It seems that you also have some other random HW failures (as per an IRC chat with PHLin). Is it possible that for some reason your upgrade failed and that you installed the linux-image-4.8.0-34-generic package but not the linux-image-extra-4.8.0-34-generic?
-- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux-lts-vivid in Ubuntu. 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) To manage notifications about this bug go to: https://bugs.launchpad.net/hwe-next/+bug/1433906/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
