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This morning I installed an update for Ubuntu 13.10.  The update log
yields:

Start-Date: 2014-01-04  11:43:41
Commandline: aptdaemon role='role-commit-packages' sender=':1.71'
Install: linux-headers-3.11.0-15-generic:i386 (3.11.0-15.23), linux-image-3.11.0-15-generic:i386 (3.11.0-15.23), linux-headers-3.11.0-15:i386 (3.11.0-15.23), linux-image-extra-3.11.0-15-generic:i386 (3.11.0-15.23)
Upgrade: apport-gtk:i386 (2.12.5-0ubuntu2.1, 2.12.5-0ubuntu2.2), systemd-shim:i386 (4-0ubuntu0.13.10, 6-0ubuntu0.13.10), linux:i386 (3.11.0.14.15, 3.11.0.15.16), apport:i386 (2.12.5-0ubuntu2.1, 2.12.5-0ubuntu2.2), linux-generic:i386 (3.11.0.14.15, 3.11.0.15.16), libgnome-desktop-3-7:i386 (3.8.4-0ubuntu1, 3.8.4-0ubuntu1.1), linux-libc-dev:i386 (3.11.0-14.21, 3.11.0-15.23), python3-apport:i386 (2.12.5-0ubuntu2.1, 2.12.5-0ubuntu2.2), linux-image-generic:i386 (3.11.0.14.15, 3.11.0.15.16), linux-headers-generic:i386 (3.11.0.14.15, 3.11.0.15.16), python3-problem-report:i386 (2.12.5-0ubuntu2.1, 2.12.5-0ubuntu2.2), gnome-desktop3-data:i386 (3.8.4-0ubuntu1, 3.8.4-0ubuntu1.1)
End-Date: 2014-01-04  11:45:17

After the update, my trackpad is no longer detected during startup.  I
have checked the kernel log, before the update, I see

Dec 30 20:23:04 chrubuntu kernel: [    4.217061] input: Cypress APA
Trackpad (cyapa) as
/devices/pci0000:00/0000:00:15.1/i2c-8/8-0067/input/input13

After the update, this line no longer appears and my trackpad does not
function.

ProblemType: Bug
DistroRelease: Ubuntu 13.10
Package: xserver-xorg-input-synaptics 1.7.1-0ubuntu1
ProcVersionSignature: Ubuntu 3.11.0-15.23-generic 3.11.10
Uname: Linux 3.11.0-15-generic i686
ApportVersion: 2.12.5-0ubuntu2.2
Architecture: i386
Date: Sat Jan  4 12:19:22 2014
DistUpgraded: Fresh install
DistroCodename: saucy
DistroVariant: ubuntu
MachineType: Acer Peppy
MarkForUpload: True
ProcEnviron:
 TERM=xterm
 PATH=(custom, no username)
 XDG_RUNTIME_DIR=<set>
 SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.11.0-15-generic root=UUID=b9a17ad6-247f-48ac-b2c2-d3c0192550ef ro quiet splash vt.handoff=7
SourcePackage: xserver-xorg-input-synaptics
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 10/29/2013
dmi.bios.vendor: coreboot
dmi.chassis.type: 3
dmi.chassis.vendor: Acer
dmi.modalias: dmi:bvncoreboot:bvr:bd10/29/2013:svnAcer:pnPeppy:pvr1.0:cvnAcer:ct3:cvr:
dmi.product.name: Peppy
dmi.product.version: 1.0
dmi.sys.vendor: Acer
version.compiz: compiz 1:0.9.10+13.10.20131011-0ubuntu1
version.libdrm2: libdrm2 2.4.46-1ubuntu1
version.libgl1-mesa-dri: libgl1-mesa-dri 9.2.1-1ubuntu3
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 9.2.1-1ubuntu3
version.xserver-xorg-core: xserver-xorg-core 2:1.14.3-3ubuntu2
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.7.3-0ubuntu3.1
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.2.0-0ubuntu10
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.904-0ubuntu2
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.9-2ubuntu1
xserver.bootTime: Sat Jan  4 11:51:52 2014
xserver.configfile: default
xserver.errors:
 
xserver.logfile: /var/log/Xorg.0.log
xserver.outputs:
 product id                                4402 
 vendor                                     CMN
xserver.version: 2:1.14.3-3ubuntu2

** Affects: linux (Ubuntu)
     Importance: High
         Status: Incomplete


** Tags: apport-bug i386 saucy ubuntu
-- 
Acer C720 touchpad (trackpad) no longer detected after update
https://bugs.launchpad.net/bugs/1266076
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