[ubuntu] Trouble installing on Sony Vaio pcg-r505jl

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http://ubuntuforums.org – I am trying to repurpose my old Sony Vaio and am attempting to install the latest Ubuntu on it. I have run into a number of issues and have sneaked by them all so far, but am running into a snag now. I have the minimalist install on a CD. It boots successfully from that to the Installer Boot Menu. When I select "Install" or "Command Line Install" it hangs indefinitely until I restart the machine. I was able to launch the expert install, but haven't done one before. Any ideas? (Hardware)