When I did the install of grml on a Dell Latitude c-800 laptop I didn't have it connected to a network. On install completion and reboot, the laptop puts out two short high beeps as it starts up. It could be no operating system was found. I tried installing to mbr for boot manager maybe wrong choice. Earlier I couldn't get up and down arrow keys to work but last night I held down the capslock and hit the up and down arrows and speakup did seem to move up and down menu choices. I didn't figure out how to get focus onto current selection once one of these choices was highlighted but the rest appeared to work. If I come up with no operating system and no speech tonight, I'll do a reinstall with a live network connection to see if that will make any useful difference.