在ubuntu9.10中重新启用Ctrl-Alt-Backspace来重启X系统
System->Preference->Keyboard->Layout->Layout Option->select [Key sequeence to kill the X server]

更改启动顺序，
1. mv /etc/grub.d/30_os-prober to /etc/grub.d/04_os-prober
2. change /etc/grub/grub.cfg, 见附件