[ubuntu] Reboot during install of Ubuntu 12.10 64-bits

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http://ubuntuforums.org – Hello. I'm relatively new to Linux, and I'm trying to install Ubuntu 12.10 64-bits on a HP G72 laptop in dualboot alongside Windows 7 64-bits. To do it, I'm using a USB key, which I used to install Ubuntu on two other computers (an Asus and a Sony). I first had a black screen after booting off the key, which I solved by using the nomodeset option. However, when I click on the "Next" button during the step where one can choose to install Ubuntu along Windows, the installation immediately stops, and this screen is displayed before the computer reboots. [spoiler][IMG]http://image.no (Hardware)