Screen blinks/flashes/flickers on boot, can't even login to shell

Bug #1367732 reported by SWAPNANIL SAHA on 2014-09-10
This bug affects 1 person
Affects Status Importance Assigned to Milestone
lightdm (Ubuntu)

Bug Description

Ubuntu 14.04; grub 2; lightdm; fglrx; gnome metacity
After booting, during the login prompt(but it does not appear), the screen goes black and reappears(gray color, blank), and this doesn't stop.
when booting in recovery mode, it doesn't happen.

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: lightdm 1.10.1-0ubuntu1
ProcVersionSignature: Ubuntu 3.13.0-35.62-generic
Uname: Linux 3.13.0-35-generic x86_64
ApportVersion: 2.14.1-0ubuntu3.3
Architecture: amd64
CurrentDesktop: Unity
Date: Wed Sep 10 17:56:19 2014
InstallationDate: Installed on 2014-07-23 (48 days ago)
InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140417)
SourcePackage: lightdm
UpgradeStatus: No upgrade log present (probably fresh install)

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