Acer C720 touchpad (trackpad) no longer detected after update

[Arthur Goldman]

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

[penalvch (penalvch)]

Arthur Goldman, thank you for reporting this and helping make Ubuntu better. If you boot into a kernel prior to the proposed repository kernel 3.11.0-15.23 does the trackpad begin to work again?

[Arthur Goldman (annoyedalchemist)]

My system is small enough that I don't keep old kernels and I was unable
to convince Synaptic to force an old version, so I don't know. I ended
up reinstalling Ubuntu using the Haswell Chromebook script
http://chromeos-cr48.blogspot.com/2013/10/chrubuntu-for-new-chromebooks-now-with.html
which gave 3.11.0.15.16 according to Synaptic and the Software Center,
and the touchpad worked fine after that, but I don't know if that's the
older kernel, and Synaptic and the Software Center list that as the
latest, or if it's the special install.

Really sorry I couldn't be of more help.

On 01/10/2014 12:35 PM, Christopher M. Penalver wrote:
> Arthur Goldman, thank you for reporting this and helping make Ubuntu
> better. If you boot into a kernel prior to the proposed repository
> kernel 3.11.0-15.23 does the trackpad begin to work again?
>
> ** Changed in: xserver-xorg-input-synaptics (Ubuntu)
> Importance: Undecided => Low
>
> ** Changed in: xserver-xorg-input-synaptics (Ubuntu)
> Status: New => Incomplete
>
> ** Package changed: xserver-xorg-input-synaptics (Ubuntu) => linux
> (Ubuntu)
>
> ** Changed in: linux (Ubuntu)
> Importance: Low => High
>
> ** Tags added: regression-proposed
>

[penalvch (penalvch)]

Arthur Goldman, this bug report is being closed due to your last comment regarding this being fixed via a reinstall. For future reference you can manage the status of your own bugs by clicking on the current status in the yellow line and then choosing a new status in the revealed drop down box. You can learn more about bug statuses at https://wiki.ubuntu.com/Bugs/Status. Thank you again for taking the time to report this bug and helping to make Ubuntu better. Please submit any future bugs you may find.