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[Allan Crooks <allan@xxxxxxxxxx>]

I tried using the kernel version that came with the released version of
12.04 (on an original install base of 12.04.3), but that seemed to cause
stability problems.

So instead, I installed the original version of 12.04, and that seemed
to work without reporting any problems.

I then installed 12.04.2 without applying any updates, and that also
seemed to work. So using the 3.5.x releases (I forget which version
12.04.2 uses by default), I started bisecting to try and find out which
version seemed to introduce the problem.

I was able to find various releases where the bug didn't seem to exhibit itself after continued use:
 - 3.5.0-23
 - 3.5.0-27
 - 3.5.0-31

And various versions where it did:
 - 3.5.0-32
 - 3.5.0-34
 - 3.5.0-44

Tailing kern.log using the 3.5.0-32 kernel:

Dec 21 23:47:00 wyvern kernel: [    8.931123] input: HDA Intel PCH Mic as /devices/pci0000:00/0000:00:1b.0/sound/card1/input10
Dec 21 23:47:00 wyvern kernel: [    8.931174] input: HDA Intel PCH Front Headphone as /devices/pci0000:00/0000:00:1b.0/sound/card1/input11
Dec 21 23:47:00 wyvern kernel: [    8.931211] input: HDA Intel PCH Line Out as /devices/pci0000:00/0000:00:1b.0/sound/card1/input12
Dec 21 23:47:17 wyvern kernel: [   25.264221] audit_printk_skb: 39 callbacks suppressed
Dec 21 23:47:17 wyvern kernel: [   25.264224] type=1400 audit(1387669637.133:24): apparmor="DENIED" operation="open" parent=1 profile="/usr/lib/telepathy/mission-control-5" name="/usr/share/gvfs/remote-volume-monitors/" pid=2084 comm="mission-control" requested_mask="r" denied_mask="r" fsuid=1000 ouid=0
Dec 21 23:49:21 wyvern kernel: [  149.924471] psmouse serio1: DualPoint TouchPad at isa0060/serio1/input0 lost sync at byte 1
Dec 21 23:49:21 wyvern kernel: [  149.927574] psmouse serio1: DualPoint TouchPad at isa0060/serio1/input0 - driver resynced.
Dec 21 23:49:21 wyvern kernel: [  149.938434] psmouse serio1: DualPoint TouchPad at isa0060/serio1/input0 lost sync at byte 1
Dec 21 23:49:21 wyvern kernel: [  149.939441] psmouse serio1: DualPoint TouchPad at isa0060/serio1/input0 lost sync at byte 1
Dec 21 23:49:21 wyvern kernel: [  149.950001] psmouse serio1: DualPoint TouchPad at isa0060/serio1/input0 - driver resynced.
Dec 21 23:49:53 wyvern kernel: [  181.549147] psmouse serio1: DualPoint TouchPad at isa0060/serio1/input0 lost sync at byte 1
Dec 21 23:49:53 wyvern kernel: [  181.552185] psmouse serio1: DualPoint TouchPad at isa0060/serio1/input0 - driver resynced.
Dec 21 23:49:53 wyvern kernel: [  181.553205] psmouse serio1: DualPoint TouchPad at isa0060/serio1/input0 lost sync at byte 1
Dec 21 23:49:53 wyvern kernel: [  181.560211] psmouse serio1: DualPoint TouchPad at isa0060/serio1/input0 - driver resynced.
Dec 21 23:49:53 wyvern kernel: [  181.594732] psmouse serio1: DualPoint TouchPad at isa0060/serio1/input0 lost sync at byte 1
Dec 21 23:49:53 wyvern kernel: [  181.604921] psmouse serio1: DualPoint TouchPad at isa0060/serio1/input0 - driver resynced.
Dec 21 23:51:01 wyvern kernel: [  249.472364] psmouse serio1: DualPoint TouchPad at isa0060/serio1/input0 lost sync at byte 1
Dec 21 23:51:01 wyvern kernel: [  249.473373] psmouse serio1: DualPoint TouchPad at isa0060/serio1/input0 lost sync at byte 1
Dec 21 23:51:01 wyvern kernel: [  249.474353] psmouse serio1: DualPoint TouchPad at isa0060/serio1/input0 lost sync at byte 1
Dec 21 23:51:01 wyvern kernel: [  249.477379] psmouse serio1: DualPoint TouchPad at isa0060/serio1/input0 - driver resynced.
Dec 21 23:51:42 wyvern kernel: [  290.179193] psmouse serio1: DualPoint TouchPad at isa0060/serio1/input0 lost sync at byte 1
Dec 21 23:51:42 wyvern kernel: [  290.182195] psmouse serio1: DualPoint TouchPad at isa0060/serio1/input0 - driver resynced.
Dec 21 23:51:42 wyvern kernel: [  290.183196] psmouse serio1: DualPoint TouchPad at isa0060/serio1/input0 lost sync at byte 1
Dec 21 23:51:42 wyvern kernel: [  290.190199] psmouse serio1: DualPoint TouchPad at isa0060/serio1/input0 - driver resynced.
Dec 21 23:51:42 wyvern kernel: [  290.191148] psmouse serio1: DualPoint TouchPad at isa0060/serio1/input0 lost sync at byte 1
Dec 21 23:51:42 wyvern kernel: [  290.194195] psmouse serio1: DualPoint TouchPad at isa0060/serio1/input0 - driver resynced.
^C
allanc@wyvern:~$ uname -a
Linux wyvern 3.5.0-32-generic #53~precise1-Ubuntu SMP Wed May 29 20:33:37 UTC 2013 x86_64 x86_64 x86_64 GNU/Linux

