Integrated webcam isnt working at all ubuntu 14.04 x64

Question

i've recently installed Ubuntu 14.04 LTS x64 and cheese isn't working also skype they're recognizing the camera but it shows an error on playing from it

i tried solutions here , here and here and also no one worked for me
i have the file /dev/video0 and i tried

sudo chmod 777 /dev/video*

and

vlc v4l2:////dev//video0

but that's didnt work neither ,
also i tried to install guvcview but also didnt work

the output of dmesg is here , and the output of lsusb is here
and also it was working at initial install

any thoughts please ?

Solution

Install the Webcam driver packages :

sudo apt-get install build-essential linux-headers-`uname -r`

If already installed them, reconfigure them:

sudo dpkg-reconfigure -phigh build-essential linux-headers-`uname -r`

Comments

[Waqas]

its already installed, and gives the error on second commnad Examining /etc/kernel/header_postinst.d. run-parts: executing /etc/kernel/header_postinst.d/dkms 3.13.0-53-generic /boot/vmlinuz-3.13.0-53-generic Error! Could not locate dkms.conf file. File: does not exist.