[ubuntu] Sony Vaio Pro 13 Dual Boot Ubuntu 13.10 + Win8 - Grub2 hangs on initrd

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http://ubuntuforums.org – Hi folks, This is my first thread here and I've solved many problems with the threads stored here. But this time, I have a problem, which I can't solve following suggestions in threads of ubuntuforums. I bought a Sony Vaio Pro 13 (SVP1321C5E) last week with Win8 pre-installed. It has an EFI partition on it and a pre-installed Win8 partition, as well as a recovery partition and a SonyCare partition (it's like the recovery of the recovery partition) I wanted to install ubuntu 13.10 alongside my Win8 (I want to keep it because my laptop is too new for Win7 since there are no drivers available (Hardware)