Good news! I finally fixed the CloudBook. Indeed as some of the users suggested, there was a way to restore the original video settings by copying a configuration file. This is basic Linux 101 to those who use Ubuntu a lot, but I, like many potential CloudBook users, am a Linux newbie. To restore the configuration file, I hit ESC at boot time and was given a menu (from Grub boot manager) which allowed me to select “recovery mode.” Unlike Windows, recovery mode in Linux, at least in gOS, is not graphical. You get a command prompt. Fortunately, I know a few basic unix/linux commands so once I knew that the config file was a file called xorg.conf which is located in the /etc/X11 directory, I simply typed cd /etc/X11 at the command prompt. I then entered ls -l to see what files were in the /etc/X11 directory. As I hoped, there was a backup copy of the xorg.conf file which was named xorg.conf.1. I entered cp xorg.conf.1 xorg.conf to copy the original xorg.conf over the dysfunctional one. It worked!