Installed linux kernel 4.8.0-34-generic (4.8.0-34.36) and
4.8.0-34-lowlatency (4.8.0-34.36) on E555.

Webcam works smoothly under 4.8.0-34-lowlatency (4.8.0-34.36);
Webcam can not work under 4.8.0-34-generic (4.8.0-34.36).

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https://bugs.launchpad.net/bugs/1433906

Title:
  Acer, Inc ID 5986:055a is useless after 14.04.2 installed.

Status in HWE Next:
  Won't Fix
Status in linux package in Ubuntu:
  Fix Committed
Status in linux-lts-vivid package in Ubuntu:
  Triaged
Status in linux-lts-xenial package in Ubuntu:
  Triaged
Status in linux source package in Xenial:
  Fix Committed
Status in linux source package in Yakkety:
  Fix Committed
Status in linux-lts-vivid source package in Yakkety:
  New
Status in linux-lts-xenial source package in Yakkety:
  New
Status in linux package in Arch Linux:
  New
Status in Fedora:
  Unknown

Bug description:
  CID : 201411-16166 Lenovo E450 (I+A) with 14.04.2 (utopic)
  CID : 201408-15472 Lenovo E555 (A+A) with 14.04.2 (utopic)

  Steps:
  1. Install 14.04.2 on E450 or E555.
  2. Log in system and open a terminal.
  3. $ gst-launch-0.10 v4l2src ! xvimagesink

  Expected result:
  Camara is activated

  Actual result:
  $  gst-launch-0.10 v4l2src ! xvimagesink
  Setting pipeline to PAUSED ...
  ERROR: Pipeline doesn't want to pause.
  ERROR: from element /GstPipeline:pipeline0/GstV4l2Src:v4l2src0: Cannot 
identify device '/dev/video0'.
  Additional debug info:
  v4l2_calls.c(497): gst_v4l2_open (): 
/GstPipeline:pipeline0/GstV4l2Src:v4l2src0:
  system error: No such file or directory
  Setting pipeline to NULL ...
  Freeing pipeline ...

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: linux-image-3.16.0-30-generic 3.16.0-30.40~14.04.1 [modified: 
boot/vmlinuz-3.16.0-30-generic]
  ProcVersionSignature: Ubuntu 3.16.0-30.40~14.04.1-generic 3.16.7-ckt3
  Uname: Linux 3.16.0-30-generic x86_64
  NonfreeKernelModules: fglrx
  ApportVersion: 2.14.1-0ubuntu3.7
  Architecture: amd64
  CurrentDesktop: Unity
  Date: Thu Mar 19 02:21:31 2015
  InstallationDate: Installed on 2015-03-16 (2 days ago)
  InstallationMedia: Ubuntu 14.04.2 LTS "Trusty Tahr" - Release amd64 
(20150218.1)
  SourcePackage: linux-lts-utopic
  UpgradeStatus: No upgrade log present (probably fresh install)

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