I installed Ubuntu Gnome 16.04 LTS on my pen-drive (32 GB USB 3.0), using this installation procedure. When I try to boot from that pen-drive, the selection screen appears. I select the normal Ubuntu to boot, then I get the following error message:
xhci_hcd 0000:00:14.0: Command completion event does not match command
usb 2-7: hub failed to enable device, error -62
usb 3-1: device not accepting address 2, error -62
xhci_hcd 0000:00:14.0: Command completion event does not match command
usb 3-1: device not accepting address 3, error -62
Gave up waiting for root device. Common problems:
-Boot args(cat/proc/cmdline)
-Check rootdelay=( did system wait long enough?)
-Check root=(did systemwait for the right device?)
-Missing modules (cat /proc/modules; Is /dev)
ALERT! UUID=-------------------------- does not exist. Dropping to a shell!
Busybox v1.22.1 (Ubuntu 1:1.22.0-15ubuntu1) built-in shell(ash)
enter 'help' for a list of built in commands.
(initramfs)
I also tried installing Ubuntu gnome 15.10, 14.04 AMD Ubuntu unity 15.10 and still got the same error. I tried on a different laptop and am still getting the same error. Installing and running Ubuntu on a pen-drive is my only option as my laptop has only SSD and I can't dual boot it with windows.