On a Dell Inspiron 8200 with Nvidia NV17 (64MB) graphics, I encountered the same problem trying to boot Ubuntu or Lubuntu Saucy (13.10) Live discs.
Entering 'help' at the boot: prompt produced a special boot menu, but below the menu there was an option to simply press Enter to boot. Doing that resulted in booting to the Live desktop *without* the usual two menu screens where I choose my Language and then choose to Try *buntu Without Installing.
On a Dell Inspiron 8200 with Nvidia NV17 (64MB) graphics, I encountered the same problem trying to boot Ubuntu or Lubuntu Saucy (13.10) Live discs.
Entering 'help' at the boot: prompt produced a special boot menu, but below the menu there was an option to simply press Enter to boot. Doing that resulted in booting to the Live desktop *without* the usual two menu screens where I choose my Language and then choose to Try *buntu Without Installing.