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[Julian Taylor <jtaylor.debian@xxxxxxxxxxxxxx>]

touchpad info in dmesg:
[    2.136673] psmouse serio1: synaptics: Touchpad model: 1, fw: 8.1, id: 0x1e2b1, caps: 0xd00123/0x840300/0x2a800, board id: 2848, fw id: 1581875

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https://bugs.launchpad.net/bugs/1381815

Title:
  left touchpad button stopped working in 3.16.0-22.19

Status in “linux” package in Ubuntu:
  Confirmed

Bug description:
  the left touchpad button of my lenovo g50 laptop stopped working in the kernel upgrade 3.16.0-22 #29
  The rest of the touchpad and the right button are still working.
  the previous kernel version #27 worked fine

  I have tried the mainline kernels and it is also affected from version 3.16.4 up to including the latest available ne 3.17.1.
  mainline kernel 3.16.3 works.

  ProblemType: Bug
  DistroRelease: Ubuntu 14.10
  Package: linux-image-3.16.0-22-generic 3.16.0-22.29
  ProcVersionSignature: Ubuntu 3.16.0-22.29-generic 3.16.4
  Uname: Linux 3.16.0-22-generic x86_64
  ApportVersion: 2.14.7-0ubuntu5
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  jtaylor    3144 F.... pulseaudio
   /dev/snd/controlC1:  jtaylor    3144 F.... pulseaudio
  CurrentDesktop: Unity
  Date: Thu Oct 16 01:39:27 2014
  HibernationDevice: RESUME=UUID=86457fb1-d8f8-46e4-9ad2-c85d69ec96f7
  InstallationDate: Installed on 2014-08-23 (53 days ago)
  InstallationMedia: Ubuntu 14.10 "Utopic Unicorn" - Alpha amd64 (20140822)
  MachineType: LENOVO 20351
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.16.0-22-generic root=/dev/mapper/ubuntu--vg-root ro quiet splash vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-3.16.0-22-generic N/A
   linux-backports-modules-3.16.0-22-generic  N/A
   linux-firmware                             1.135
  SourcePackage: linux
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 04/02/2014
  dmi.bios.vendor: LENOVO
  dmi.bios.version: 9ACN25WW
  dmi.board.asset.tag: No Asset Tag
  dmi.board.name: Lancer 5A2
  dmi.board.vendor: LENOVO
  dmi.board.version: NANANANANO DPK
  dmi.chassis.asset.tag: No Asset Tag
  dmi.chassis.type: 10
  dmi.chassis.vendor: LENOVO
  dmi.chassis.version: Lenovo G50-70
  dmi.modalias: dmi:bvnLENOVO:bvr9ACN25WW:bd04/02/2014:svnLENOVO:pn20351:pvrLenovoG50-70:rvnLENOVO:rnLancer5A2:rvrNANANANANODPK:cvnLENOVO:ct10:cvrLenovoG50-70:
  dmi.product.name: 20351
  dmi.product.version: Lenovo G50-70
  dmi.sys.vendor: LENOVO

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