Unable to enter Linux from boot menu - keyboard unresponsive
I am running Ubuntu Linux and Windows XP dual-boot (would go completely Linux, but my Blackberry won't back up to it).
XP is first on the boot menu. When the boot menu comes up, it will not accept input from the keyboard, so the first item on the menu ends up booting. I've checked the batteries in my wireless keyboard, tried using a ps2 keyboard, even checked the bios to be sure it is loading the keyboard drivers before the boot menu. I can use the keyboard to move about in the bios, but once the boot menu comes up ... nothing.
I used to be able to move with the arrow keys to whichever system I wanted to boot to. Any ideas what can be causing this and how to reset it?