I am trying to Install Ubuntu 12.04 on my ASUS u36j, right after I choose "Install Ubuntu" the screen just went blank and with no response. My take is that it's stuck on checking Disk for defects.
I tried several times the problem persists, so I chose an option that allows me to do advanced installing and I saw that the default first step is to check the disk for defects. So next time I choose check disk for defects when prompted and the same problem persists, that's how I concluded that it's stuck.
I changed the factory hardrive to a SSD, I tried in my desktop which also uses SSD and it worked.