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[Samuli Kauranne <samuli.kauranne@xxxxxxxxx>]

apport information

** Attachment added: "UdevDb.txt"
   https://bugs.launchpad.net/bugs/1487334/+attachment/4466928/+files/UdevDb.txt

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https://bugs.launchpad.net/bugs/1487334

Title:
  Touchpad tap-event support broken since kernel 3.19.0-25

Status in linux package in Ubuntu:
  Incomplete

Bug description:
  Release: Ubuntu 15.04
  Hardware:  Logitech TK820 wireless keyboard with touchpad

  I've been using the said hardware with ubuntu in all releases since
  13.10 without problems. All touchpad features were working fine until
  I received in 15.04 the automatic update to kernel version 3.19.0-22.
  This kernel introduced a condition in which, at times, the system
  started randomly registering keyboard input when pointing with the
  touchpad.

  The original bug got apparently fixed in kernel version 3.19.0-25, but
  as a result this kernel version broke completely all tap-events for my
  touchpad. They are not registering at all. Pointing and scrolling
  work, so do the mechanical click-switches in the corners, but tapping
  or sweeping with one or more fingers does not get registered even
  though the settings were never touched. I now got kernel update to
  3.19.0-26, but the bug persists in this version, too.

  At the moment I had to revert back to kernel version 3.19.0-16 in order to be able to use my touchpad normally.
  --- 
  ApportVersion: 2.17.2-0ubuntu1.4
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  samuli     1172 F.... pulseaudio
   /dev/snd/controlC1:  samuli     1172 F.... pulseaudio
  CurrentDesktop: X-Cinnamon
  DistroRelease: Ubuntu 15.04
  HibernationDevice: RESUME=UUID=caec55c5-801b-4ddb-81bf-ab7d116a7c9e
  InstallationDate: Installed on 2014-06-24 (449 days ago)
  InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140417)
  IwConfig:
   eth1      no wireless extensions.
   
   lo        no wireless extensions.
  MachineType: ASUS All Series
  Package: linux (not installed)
  ProcFB: 0 radeondrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.19.0-25-generic root=UUID=3f007092-6b41-4366-b197-b265d0225a0e ro quiet splash vt.handoff=7
  ProcVersionSignature: Ubuntu 3.19.0-25.26-generic 3.19.8-ckt2
  RelatedPackageVersions:
   linux-restricted-modules-3.19.0-25-generic N/A
   linux-backports-modules-3.19.0-25-generic  N/A
   linux-firmware                             1.143.3
  RfKill:
   
  Tags:  vivid
  Uname: Linux 3.19.0-25-generic x86_64
  UpgradeStatus: Upgraded to vivid on 2015-04-24 (145 days ago)
  UserGroups: adm cdrom dip lpadmin plugdev sambashare samuli2 sudo
  _MarkForUpload: True
  dmi.bios.date: 05/16/2014
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: 0506
  dmi.board.asset.tag: To be filled by O.E.M.
  dmi.board.name: MAXIMUS VII GENE
  dmi.board.vendor: ASUSTeK COMPUTER INC.
  dmi.board.version: Rev 1.xx
  dmi.chassis.asset.tag: To Be Filled By O.E.M.
  dmi.chassis.type: 3
  dmi.chassis.vendor: To Be Filled By O.E.M.
  dmi.chassis.version: To Be Filled By O.E.M.
  dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr0506:bd05/16/2014:svnASUS:pnAllSeries:pvrSystemVersion:rvnASUSTeKCOMPUTERINC.:rnMAXIMUSVIIGENE:rvrRev1.xx:cvnToBeFilledByO.E.M.:ct3:cvrToBeFilledByO.E.M.:
  dmi.product.name: All Series
  dmi.product.version: System Version
  dmi.sys.vendor: ASUS

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