Ubuntu – Gave up waiting for root device on Ubuntu


I've just installed Ubuntu 12.10 to dual boot with Windows 8, but every time I choose Ubuntu from grub menu, it always get stuck at this error and won't boot:

Gave up waiting for root device. Common problems:
 - Boot args (cat /proc/cmdline)
   - Check rootdelay= (did the system wait long enough?)
   - Check root= (did the system wait for the right device?)
 - Missing modules (cat /proc/modules; ls /dev)
ALERT! /dev/disk/by-uuid/920903aa-762f-40d2-8126-87f4b0e6f975 does not exist. Dropping to a shell!

BusyBox v1.19.3 (Ubuntu 1:1.10.3-7ubuntu1.1) built-in shell (ash)
Enter 'help' for a lost of built-in commands.

I tried with boot-repair, but it doesn't help, here is the log generated it.

Best Answer

I had the very same problem. Thing is that I had the laptop off for long time and when I switched it on it showed the same message. Apparently some configurations changed (most likely to a default setting) with the machine off for long time.

I solved it following this link here on Stack Exchange:

"initramfs" error on boot ONLY on Dell XPS 13 (boots fine on other computer)

Solution is:

  • Reboot.
  • Press F12 and go to the BIOS settings.
  • System Configurations → SATA Operations
  • Change RAID to AHCI
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