双启动Ubuntu + Windows 8：Ubuntu不会显示
是的，这个网站上有很多与此问题有关的post，尤其是双启动菜单，Ubuntu和Windows 8没有显示和安装Ubuntu以及预先安装的带有UEFI的Windows 。 但我仍然无法解决问题。
我在Windows 8.1中禁用了快速启动和安全启动，并从Live磁盘安装了Xubuntu Trusty，但没有任何GRUB菜单。 特殊的部分是在BIOS中“引导设备优先级”只有两个选项：“Windows启动管理器”和“禁用”。 我认为这应该是“残疾人”的事情，但不幸的是我不知道究竟是什么！
我从实时磁盘运行Boot Repair两次没有任何好处。 这台机器是三星ATIV 9.我知道这个问题更多的是关于特定机器的BIOS和Win 8，但我需要能够使用Ubuntu的答案。
这是Boot Repair输出的下半部分：
/boot/efi detected in the fstab of sda8: UUID=1C3F-D310 (sda2) *******lspci -nnk | grep -iA3 vga 00:02.0 VGA compatible controller [0300]: Intel Corporation Haswell-ULT Integrated Graphics Controller [8086:0a16] (rev 09) Subsystem: Samsung Electronics Co Ltd Device [144d:c109] Kernel driver in use: i915 00:03.0 Audio device [0403]: Intel Corporation Haswell-ULT HD Audio Controller [8086:0a0c] (rev 09) ******* grub-install: info: executing modprobe efivars 2>/dev/null. grub-install: info: Looking for /sys/firmware/efi ... grub-install: info: ... not found. Looking for /proc/device-tree ... grub-install: info: ... not found. grub-install: error: /usr/lib/grub/i386-pc/modinfo.sh doesn't exist. Please specify --target or --directory. ,. GRUB too old for SecureBoot. Please report this message to boot.repair@gmail.com chroot /mnt/boot-sav/sda8 efibootmgr -v Fatal: Couldn't open either sysfs or procfs directories for accessing EFI variables. Try 'modprobe efivars' as root. chroot /mnt/boot-sav/sda8 uname -r Kernel: 3.13.0-24-generic Reinstall the grub-efi of sda8 grub-install: error: /usr/lib/grub/i386-pc/modinfo.sh doesn't exist. Please specify --target or --directory. grub-install : exit code of grub-install :1 Error: no grub*.efi generated. Please report this message to boot.repair@gmail.com Add /mnt/boot-sav/sda8/boot/efi efi entries in /mnt/boot-sav/sda8/etc/grub.d/25_custom Adding custom /mnt/boot-sav/sda8/boot/efi/EFI/Microsoft/Boot/bootmgfw.efi Adding custom /mnt/boot-sav/sda8/boot/efi/EFI/Boot/bootx64.efi sda2/bootx64.efi already added sda2/bootmgfw.efi already added Add /mnt/boot-sav/sda6 efi entries in /mnt/boot-sav/sda8/etc/grub.d/25_custom Adding custom /mnt/boot-sav/sda6/EFI/Asclepius/bootx64.efi ---- Grub-install verbose /usr/sbin/grub-install: 1: /usr/sbin/grub-install: cannot create nŵ?ŵ????T?T?@T?@DD?Påtd?ŒÒ?ŒÒLŒÒLl9l9?Qåtd??Råtd?ŵ=?ŵ=nŵ=n?????/lib64/ld-linux-x86-64.so.2???GNU??????GNUm: Directory nonexistent + ELF???? @????@@@@@ø?ø????8?8?@8?@?????@@d:?d:? ??ŵ=?ŵ=nŵ=nž{ ? ??? /usr/sbin/grub-install: 1: /usr/sbin/grub-install: ELF????: not found /usr/sbin/grub-install: 2: /usr/sbin/grub-install: Syntax error: ")" unexpected -------- /usr/sbin/grub-install : exit code of grub-install :2 ---- End of grub-install verbose chroot /mnt/boot-sav/sda8 efibootmgr -v Fatal: Couldn't open either sysfs or procfs directories for accessing EFI variables. Try 'modprobe efivars' as root. chroot /mnt/boot-sav/sda8 update-grub Generating grub configuration file ... Found linux image: /boot/vmlinuz-3.13.0-32-generic Found initrd image: /boot/initrd.img-3.13.0-32-generic Found linux image: /boot/vmlinuz-3.13.0-24-generic Found initrd image: /boot/initrd.img-3.13.0-24-generic Found Windows 8 (loader) on /dev/sda2 Unhide GRUB boot menu in sda8/boot/grub/grub.cfg An error occurred during the repair. You can now reboot your computer. You may want to retry after deactivating the [Backup and rename Windows EFI files] option. The boot of your PC is in Legacy mode. You may want to retry after changing it to EFI mode. 我按照这个指南 。 关键是我必须在禁用安全启动后选择启动选项UEFI，然后安装Ubuntu。 以前我把它设置为CMS。