The following packages have unmet dependencies and could not initialize package information

Question

I know that this might seem to be duplicate of other questions. But none of the answers mentioned there solved this:

• When I try to update my system using Software Updates, I get an error message saying :

  

• When I try sudo apt-get upgrade , I get this:

  vishwa@vishwa-PC:~$ sudo apt-get upgrade
  Reading package lists... Done
  Building dependency tree       
  Reading state information... Done
  You might want to run 'apt-get -f install' to correct these.
  The following packages have unmet dependencies:
   libcogl15 : Depends: libgbm1 (>= 8.1~0) but it is not installed
   libqt5gui5 : Depends: libgbm1 (>= 8.1~0) but it is not installed
  E: Unmet dependencies. Try using -f.
  

• When I run sudo apt-get -f install :

  vishwa@vishwa-PC:~$ sudo apt-get -f install
  Reading package lists... Done
  Building dependency tree       
  Reading state information... Done
  Correcting dependencies... failed.
  The following packages have unmet dependencies:
   libcogl15 : Depends: libgbm1 (>= 8.1~0) but it is not installed
   libqt5gui5 : Depends: libgbm1 (>= 8.1~0) but it is not installed
  E: Error, pkgProblemResolver::Resolve generated breaks, this may be caused by held packages.
  E: Unable to correct dependencies
  

• My Software-Properties-gtk looks like this :

  

All answers are welcome. Please help me here.

EDIT : @Raphael , - Out put of mkdir ~/Downloads/tmp; cd ~/Downloads/tmp; wget -c http://kr.archive.ubuntu.com/ubuntu/pool/main/m/mesa/libgbm1_10.1.0-4ubuntu5_amd‌​64.deb; sudo dpkg -i *.deb; rm -rf ~/Downloads/tmp :

  --2016-01-20 22:06:42--  http://kr.archive.ubuntu.com/ubuntu/pool/main/m/mesa/libgbm1_10.1.0-4ubuntu5_amd%E2%80%8C%E2%80%8B64.deb
Resolving kr.archive.ubuntu.com (kr.archive.ubuntu.com)... 103.22.220.133
Connecting to kr.archive.ubuntu.com (kr.archive.ubuntu.com)|103.22.220.133|:80... connected.
HTTP request sent, awaiting response... 404 Not Found
2016-01-20 22:06:43 ERROR 404: Not Found.

--2016-01-20 22:06:43--  http://kr.archive.ubuntu.com/ubuntu/pool/main/m/mesa/libgbm1_10.1.0-4ubuntu5_amd%E2%80%8C%E2%80%8B64.deb
Reusing existing connection to kr.archive.ubuntu.com:80.
HTTP request sent, awaiting response... 404 Not Found
2016-01-20 22:06:43 ERROR 404: Not Found.

dpkg: error processing archive *.deb (--install):
 cannot access archive: No such file or directory
Errors were encountered while processing:
 *.deb
vishwa@vishwa-PC:~/Downloads/tmp$ 

NOTE : I Use Ubuntu 14.04.3 LTS

• Output of apt-cache policy libgbm1 :

  vishwa@vishwa-PC:~$ apt-cache policy libgbm1 libgbm1: Installed: 10.1.0-4ubuntu5 Candidate: 11.0.4~git20151026+11.0.ec14e6f8-0ubuntu0ricotz~trusty Version table: 11.0.4~git20151026+11.0.ec14e6f8-0ubuntu0ricotz~trusty 0 500 http://ppa.launchpad.net/xorg-edgers/ppa/ubuntu/ trusty/main amd64 Packages 10.1.3-0ubuntu0.5 0 500 http://archive.ubuntu.com/ubuntu/ trusty-updates/main amd64 Packages *** 10.1.0-4ubuntu5 0 500 http://archive.ubuntu.com/ubuntu/ trusty/main amd64 Packages 100 /var/lib/dpkg/status vishwa@vishwa-PC:~$

Answer 1

So, as we have found out in our chat room that the error was being caused by a ppa - ppa:xorg-edgers/ppa and all its packages. Removing it and adding a new ppa for nvidia drivers ppa:graphics-drivers/ppa solved the issue. Glad! we worked it out.