if you are using an initrd without udev hook, mounting of additional lvm partitions will fail during boot. Add udev to your hooks and rebuild initrd.
Display manager fails to load with fast SSD
I was having a problem with my display manager (lxdm) not loading on my laptop, which has a Sandisk Extreme SSD. Xorg.log would show errors like "No screens found."
I eventually figured out that the problem was that my computer was booting so fast that KMS didn't have enough time to kick in before X was started. I solved by adding the KMS driver (i915 in my case) to the initramfs.