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[Bug 1433906] Re: Acer, Inc ID 5986:055a is useless after 14.04.2 installed.


If you want to try yourself, this is what worked for me on a E550,
Ubuntu 15.10:

uname -a
# check your current kernel version, then download the same version
# note, no root!
apt-get source linux-image-extra-4.2.0-19-generic
# install packages needed to build the kernel
sudo apt-get build-dep linux-image-extra-4.2.0-19-generic
sudo apt-get install git
cd linux-4.2.0
wget -O webcam.patch https://launchpadlibrarian.net/229627414/0001-uvcvideo-Acer-Integrated-Camera-5986-055a-add-UVC_QU.patch
git apply webcam.patch

you can now change the version in debian/changelog, adding "-webcam" or
something of the like, which makes it easier to identify your kernel

DEB_BUILD_OPTIONS=parallel=4 AUTOBUILD=1 NOEXTRAS=1 fakeroot debian/rules binary-generic
# now wait until kernel is built, this takes some time
sudo dpkg -i ../linux-headers*.deb ../linux-image*.deb

Then, reboot.
You'll have to repeat this process if Ubuntu updates kernel.

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

Status in HWE Next:
  Won't Fix
Status in linux-lts-utopic package in Ubuntu:
Status in linux-lts-vivid package in Ubuntu:
Status in linux package in Arch Linux:
Status in Fedora:

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)

  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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