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[Chris <meyer.cm@xxxxxxxxx>]

Mathias: After reproducing the error while running my logging/parser,
I've been able to identify that the pointer freeze issue is happening in
the code you linked.  Lines 188-192 are an if condition invalidating the
input whenever the final byte is set to 255.  In my logging, I'm seeing
that that byte is typically 16, 32, 64, and as the comments in the code
indicate, seems to be related to how much of my finger I allow to
contact the touchpad.  However, that byte occasionally (and spuriously)
gets set to 255; once set, it stays set at 255 until the touch is
removed and re-applied.

My current thinking is that removing the if condition would be
sufficient to prevent this issue, but I worry about side-effects when
the final byte is set to 255 for valid reasons.   Any ideas on the best
way to proceed?

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https://bugs.launchpad.net/bugs/1372609

Title:
  Touchpad detected as mouse on Asus ux303ln laptop

Status in linux package in Ubuntu:
  Fix Released
Status in linux package in Arch Linux:
  New

Bug description:
  Hi! I'm following the bug reporting documentation here:

  https://wiki.ubuntu.com/DebuggingTouchpadDetection#In_case_Touchpad_features_like_scrolling.2C_tapping.2C_etc._do_not_work_at_all.

  The touchpad on my new Asus ux303ln laptop is detected as a mouse, so
  I can't access touchpad features such as two-finger scrolling.

  The laptop was very recently released and I couldn't find any
  outstanding firmware updates for it through Asus's Windows-based
  tools.

  % lsb_release -rd
  Description:	Ubuntu 14.04.1 LTS
  Release:	14.04

  Per the instructions on the wiki, I'm attaching output from
  /proc/bus/input/devices,` xinput --list`, and /var/log/Xorg.0.log.

  This machine also has a touchscreen, which I'm fairly certain is the
  "maXtouch digitizer" visible in the logs. I haven't yet restarted in
  Windows to see if it says anything useful about the touchpad, but I
  can do so if that's helpful. This is a fresh install of 14.04 and I
  haven't done much customization of it apart from installing some
  applications and changing the default resolution.

  The only relevant bit I noticed in /var/log/dmesg is this:

  [    3.967547] input: PS/2 Logitech Wheel Mouse as
  /devices/platform/i8042/serio4/input/input11

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: linux-image-3.13.0-35-generic 3.13.0-35.62
  ProcVersionSignature: Ubuntu 3.13.0-35.62-generic 3.13.11.6
  Uname: Linux 3.13.0-35-generic x86_64
  ApportVersion: 2.14.1-0ubuntu3.4
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  tim        2234 F.... pulseaudio
   /dev/snd/controlC1:  tim        2234 F.... pulseaudio
  CurrentDesktop: Unity
  Date: Mon Sep 22 14:30:33 2014
  HibernationDevice: RESUME=UUID=e6052f15-271a-4424-aac2-9b0ee1e490ed
  InstallationDate: Installed on 2014-09-22 (0 days ago)
  InstallationMedia: Ubuntu 14.04.1 LTS "Trusty Tahr" - Release amd64 (20140722.2)
  Lsusb:
   Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
   Bus 001 Device 003: ID 03eb:8a32 Atmel Corp. 
   Bus 001 Device 002: ID 064e:9700 Suyin Corp. 
   Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
  MachineType: ASUSTeK COMPUTER INC. UX303LN
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-35-generic.efi.signed root=UUID=4f908b1b-e06f-4dc9-9642-e952d2598e42 ro quiet splash vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-3.13.0-35-generic N/A
   linux-backports-modules-3.13.0-35-generic  N/A
   linux-firmware                             1.127.6
  SourcePackage: linux
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 06/23/2014
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: UX303LN.203
  dmi.board.asset.tag: ATN12345678901234567
  dmi.board.name: UX303LN
  dmi.board.vendor: ASUSTeK COMPUTER INC.
  dmi.board.version: 1.0
  dmi.chassis.asset.tag: No Asset Tag
  dmi.chassis.type: 10
  dmi.chassis.vendor: ASUSTeK COMPUTER INC.
  dmi.chassis.version: 1.0
  dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrUX303LN.203:bd06/23/2014:svnASUSTeKCOMPUTERINC.:pnUX303LN:pvr1.0:rvnASUSTeKCOMPUTERINC.:rnUX303LN:rvr1.0:cvnASUSTeKCOMPUTERINC.:ct10:cvr1.0:
  dmi.product.name: UX303LN
  dmi.product.version: 1.0
  dmi.sys.vendor: ASUSTeK COMPUTER INC.

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