Can't boot 2.6.27-r5 on HP 6910p - New Install

[ausmusj1]

Hello All-

I'm very sure that I'm just missing something (most likely something obvious), but I'm tearing my hair out on this. I have an HP 6910p laptop that I'm installing Gentoo on. The AMD64 2008-r1 minimal CD boots fine, and finds the SATA hard drive (in AHCI mode) just fine. I've gone in, configured and compiled my kernel with AHCI SATA support built-in and ext3 support built in, but when I boot into my new kernel, I always get a "Cannot find root partition" kernel panic. I've tried all the root=/dev/sdX4 combinations up to sdd4 (the drive shows up as sda in the CD boot) to make sure it wasn't just a wandering drive letter. I've also booted the CD and grabbed the /dev/sda4 UUID, and configured LILO to append "root=/dev/disk/by-uuid/${UUID}" to the kernel, but it still cannot find my hard drive. I'm about to install a 2.6.25 kernel to reproduce the boot CD environment, but there's just got to be something I'm missing and have screwed up that's doing this...

Any thoughts?

Thanks!
-James
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