Public bug reported:

After an upgrade touchpad does not work anymore.
System setting for touchpad does not show.
Reverting boot to previous kernel does not help.
It affects 12.04 too.

dmesg shows the device but no further action is taken.
[    0.420496] pnp 00:0a: Plug and Play ACPI device, IDs TOS0100 SYN0700 
SYN0002 PNP0f13 (active)

ProblemType: Bug
DistroRelease: Ubuntu 11.10
Package: xserver-xorg-input-synaptics 1.4.1-1ubuntu2
ProcVersionSignature: Ubuntu 3.0.0-16.29-generic 3.0.20
Uname: Linux 3.0.0-16-generic i686
ApportVersion: 1.23-0ubuntu4
Architecture: i386
Date: Sun Feb 26 19:53:27 2012
DistUpgraded: Fresh install
DistroCodename: oneiric
DistroVariant: ubuntu
InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Release i386 (20111012)
MachineType: TOSHIBA TOSHIBA NB550D
ProcEnviron:
 PATH=(custom, no user)
 LANG=it_IT.UTF-8
 SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.0.0-16-generic 
root=UUID=f827f165-f716-4370-b948-8186899ab291 ro quiet splash vt.handoff=7
SourcePackage: xserver-xorg-input-synaptics
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 07/22/2011
dmi.bios.vendor: TOSHIBA
dmi.bios.version: 1.40
dmi.board.asset.tag: NULL
dmi.board.name: PBU01
dmi.board.vendor: TOSHIBA
dmi.board.version: 1.00
dmi.chassis.asset.tag: *
dmi.chassis.type: 10
dmi.chassis.vendor: TOSHIBA
dmi.chassis.version: N/A
dmi.modalias: 
dmi:bvnTOSHIBA:bvr1.40:bd07/22/2011:svnTOSHIBA:pnTOSHIBANB550D:pvrPLL5FE-02J01LIT:rvnTOSHIBA:rnPBU01:rvr1.00:cvnTOSHIBA:ct10:cvrN/A:
dmi.product.name: TOSHIBA NB550D
dmi.product.version: PLL5FE-02J01LIT
dmi.sys.vendor: TOSHIBA
version.compiz: compiz 1:0.9.6+bzr20110929-0ubuntu6.1
version.libdrm2: libdrm2 2.4.26-1ubuntu1
version.libgl1-mesa-dri: libgl1-mesa-dri 7.11-0ubuntu3.1
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 7.11-0ubuntu3.1
version.xserver-xorg: xserver-xorg 1:7.6+7ubuntu7.1
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.6.0-1ubuntu13
version.xserver-xorg-video-ati: xserver-xorg-video-ati 
1:6.14.99~git20110811.g93fc084-0ubuntu1
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.15.901-1ubuntu2.2
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 
1:0.0.16+git20110411+8378443-1

** Affects: xserver-xorg-input-synaptics (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: apport-bug i386 oneiric regression-update running-unity ubuntu

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https://bugs.launchpad.net/bugs/941572

Title:
  Toshiba NB550D touchpad does not work

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