I have used Ubuntu 12.04 for several months. Suddenly, today it would not start, but hangs up on a blank screen with the horizontal line cursor blinking in the upper left hand corner of the screen. I think it might have something to do with the mounting point of the home drive being wrong. I restarted U using a 12.04 live CD and it started OK, but not sure what to do to debug the problem. I considered reinstalling the OS from the live CD, but an error message: UBI - prepare failed with an exit code 126. Searching on the forum did not explain much about what this means. As a newbie, I Need HELP badly. My son has advised me to NOT reinstall the OS.