dual-boot: OpenBSD & Trisquel

dare mas datos del problema, los que pude recolectar claro. primero, la configuracion actual de mi GRUB:

# GRUB2 configuration file '/boot/grub/grub.cfg'.
# generated by 'grub2config'. Wed 10 Nov 2010 02:07:24 PM UTC
#
# The backup copy of the MBR for drive '/dev/sda' is
# here '/boot/grub/mbr.sda.3737'. You can restore it like this.
# dd if=mbr.sda.3737 of=/dev/sda bs=512 count=1
#
# Start GRUB2 global section
#set timeout=30
set menu_color_normal=light-gray/blue
set menu_color_highlight=black/light-gray
# End GRUB2 global section
# Linux bootable partition config begins
menuentry "Trisquel 4.0 1 on (/dev/sda1)" {
set root=(hd0,1)
linux /vmlinuz root=/dev/sda1 ro vga=normal
}
# Linux bootable partition config ends
# Linux bootable partition config begins
menuentry "Trisquel 4.0 2 on (/dev/sda2)" {
set root=(hd0,2)
linux /vmlinuz root=/dev/sda2 ro vga=normal
}
# Linux bootable partition config ends
# Other bootable partition config begins
menuentry "OpenBSD on (/dev/sda4)" {
set root=(hd0,4)
chainloader +1
}
# Other bootable partition config ends

ok, ahora, este es el mensaje de error que aparece cuando intento arrancar alguna particion con GNU/Linux Trisquel instalado:

[...]
[1.494357] VFS: Cannot open root device "sda2" or unknown-block(0,0)
[1.494436] Please append a correct "root=" boot option; here are the available partitions:
[1.494543] Kernel panic - not syncing: VSF: Unable to mount root fs on unknown-block(0,0)
[1.494648] Pid: 1, comm: Swapper Not tainted 2.6.32-25-generic #45trisquel1
[...]

alguna ayuda? :(

IGNOREN ESTE MENSAJE, YA LO RESOLVI!! :D

pronto posteare como!