Keyboard input not working at boot

Hello --
I don't get keyboard input for ~30 seconds at boot, and I'm not sure why. I'm using a hand-rolled kernel with no initrd, though when I use the stock Arch kernel with initrd it does the same thing. According to my kernel logs, the keyboard is recognized before the root filesystem is mounted (and it appears to be PS2, not USB), and from reading the rc scripts, little or nothing happens after the ttys are started.
udev starts before the root fs is mounted, and when root is fscked at boot, I don't encounter this problem. Therefore I think udev is at fault. Via I can't find any information on telling udev to deal with the keyboard earlier.
Any ideas on how to fix this? Other than putting "sleep 30" in my rc scripts, that is.

Sorry, I wasn't being very clear.
I'm using a laptop, and lsusb doesn't report anything except the buses themselves. Therefore I concluded that my keyboard is not a USB keyboard, as I mentioned above.
This is booting to a tty console, not to X, so it can't be a KDE issue. And I have full control of my keyboard with GRUB; it's just the kernel that hesitates to acknowledge its existence.

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