Yousry Abdallah, this bug was reported a while ago and there hasn't been
any activity in it recently. We were wondering if this is still an
issue? If so, could you please test for this with the latest development
release of Ubuntu? ISO images are available from
http://cdimage.ubuntu.com/daily-live/current/ .

If it remains an issue, could you please run the following command in
the development release from a Terminal
(Applications->Accessories->Terminal), as it will automatically gather
and attach updated debug information to this report:

apport-collect -p xorg REPLACE-WITH-BUG-NUMBER

Thank you for your understanding.

Helpful bug reporting tips:
https://wiki.ubuntu.com/ReportingBugs

** Changed in: xorg (Ubuntu)
   Importance: Undecided => Low

** Changed in: xorg (Ubuntu)
       Status: New => Incomplete

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https://bugs.launchpad.net/bugs/1249735

Title:
  Device 045e:0772 causes low-graphics mode error

Status in “xorg” package in Ubuntu:
  Incomplete

Bug description:
  If you have a MS HD Webcam (cinema/studio) connected during boot, the
  startup time considerably slows down and halts in a low-graphics mode
  error with a complete system freeze.

  This error occurs *after* a properitary graphic driver was installed
  (tested with AMD and Nvidia).

  With a disconnected webcam the system boots without a problem.

  This bug *does not occure on* non-debian based distributions like
  arch-linux.

  Workaround:  Quickly open a console during boot and restart lightdm.

  Further informations:

  1. latest 13.10 all updates

  lsb_release -rd
  Description:  Ubuntu 13.10
  Release:      13.10

  2. apt-cache policy lightdm
  lightdm:
    Installiert:           1.8.4-0ubuntu1
    Installationskandidat: 1.8.4-0ubuntu1
    Versionstabelle:
   *** 1.8.4-0ubuntu1 0
          500 http://archive.ubuntu.com/ubuntu/ saucy-updates/main amd64 
Packages
          500 http://archive.ubuntu.com/ubuntu/ saucy-security/main amd64 
Packages
          100 /var/lib/dpkg/status
       1.8.2-0ubuntu1 0
          500 http://archive.ubuntu.com/ubuntu/ saucy/main amd64 Packages

  uvccapture:
    Installiert:           (keine)
    Installationskandidat: 0.5-2
    Versionstabelle:
       0.5-2 0
          500 http://archive.ubuntu.com/ubuntu/ saucy/universe amd64 Packages

  ProblemType: Bug
  DistroRelease: Ubuntu 13.10
  Package: lightdm 1.8.4-0ubuntu1
  ProcVersionSignature: Ubuntu 3.11.0-13.20-generic 3.11.6
  Uname: Linux 3.11.0-13-generic x86_64
  NonfreeKernelModules: fglrx
  ApportVersion: 2.12.5-0ubuntu2.1
  Architecture: amd64
  Date: Sun Nov 10 08:20:50 2013
  InstallationDate: Installed on 2013-11-08 (1 days ago)
  InstallationMedia: Ubuntu 13.10 "Saucy Salamander" - Release amd64 
(20131016.1)
  MarkForUpload: True
  SourcePackage: lightdm
  UpgradeStatus: No upgrade log present (probably fresh install)

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