I've been encountering a problem while attempting to boot into Ubuntu GNOME via a bootable USB. The motherboard I am using is a ASUS Z97 Deluxe, and I have configured the secure boot setting in the BIOS to "Other OS".
This is the error I am receiving:
More details: - I've tried using UNetbootin and Rufus - I am booting from the USB in UEFI mode
Some PC specifications: Motherboard: ASUS Z97 Deluxe CPU: Intel Core i7-4790K LGA1150 GPU: ASUS GTX 780Ti SSD: Samsung 840EVO x1
Changing something shouldn't be required at this point. As you can see in Screenshot, the Kernel is already loaded, and now trys to access a drive. If I'd had to take a guess, you're trying to repair a drive? Last time I saw this error, I was. Turned out to not even be the boot drive, but a cable failure in another(The drive in question, an old Samsung 2.5" HDD runs great to date, only the cable gave up on me :O). Try removing your main SSD temporarily from the System. Also, it might be that the USB-Stick you're using is faulty/doesn't quite comply with SCSI standarts. Try anotherone if you can! If you've plugged in your Stick in a Front-Panel connector, try the Backpanel, as USB-extensions sometimes create problems. Also, make sure that the USB-Stick you're using doesn't takes to much power. If you plugged in a USB3 port, plug it in a 2.0 port, and vice versa(USB3 delivers more power, but might have driver issues) If all that doesn't help, try changing up the BIOS/UEFI settings for USB(For example, the USB Legacy mode, or Quickcharge-Things). Also, have you tried to just wait a few minutes? AFAIK, if Linux can't mount a drive in 1,5min, it just skips it. Maybe it's the same with ATA-Devices :D