I was about to say that 3.5.0-32 seemed to be the first version I could
recreate the bug in, but in the time that I've been writing this
comment, I've encountered the "lost sync" error using the 3.5.0-31
kernel (it's taken nearly an hour of uptime and continual use to stumble
across it). I'll carry on bisecting it. It's anecdotal, but it did seem
that kernels which were 3.5.0-32 or later were able to trigger the bug
much quicker than the earlier kernel versions I was testing with.

-- 
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/1258837

Title:
  [Dell Latitude E7440] ALPS touchpad keeps having state reset

Status in “linux” package in Ubuntu:
  Incomplete

Bug description:
  This is very similar to bug 1048258 - the mouse cursor keeps on
  jumping around, and these messages appear in the log when it hapepns:

  Dec  7 21:57:26 wyvern kernel: [  648.133841] psmouse serio1: DualPoint TouchPad at isa0060/serio1/input0 lost sync at byte 1
  Dec  7 21:57:26 wyvern kernel: [  648.134868] psmouse serio1: DualPoint TouchPad at isa0060/serio1/input0 lost sync at byte 1
  Dec  7 21:57:26 wyvern kernel: [  648.137921] psmouse serio1: DualPoint TouchPad at isa0060/serio1/input0 - driver resynced.
  Dec  7 21:57:26 wyvern kernel: [  648.138852] psmouse serio1: DualPoint TouchPad at isa0060/serio1/input0 lost sync at byte 1
  Dec  7 21:57:26 wyvern kernel: [  648.148833] psmouse serio1: DualPoint TouchPad at isa0060/serio1/input0 - driver resynced.

  The touchpad is recognised as a "AlpsPS/2 ALPS DualPoint TouchPad".
  This is occurring with Ubuntu 13.10, though I have also seen this
  behaviour in the version of Linux Mint based on Ubuntu 13.04.

  ProblemType: Bug
  DistroRelease: Ubuntu 13.10
  Package: linux-image-3.11.0-14-generic 3.11.0-14.21
  ProcVersionSignature: Ubuntu 3.11.0-14.21-generic 3.11.7
  Uname: Linux 3.11.0-14-generic x86_64
  ApportVersion: 2.12.5-0ubuntu2.1
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC1:  allanc     1852 F.... pulseaudio
   /dev/snd/controlC0:  allanc     1852 F.... pulseaudio
  Date: Sat Dec  7 22:19:22 2013
  HibernationDevice: RESUME=UUID=a2a36712-35de-4e20-9d1a-df3520f401ec
  InstallationDate: Installed on 2013-12-07 (0 days ago)
  InstallationMedia: Ubuntu 13.10 "Saucy Salamander" - Release amd64 (20131016.1)
  MachineType: Dell Inc. Latitude E7440
  MarkForUpload: True
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.11.0-14-generic.efi.signed root=UUID=d03a42e6-0dea-4969-a682-eb4d255abc70 ro quiet splash vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-3.11.0-14-generic N/A
   linux-backports-modules-3.11.0-14-generic  N/A
   linux-firmware                             1.116
  SourcePackage: linux
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 08/14/2013
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: A03
  dmi.board.name: 07F3F4
  dmi.board.vendor: Dell Inc.
  dmi.board.version: A00
  dmi.chassis.type: 9
  dmi.chassis.vendor: Dell Inc.
  dmi.modalias: dmi:bvnDellInc.:bvrA03:bd08/14/2013:svnDellInc.:pnLatitudeE7440:pvr01:rvnDellInc.:rn07F3F4:rvrA00:cvnDellInc.:ct9:cvr:
  dmi.product.name: Latitude E7440
  dmi.product.version: 01
  dmi.sys.vendor: Dell Inc.

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