Re: No Root File System Found
When you're using the manual partitioning, what mount points are you specifying? You must, at the very least, have one partition with the mount point set to /
I don't know about how things work with EFI, but if you haven't told Ubuntu which partition you want to use as the main system partition (/) it will give you the "no root file system defined" error message. So click the Edit button on that partition and set the mount point to /
I try to treat the cause, not the symptom. I avoid the terminal in instructions, unless it's easier or necessary. My instructions will work within the Ubuntu system, instead of breaking or subverting it. Those are the three guarantees to the helpee.