The case: Ubuntu 11.04 (Gnome 2 FTW) and newer fail to install on fakeraids. It’s even worse, setup claims to have installed everything correctly yet no system boots upon reset.
Here’s a what fixed it for me:
1) Run LiveCD, choose Try Ubuntu, run installer, don’t reboot after install.
2) CTRL-ALT-T (open terminal)
sudo mount --bind /dev /target/dev sudo mount --bind /proc /target/proc
3) Chroot into installed Ubuntu
sudo chroot /target dpkg-reconfigure grub-pc
