new installation of 12.04 will not boot. [sbd] asking for cache data failed

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http://askubuntu.com – BACKGROUND: I have been trying live USB versions of Ubuntu on my "Dell inspiron mini" for several years. None of the previous versions were able to detect the high resolution screen (1366x768). Finally version 12.04 was able to detect the screen properly so i went ahead with the installation. I am relatively new to linux so I accepted all the defaults during installation (dual boot with Windows XP) and it seemed to go well. Problem: After rebooting and choosing "Ubuntu, with Linux 3.2.0-31-generic-pea" from the GNU GRUB boot menu i get the following and ubuntu will not continue booting: * St (HowTos)