hy, excuse me for my english
i have done exactly the same things "installed Fedora (12) without bootloader, started Ubuntu, and then run the "10_linux" script followed by the "sudo update-grub" command. Then Grub 2 just find the distro automatically!"
but when i open the pc and boot fedora it blocks and the following script comes out:
VFS: cannot open root device "sda3" or unknown-block (0,0)
please append a correct "root" boot option; here are the available partition:
kernel panic - not syncing: VFS: unable to mount root fs on unknown-block (0,0)
Pid: 1, comm: swapper not tainted 188.8.131.52 - 127 .fc12.i686 #1
[<c0764636>] ? printk+0x14/0x16
[<c0764580>] panic + 0x3e/0xe0
[<c0409c9c>] ? sys_mknod + 0x18/0x1a
[<c0989d0f>] mount_root + 0x4c/0x54
[<c0989e5c>] prepare _namespace + 0x145/0x16c
[<c09891d6>] ? kernel_init + 0x0/0x1ed
my fstab seems to be set correctly
i thought that this problem was caused by the fact that i have not installed the bootloader in a separate partition how this thread explain: http://forums.fedoraforum.org/showthread.php?t=223206
but if your fedora works there shuld be another problem...
if you can gelp me or someone can help me i would be grateful!