failed to deactivate mouse on isa0060/serio1
[   38.259688] input: PS/2 Logitech Wheel Mouse as 
/devices/platform/i8042/serio1/input/input20
[   38.381415] systemd[1]: motd-news.timer: Adding 25min 26.475299s random time.

So, as you can see, even when it does get detected as a touchpad it will
not remain functional for long.

I hope this helps!

Deven

** Changed in: linux (Ubuntu)
       Status: Incomplete => Confirmed

-- 
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/1683760

Title:
  ETPS/2 Elantech Touchpad inconsistently detected (Lenovo Y700 15ISK)

Status in linux package in Ubuntu:
  Confirmed

Bug description:
  This has been happening reliably on my Lenovo Y700 15ISK since
  15.10... Sometimes it shows up as ETPS/2, sometimes PS/2, sometimes
  Logitech Wheelmouse... Most of the time it shows as "PS/2 Logitech
  Wheel Mouse" but none of the multitouch (2 finger scroll, 3 finger
  middle-click) can be set up. synclient says no device is present.

  This is likely related to:
  https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1594214

  ProblemType: Bug
  DistroRelease: Ubuntu 17.04
  Package: linux-image-4.10.0-19-generic 4.10.0-19.21 [modified: 
boot/vmlinuz-4.10.0-19-generic]
  ProcVersionSignature: Ubuntu 4.10.0-19.21-generic 4.10.8
  Uname: Linux 4.10.0-19-generic x86_64
  ApportVersion: 2.20.4-0ubuntu4
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  dphillips   1280 F.... pulseaudio
  CurrentDesktop: XFCE
  Date: Tue Apr 18 07:40:12 2017
  InstallationDate: Installed on 2017-04-18 (0 days ago)
  InstallationMedia: Xubuntu 17.04 "Zesty Zapus" - Release amd64 (20170412)
  MachineType: LENOVO 80NV
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.10.0-19-generic.efi.signed 
root=UUID=8bba488a-b6df-4c29-8a90-8811c1078048 ro quiet splash i8042.kbdreset=1 
vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-4.10.0-19-generic N/A
   linux-backports-modules-4.10.0-19-generic  N/A
   linux-firmware                             1.164
  SourcePackage: linux
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 09/19/2016
  dmi.bios.vendor: LENOVO
  dmi.bios.version: CDCN53WW
  dmi.board.asset.tag: NO Asset Tag
  dmi.board.name: Allsparks 5A
  dmi.board.vendor: LENOVO
  dmi.board.version: SDK0J40709 WIN
  dmi.chassis.asset.tag: NO Asset Tag
  dmi.chassis.type: 10
  dmi.chassis.vendor: LENOVO
  dmi.chassis.version: Lenovo ideapad Y700-15ISK
  dmi.modalias: 
dmi:bvnLENOVO:bvrCDCN53WW:bd09/19/2016:svnLENOVO:pn80NV:pvrLenovoideapadY700-15ISK:rvnLENOVO:rnAllsparks5A:rvrSDK0J40709WIN:cvnLENOVO:ct10:cvrLenovoideapadY700-15ISK:
  dmi.product.name: 80NV
  dmi.product.version: Lenovo ideapad Y700-15ISK
  dmi.sys.vendor: LENOVO

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