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开机进入grub后，只要按箭头选择，系统就死机。现在只能是等待它自动倒数完后进入linux。请问如何修复？谢谢！

贴一下你的/boot/grub/menu.lst

现进linux
用 sudo dd if=/dev/sda(有的是hda） of=grub.sec bs=512 count=1
这样生成了一个grub.sec
考到c:\下，
打开我的电脑的属性
高级那个对话框有修改启动选项的
添加c:\grub.sec=grub
并且修改时间
保存
用windows安装盘进入修复台
运行fixmbr
这样应该是可以了

# menu.lst - See: grub(8), info grub, update-grub(8)
# grub-install(8), grub-floppy(8),
# grub-md5-crypt, /usr/share/doc/grub
# and /usr/share/doc/grub-doc/.

## default num
# Set the default entry to the entry number NUM. Numbering starts from 0, and
# the entry number 0 is the default if the command is not used.
#
# You can specify 'saved' instead of a number. In this case, the default entry
# is the entry saved with the command 'savedefault'.
# WARNING: If you are using dmraid do not change this entry to 'saved' or your
# array will desync and will not let you boot your system.
default 0

## timeout sec
# Set a timeout, in SEC seconds, before automatically booting the default entry
# (normally the first entry defined).
timeout 10
gfxmenu (hd0,7)/boot/message.ububrown

## hiddenmenu
# Hides the menu by default (press ESC to see the menu)
#hiddenmenu

# Pretty colours
#color cyan/blue white/blue

## password ['--md5'] passwd
# If used in the first section of a menu file, disable all interactive editing
# control (menu entry editor and command-line) and entries protected by the
# command 'lock'
# e.g. password topsecret
# password --md5 $1$gLhU0/$aW78kHK1QfV3P2b2znUoe/
# password topsecret

#
# examples
#
# title Windows 95/98/NT/2000
# root (hd0,0)
# makeactive
# chainloader +1
#
# title Linux
# root (hd0,1)
# kernel /vmlinuz root=/dev/hda2 ro
#

#
# Put static boot stanzas before and/or after AUTOMAGIC KERNEL LIST

### BEGIN AUTOMAGIC KERNELS LIST
## lines between the AUTOMAGIC KERNELS LIST markers will be modified
## by the debian update-grub script except for the default options below

## DO NOT UNCOMMENT THEM, Just edit them to your needs

## ## Start Default Options ##
## default kernel options
## default kernel options for automagic boot options
## If you want special options for specific kernels use kopt_x_y_z
## where x.y.z is kernel version. Minor versions can be omitted.
## e.g. kopt=root=/dev/hda1 ro
## kopt_2_6_8=root=/dev/hdc1 ro
## kopt_2_6_8_2_686=root=/dev/hdc2 ro
# kopt=root=UUID=ac3b2e5b-2852-40aa-94cf-c580db81b4cd ro

## Setup crashdump menu entries
## e.g. crashdump=1
# crashdump=0

## default grub root device
## e.g. groot=(hd0,0)
# groot=(hd0,7)

## should update-grub create alternative automagic boot options
## e.g. alternative=true
## alternative=false
# alternative=true

## should update-grub lock alternative automagic boot options
## e.g. lockalternative=true
## lockalternative=false
# lockalternative=false

## additional options to use with the default boot option, but not with the
## alternatives
## e.g. defoptions=vga=791 resume=/dev/hda5
# defoptions=quiet splash locale=zh_CN

## should update-grub lock old automagic boot options
## e.g. lockold=false
## lockold=true
# lockold=false

## Xen hypervisor options to use with the default Xen boot option
# xenhopt=

## Xen Linux kernel options to use with the default Xen boot option
# xenkopt=console=tty0

## altoption boot targets option
## multiple altoptions lines are allowed
## e.g. altoptions=(extra menu suffix) extra boot options
## altoptions=(recovery) single
# altoptions=(recovery mode) single

## controls how many kernels should be put into the menu.lst
## only counts the first occurence of a kernel, not the
## alternative kernel options
## e.g. howmany=all
## howmany=7
# howmany=all

## should update-grub create memtest86 boot option
## e.g. memtest86=true
## memtest86=false
# memtest86=true

## should update-grub adjust the value of the default booted system
## can be true or false
# updatedefaultentry=false

## ## End Default Options ##

title Ubuntu, kernel 2.6.20-16-generic
root (hd0,7)
kernel /boot/vmlinuz-2.6.20-16-generic root=UUID=ac3b2e5b-2852-40aa-94cf-c580db81b4cd ro quiet splash locale=zh_CN vga=791
initrd /boot/initrd.img-2.6.20-16-generic
quiet
savedefault

title Ubuntu, kernel 2.6.20-16-generic (recovery mode)
root (hd0,7)
kernel /boot/vmlinuz-2.6.20-16-generic root=UUID=ac3b2e5b-2852-40aa-94cf-c580db81b4cd ro single
initrd /boot/initrd.img-2.6.20-16-generic

title Ubuntu, memtest86+
root (hd0,7)
kernel /boot/memtest86+.bin
quiet

### END DEBIAN AUTOMAGIC KERNELS LIST

# This is a divider, added to separate the menu items below from the Debian
# ones.
title Other operating systems:
root


# This entry automatically added by the Debian installer for a non-linux OS
# on /dev/sda1
title Microsoft Windows XP Professional
root (hd0,0)
savedefault
makeactive
chainloader +1

3楼的fixmbr方法会导致无法启动grub，也就无法启动Ubuntu了。

而且我的光盘使用不了，无法用安装盘，当初的linux是硬盘安装的

把timeout 10后面的那行用#注释掉看看怎么样。

不行，现在箭头按了秒数照样倒数，选项没有跟着改变

把你原来的menu.lst做个备份（比如menu.lst_backup），然后换成下面这个，如果变正常了，说明这个文件你改错了。如果还是原来的问题，那就用备份回复回来，等待别人解决吧，难道grub程序本身也会出问题。。。不太可能。
[/code]

我换上了以前的那个备份，但还是不行

另外，从昨晚发现问题前，我的eva就有异常：输入密码回车后，又会弹出输密码的窗口，再次输密码后才能登录上。但是在面板那里却没有正常的eva图表显示，来了信息也只有声音提示，没有闪烁的图标提示。请问是为什么？和我的grub问题有关联还是恰好出现而已。
请高手帮忙解决问题！谢谢！