linux - Grub引导win10无法启动

Question

win10出来了当然准备试一试，但装完之后怎么都进不了ubuntu，网上的各种方法试了一遍。。好像都不能引导到ubuntu。
于是决定用grub去引导win10 重装了一遍系统，这次先装的ubuntu再装的win10。
现在的情况是，开机进grub，然后进ubuntu无压力。在/boot/grub/grub.cfg中添加了win10启动项。
试了两种。

chainloader ＋1 启动会报EFI什么...的错误

后来chainloader改成图片中的样子 会报下图的错误

我开机需要狂按F12 然后从bios里的windows boot manager里进，不过确实可以进

我现在整个人不太好。。。
PS：欢迎小伙伴勾搭～ 学校里主要是做数据挖掘相关的项目，课余玩玩web开发～

Answer 1

### BEGIN /etc/grub.d/30_os-prober ###
menuentry 'Windows 8 (loader) (on /dev/sda1)' --class windows --class os $menuentry_id_option 'osprober-chain-F40A1F270A1EE680' {
    insmod part_msdos
    insmod ntfs
    set root='hd0,msdos1'
    if [ x$feature_platform_search_hint = xy ]; then
      search --no-floppy --fs-uuid --set=root --hint-bios=hd0,msdos1 --hint-efi=hd0,msdos1 --hint-baremetal=ahci0,msdos1  F40A1F270A1EE680
    else
      search --no-floppy --fs-uuid --set=root F40A1F270A1EE680
    fi
    parttool ${root} hidden-
    drivemap -s (hd0) ${root}
    chainloader +1
}
set timeout_style=menu
if [ "${timeout}" = 0 ]; then
  set timeout=10
fi
### END /etc/grub.d/30_os-prober ###

This is part of the bootgrub.cfg in my win10 file. I upgraded from win8 to win10. This section was automatically generated during installation...

I have 2 boot partitions, sda1 boots win8 (later win10), sda5 is divided into 2G /boot partition to boot Ubuntu
In addition, my installation process is as follows:
Win10 is installed first , then allocate 60G of free space
and then choose another USB disk to install Ubuntu. Ubuntu will create a /boot partition, and then select sda5 of /boot instead of the default sda1 when booting
and then restart directly into win10. Use easybcd to edit the boot menu, add a grub2 Ubuntu boot, select sda5
Save and then turn off the win10 quick start
Then you can choose win10 or ubuntu when you boot...