I've been messing around all day trying do dual-boot Ubuntu 15.04 64-bit on my Dell XPS 12-9Q33 running Windows 10. I'm running into roadblocks everywhere however, so I thought I'd see if anyone with knowledge about these sorts of things had any advice for me!
Anyway, here are the steps I've taken so far:
Shrunk my Windows partition
Created a bootable USB with Ubuntu 15.04 64bit using the Universal USB Installer.
Disabled hibernation entirely, presumably disabling Fast Boot.
Disabled Secure Boot
Tried with 2 different USB sticks, in both USB ports
No matter what I try, I just can't get my computer to recognize that there is a bootable USB available! This is in UEFI mode, of course - switching to legacy mode immediately lets the computer recognize the bootable USB, but will presumably create problems with the bootloader.
The only two boot options available in the setup/BIOS are 'Windows [something or other, I forget exactly]' and 'UEFI OS'. Selecting either of those options boots to Windows.
So, any ideas? Thanks so much for your time!