I'm trying to stop the U-Boot startup but seems not working! I'm also confused by forum since I cannot understan wich is the right command to stop the boot process. In forums here: 1) Press Any key to stop the boot: 1 2 3 ... ----> Not work 2) Press any key to stop the boot process ----> Not work 3) on joshua blog. Press 'enter' key when boot logo appears. ---> Not work Have pressed keys when boot-Up logo appears and/or during startup, same results. Pressing the keys above will always result in a normal bootup process. It's possible to know how to stop the BootUp process correctly? Udoo-Quad, Ubuntu ubuntu1204_v2.1 img. Just for clarify, I'm using a wireless keyboard since I don't have a wired one. Maybe the wireless keyboard it's recognized after boot? [update] No. Connected a wired keyboard, same results!