Black Screen after 12.04 Installation

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http://askubuntu.com – I have installed Ubuntu 12.04 (64bit) on a new Windows 8 Sony laptop that I have bought recently. When I attempt to boot Ubuntu all that appears is a black screen with a single coloured line across the top. Could this be the result of some incompatibility with the system graphics card, AMD Radeon HD 7650M 1GB? How do I solve this? Thanks you for any help. (HowTos)