09-06-2011
Well.. that's not true. You only need to chainload when you need to call up a different boot loader other than grub (e.g. a windows boot loader). So.. grub CAN boot OS's from the grub shell... and if needed it can transfer control to a foreign boot loader as needed.
I think maybe we need to know a LOT more about your setup before we can know what exactly is wrong.
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GRUB(8) FSF GRUB(8)
NAME
grub - the grub shell
SYNOPSIS
grub [OPTION]...
DESCRIPTION
Enter the GRand Unified Bootloader command shell.
--batch
turn on batch mode for non-interactive use
--boot-drive=DRIVE
specify stage2 boot_drive [default=0x0]
--config-file=FILE
specify stage2 config_file [default=/boot/grub/menu.lst]
--device-map=FILE
use the device map file FILE
--help display this message and exit
--hold wait until a debugger will attach
--install-partition=PAR
specify stage2 install_partition [default=0x20000]
--no-config-file
do not use the config file
--no-curses
do not use curses
--no-floppy
do not probe any floppy drive
--no-pager
do not use internal pager
--preset-menu
use the preset menu
--probe-second-floppy
probe the second floppy drive
--read-only
do not write anything to devices
--verbose
print verbose messages
--version
print version information and exit
REPORTING BUGS
Report bugs to <bug-grub@gnu.org>.
SEE ALSO
update-grub(8), grub-install(8).
The full documentation for grub is maintained as a Texinfo manual in the grub-legacy-doc package. If the info and grub programs are prop-
erly installed at your site, the command
info grub
should give you access to the complete manual.
grub (GNU GRUB 0.97) January 2013 GRUB(8)