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 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1683760/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp