I have created Ubuntu 12.10-amd64 bootable usb disk. It boots but when I select "Install on harddisk" or "Run without install", it just stops at the splash screen. I tried -nomodeset, but same thing happens. I removed "splash" from command line. The setup stops at "Stopping save kernel messages". Does this have to do anything with ATI graphics? I've ATI 4000x series.