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[Bug 1562155] Re: Touchpad stopped functioning after kernel update for Dell Chromebook "Candy"


Would it be possible for you to test the latest upstream kernel? Refer
to https://wiki.ubuntu.com/KernelMainlineBuilds . Please test the latest
v4.5 kernel[0].

If this bug is fixed in the mainline kernel, please add the following
tag 'kernel-fixed-upstream'.

If the mainline kernel does not fix this bug, please add the tag:

Once testing of the upstream kernel is complete, please mark this bug as

Thanks in advance.

[0] http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.5-wily/

** Changed in: linux (Ubuntu)
   Importance: Undecided => Medium

** Changed in: linux (Ubuntu)
       Status: Confirmed => Incomplete

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  Touchpad stopped functioning after kernel update for Dell Chromebook

Status in linux package in Ubuntu:

Bug description:
  Upon successful installation of Ubuntu 15.10, I ran the usual updates
  and after restarting, the touchpad stopped working.

  I booted into kernel version 4.2.0-16 instead of the updated kernel
  4.2.0-34, and the touchpad that had stopped working functioned as
  usual once more. Changing back into the latest kernel disabled the
  touchpad once more.

  I am installing Ubuntu on the Dell Chromebook 11 "Candy" running Intel
  Celeron(R) CPU N2840 (Baytrail) processor. This deployment is being
  used for several lab machines of the same model.

  Steps to reproduce:

  1. Install Ubuntu 15.10.
  2. Run update.


  1. All hardware to work prior to update.


  1. Touchpad stopped working.

  ProblemType: Bug
  DistroRelease: Ubuntu 15.10
  Package: linux-image-4.2.0-34-generic 4.2.0-34.39
  ProcVersionSignature: Ubuntu 4.2.0-34.39-generic 4.2.8-ckt4
  Uname: Linux 4.2.0-34-generic x86_64
  ApportVersion: 2.19.1-0ubuntu5
  Architecture: amd64
   /dev/snd/controlC1:  unllife121l    980 F.... pulseaudio
  Date: Fri Mar 25 15:33:10 2016
  HibernationDevice: RESUME=UUID=44e6cef0-6fe7-4afe-a5f9-0a8d60224b28
  InstallationDate: Installed on 2016-03-24 (0 days ago)
  InstallationMedia: Ubuntu-MATE 15.10 "Wily Werewolf" - Release amd64 (20151021)
  MachineType: GOOGLE Candy
   PATH=(custom, no user)
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.2.0-34-generic root=UUID=a7c1001c-8167-4541-b62e-e2cf805003d8 ro quiet splash vt.handoff=7
  PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: No PulseAudio daemon running, or not running as session daemon.
   linux-restricted-modules-4.2.0-34-generic N/A
   linux-backports-modules-4.2.0-34-generic  N/A
   linux-firmware                            1.149.3
  SourcePackage: linux
  UdevLog: Error: [Errno 2] No such file or directory: '/var/log/udev'
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 11/20/2014
  dmi.bios.vendor: coreboot
  dmi.chassis.type: 3
  dmi.chassis.vendor: GOOGLE
  dmi.modalias: dmi:bvncoreboot:bvr:bd11/20/2014:svnGOOGLE:pnCandy:pvr1.0:cvnGOOGLE:ct3:cvr:
  dmi.product.name: Candy
  dmi.product.version: 1.0
  dmi.sys.vendor: GOOGLE

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