安装完Ubuntu 9.04启动到grub时出现waiting for loading…后提示找不到root device,然后跳入initramfs,这时如果运行exit可以进入系统说明rootdelay时间太短了,解决办法:sudo vi /boot/grub/menu.lis可以看到要启动的grub项目:## ## End Default Options ##title Ubuntu 9.04, kernel 2.6.28-11-server
uuid c757c22c-b798-433a-b284-8bca8e084406
kernel /vmlinuz-2.6.28-11-server root=/dev/mapper/shangri–la-root ro quiet splash
initrd /initrd.img-2.6.28-11-server
quiettitle Ubuntu 9.04, kernel 2.6.28-11-server (recovery mode)
uuid c757c22c-b798-433a-b284-8bca8e084406
kernel /vmlinuz-2.6.28-11-server root=/dev/mapper/shangri–la-root ro single
initrd /initrd.img-2.6.28-11-servertitle Ubuntu 9.04, memtest86+
uuid c757c22c-b798-433a-b284-8bca8e084406
kernel /memtest86+.bin
quiet这里在第一项里面的kernel行中加入rootdela=90如下:## ## End Default Options ##title Ubuntu 9.04, kernel 2.6.28-11-server
uuid c757c22c-b798-433a-b284-8bca8e084406
kernel /vmlinuz-2.6.28-11-server root=/dev/mapper/shangri–la-root ro quiet splash rootdelay=90
initrd /initrd.img-2.6.28-11-server
quiettitle Ubuntu 9.04, kernel 2.6.28-11-server (recovery mode)
uuid c757c22c-b798-433a-b284-8bca8e084406
kernel /vmlinuz-2.6.28-11-server root=/dev/mapper/shangri–la-root ro single
initrd /initrd.img-2.6.28-11-servertitle Ubuntu 9.04, memtest86+
uuid c757c22c-b798-433a-b284-8bca8e084406
kernel /memtest86+.bin
quiet重启后正常。Ubuntu 10.04 中关于 synaptics 的配置图文详解修改Linux中的root密码相关资讯 Ubuntu知识
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