[求助]FC5 GRUB不自动引导系统

ttttt_hmg

我的GRUB不进行自动引导系统，并不倒计时。
GRUB配置如下:
# grub.conf generated by anaconda
#
# Note that you do not have to rerun grub after making changes to this file # NOTICE: You have a /boot partition. This means that
# all kernel and initrd paths are relative to /boot/, eg.
# root (hd0,2)
# kernel /vmlinuz-version ro root=/dev/VolGroup00/LogVol00
# initrd /initrd-version.img
#boot=/dev/hda
default=5
timeout=5
splashimage=(hd0,2)/grub/splash.xpm.gz
hiddenmenu
title Fedora Core (2.6.15-1.2054_FC5)
root (hd0,2)
kernel /vmlinuz-2.6.15-1.2054_FC5 ro root=/dev/VolGroup00/LogVol00 rhgb quiet
initrd /initrd-2.6.15-1.2054_FC5.img
title Fedora Core (2.6.17-1.2187_FC5xen0)
root (hd0,2)
kernel /xen.gz-2.6.17-1.2187_FC5
module /vmlinuz-2.6.17-1.2187_FC5xen0 ro root=/dev/VolGroup00/LogVol00 rhgb quiet
module /initrd-2.6.17-1.2187_FC5xen0.img title Fedora Core (2.6.17-1.2187_FC5xen)
root (hd0,2)
kernel /xen.gz-2.6.17-1.2187_FC5-PAE
module /vmlinuz-2.6.17-1.2187_FC5xen ro root=/dev/VolGroup00/LogVol00 rhgb quiet
module /initrd-2.6.17-1.2187_FC5xen.img title Fedora Core (2.6.17-1.2187_FC5smp)
root (hd0,2)
kernel /vmlinuz-2.6.17-1.2187_FC5smp ro root=/dev/VolGroup00/LogVol00 rhgb quiet
initrd /initrd-2.6.17-1.2187_FC5smp.img title Fedora Core (2.6.17-1.2187_FC5xenU)
root (hd0,2)
kernel /vmlinuz-2.6.17-1.2187_FC5xenU ro root=/dev/VolGroup00/LogVol00 rhgb quiet
initrd /initrd-2.6.17-1.2187_FC5xenU.img title Fedora Core (2.6.17-1.2187_FC5)
root (hd0,2)
kernel /vmlinuz-2.6.17-1.2187_FC5 ro root=/dev/VolGroup00/LogVol00 rhgb quiet
initrd /initrd-2.6.17-1.2187_FC5.img
title dos
rootnoverify (hd0,0)
chainloader +1
由上可以看出，默认的时间是5秒，但是就是加载GRUB后，不进行倒计时，不知有哪位高手解答一下，帮我解决这个问题。

npcomet

使用hiddenmenu以后会隐藏grub的启动菜单