我使用 Grub2 通过 Manjaro 进行 UEFI 双启动 Win 10。这是我的引导加载程序：
[flex@mylaptop ~]$ efibootmgr --verbose
BootCurrent: 0001
Timeout: 0 seconds
BootOrder: 0001,0004,0000
Boot0000* Windows Boot Manager HD(1,GPT,91383c96-901f-403a-8de5-363c8eb6f581,0x800,0x32000)/File(\EFI\Microsoft\Boot\bootmgfw.efi)RC
Boot0001* Grub Menu HD(1,GPT,91383c96-901f-403a-8de5-363c8eb6f581,0x800,0x32000)/File(\EFI\manjaro\grubx64.efi)
Boot0002* UEFI Onboard LAN IPv4 PciRoot(0x0)/Pci(0x1c,0x0)/Pci(0x0,0x0)/MAC(qwerty123,0)/IPv4(0.0.0.00.0.0.0,0,0)RC
Boot0003* UEFI Onboard LAN IPv6 PciRoot(0x0)/Pci(0x1c,0x0)/Pci(0x0,0x0)/MAC(qwerty123,0)/IPv6([::]:<->[::]:,0,0)RC
Boot0004* Windows Boot Manager HD(1,GPT,91383c96-901f-403a-8de5-363c8eb6f581,0x800,0x32000)/File(\EFI\manjaro\grubx64.efi)WINDOWS.........x...B.C.D.O.B.J.E.C.T.=.{.9.d.e.a.8.6.2.c.-.5.c.d.d.-.4.e.7.0.-.a.c.c.1.-.f.3.2.b.3.4.4.d.4.7.9.5.}...6................
顺便问一下，条目末尾的所有这些额外字符是怎么回事Boot0004* Windows Boot Manager？这两个Windows Boot Manager条目是自动生成的，不是我创建的。我只使用Grub Menu了efibootmgr.
当我让笔记本电脑自行启动时，我会得到 Grub 菜单，我猜是因为这个引导加载程序已加载，因为它指向 Grub：
Boot0001* Grub Menu HD(1,GPT,91383c96-901f-403a-8de5-363c8eb6f581,0x800,0x32000)/File(\EFI\manjaro\grubx64.efi)
但是，如果我按 F12 进入 BIOS，然后从那里选择相同的“Boot0001* Grub Menu”引导加载程序，则 Grub 菜单将不会显示。当超时到期时，我从 Grub 菜单中选择的最后一个操作系统将加载。
当我从 UEFI BIOS 引导加载程序选择菜单屏幕手动选择 \EFI\manjaro\grubx64.efi 引导加载程序时，就像图形在 Grub 中无法工作一样。我可以在屏幕顶部看到一条带有乱码文本的思考线...但没有 Grub 菜单。这可能是我的 BIOS 固件的限制吗？我尝试重新创建将“Boot0001* Grub Menu”引导加载程序条目设置为“Boot0001* Windows Boot Manager”，但我得到了相同的结果。
我还在 Grub 配置文件中尝试了各种操作，例如使用 fx 图形（当前设置为自动），但这也没有任何区别。
这是我的 /etc/default/grub
GRUB_DEFAULT=saved
GRUB_TIMEOUT=5
#GRUB_TIMEOUT_STYLE=hidden
GRUB_TIMEOUT_STYLE=menu
GRUB_DISTRIBUTOR="Manjaro"
GRUB_CMDLINE_LINUX_DEFAULT="quiet apparmor=1 security=apparmor udev.log_priority=3"
#GRUB_CMDLINE_LINUX_DEFAULT="apparmor=1 security=apparmor udev.log_priority=3"
GRUB_CMDLINE_LINUX=""
# If you want to enable the save default function, uncomment the following
# line, and set GRUB_DEFAULT to saved.
GRUB_SAVEDEFAULT=true
# Preload both GPT and MBR modules so that they are not missed
GRUB_PRELOAD_MODULES="part_gpt part_msdos"
# Uncomment to enable booting from LUKS encrypted devices
#GRUB_ENABLE_CRYPTODISK=y
# Uncomment to use basic console
#GRUB_TERMINAL_INPUT=console
# Uncomment to disable graphical terminal
#GRUB_TERMINAL_OUTPUT=console
# The resolution used on graphical terminal
# note that you can use only modes which your graphic card supports via VBE
# you can see them in real GRUB with the command 'videoinfo'
GRUB_GFXMODE=auto
#GRUB_GFXMODE=1024x768
# Uncomment to allow the kernel use the same resolution used by grub
GRUB_GFXPAYLOAD_LINUX=keep
# Uncomment if you want GRUB to pass to the Linux kernel the old parameter
# format "root=/dev/xxx" instead of "root=/dev/disk/by-uuid/xxx"
#GRUB_DISABLE_LINUX_UUID=true
# Uncomment to disable generation of recovery mode menu entries
GRUB_DISABLE_RECOVERY=true
# Uncomment this option to enable os-prober execution in the grub-mkconfig command
GRUB_DISABLE_OS_PROBER=false
# Uncomment and set to the desired menu colors. Used by normal and wallpaper
# modes only. Entries specified as foreground/background.
GRUB_COLOR_NORMAL="light-gray/black"
GRUB_COLOR_HIGHLIGHT="green/black"
# Uncomment one of them for the gfx desired, a image background or a gfxtheme
#GRUB_BACKGROUND="/usr/share/grub/background.png"
GRUB_THEME="/usr/share/grub/themes/manjaro/theme.txt"
# Uncomment to get a beep at GRUB start
#GRUB_INIT_TUNE="480 440 1"
# Uncomment to ensure that the root filesystem is mounted read-only so that
# systemd-fsck can run the check automatically. We use 'fsck' by default, which
# needs 'rw' as boot parameter, to avoid delay in boot-time. 'fsck' needs to be
# removed from 'mkinitcpio.conf' to make 'systemd-fsck' work.
# See also Arch-Wiki: https://wiki.archlinux.org/index.php/Fsck#Boot_time_checking
#GRUB_ROOT_FS_RO=true
我的问题
当我从 UEFI BIOS 引导加载程序菜单中选择Boot0001* Grub MenuOR 时，如何才能显示 Grub 菜单？Boot0001* Windows Boot Manager
先感谢您！