Ставил grub так:
grub-install --target=x86_64-efi --efi-directory=/boot/efi --bootloader-id=manjaro_grub --boot-directory=/boot/efi/EFI --recheck --debug
grub-mkconfig -o /boot/grub/grub.cfg
#
# DO NOT EDIT THIS FILE
#
# It is automatically generated by grub-mkconfig using templates
# from /etc/grub.d and settings from /etc/default/grub
#
### BEGIN /etc/grub.d/00_header ###
insmod part_gpt
insmod part_msdos
if [ -s $prefix/grubenv ]; then
load_env
fi
if [ "${next_entry}" ] ; then
set default="${next_entry}"
set next_entry=
save_env next_entry
set boot_once=true
else
set default="${saved_entry}"
fi
if [ x"${feature_menuentry_id}" = xy ]; then
menuentry_id_option="--id"
else
menuentry_id_option=""
fi
export menuentry_id_option
if [ "${prev_saved_entry}" ]; then
set saved_entry="${prev_saved_entry}"
save_env saved_entry
set prev_saved_entry=
save_env prev_saved_entry
set boot_once=true
fi
function savedefault {
if [ -z "${boot_once}" ]; then
saved_entry="${chosen}"
save_env saved_entry
fi
}
function load_video {
if [ x$feature_all_video_module = xy ]; then
insmod all_video
else
insmod efi_gop
insmod efi_uga
insmod ieee1275_fb
insmod vbe
insmod vga
insmod video_bochs
insmod video_cirrus
fi
}
set menu_color_normal=light-gray/black
set menu_color_highlight=green/black
if [ x$feature_default_font_path = xy ] ; then
font=unicode
else
insmod part_gpt
insmod btrfs
if [ x$feature_platform_search_hint = xy ]; then
search --no-floppy --fs-uuid --set=root c6435f16-4fb4-45d6-ab9f-6e9cb627defe
else
search --no-floppy --fs-uuid --set=root c6435f16-4fb4-45d6-ab9f-6e9cb627defe
fi
font="/arch/root/usr/share/grub/unicode.pf2"
fi
if loadfont $font ; then
set gfxmode=auto
load_video
insmod gfxterm
fi
terminal_input console
terminal_output gfxterm
if [ x$feature_timeout_style = xy ] ; then
set timeout_style=menu
set timeout=3
# Fallback normal timeout code in case the timeout_style feature is
# unavailable.
else
set timeout=3
fi
### END /etc/grub.d/00_header ###
### BEGIN /etc/grub.d/01_menu_auto_hide ###
if [ "${boot_success}" = "1" -o "${boot_indeterminate}" = "1" ]; then
set last_boot_ok=1
else
set last_boot_ok=0
fi
# Reset boot_indeterminate after a successful boot
if [ "${boot_success}" = "1" ] ; then
set boot_indeterminate=0
# Avoid boot_indeterminate causing the menu to be hidden more then once
elif [ "${boot_indeterminate}" = "1" ]; then
set boot_indeterminate=2
fi
set boot_success=0
save_env boot_success boot_indeterminate
if [ x$feature_timeout_style = xy ] ; then
if [ "${menu_show_once}" ]; then
unset menu_show_once
save_env menu_show_once
set timeout_style=menu
set timeout=60
elif [ "${menu_auto_hide}" -a "${last_boot_ok}" = "1" ]; then
set orig_timeout_style=${timeout_style}
set orig_timeout=${timeout}
if [ "${fastboot}" = "1" ]; then
# timeout_style=menu + timeout=0 avoids the countdown code keypress check
set timeout_style=menu
set timeout=0
else
set timeout_style=hidden
set timeout=1
fi
fi
fi
### END /etc/grub.d/01_menu_auto_hide ###
### BEGIN /etc/grub.d/10_linux ###
menuentry 'Manjaro Linux' --class manjaro --class gnu-linux --class gnu --class>
savedefault
load_video
set gfxpayload=keep
insmod gzio
insmod part_gpt
insmod fat
if [ x$feature_platform_search_hint = xy ]; then
search --no-floppy --fs-uuid --set=root D291-C3AD
else
search --no-floppy --fs-uuid --set=root D291-C3AD
fi
linux /vmlinuz-5.2-x86_64 root=UUID=c6435f16-4fb4-45d6-ab9f-6e9cb627d>
initrd /amd-ucode.img /initramfs-5.2-x86_64.img
}
submenu 'Advanced options for Manjaro Linux' $menuentry_id_option 'gnulinux-adv>
menuentry 'Manjaro Linux (Kernel: 5.2.1-1-MANJARO x64)' --class manjaro>
savedefault
load_video
set gfxpayload=keep
insmod gzio
insmod part_gpt
insmod fat
if [ x$feature_platform_search_hint = xy ]; then
search --no-floppy --fs-uuid --set=root D291-C3AD
else
search --no-floppy --fs-uuid --set=root D291-C3AD
fi
linux /vmlinuz-5.2-x86_64 root=UUID=c6435f16-4fb4-45d6-ab9f-6>
initrd /amd-ucode.img /initramfs-5.2-x86_64.img
}
menuentry 'Manjaro Linux (Kernel: 5.2.1-1-MANJARO x64 - fallback initra>
load_video
set gfxpayload=keep
insmod gzio
insmod part_gpt
insmod fat
if [ x$feature_platform_search_hint = xy ]; then
search --no-floppy --fs-uuid --set=root D291-C3AD
else
search --no-floppy --fs-uuid --set=root D291-C3AD
fi
linux /vmlinuz-5.2-x86_64 root=UUID=c6435f16-4fb4-45d6-ab9f-6>
initrd /initramfs-5.2-x86_64-fallback.img
}
}
### END /etc/grub.d/10_linux ###
### BEGIN /etc/grub.d/20_linux_xen ###
### END /etc/grub.d/20_linux_xen ###
### BEGIN /etc/grub.d/30_os-prober ###
### END /etc/grub.d/30_os-prober ###
### BEGIN /etc/grub.d/40_custom ###
# This file provides an easy way to add custom menu entries. Simply type the
# menu entries you want to add after this comment. Be careful not to change
# the 'exec tail' line above.
### END /etc/grub.d/40_custom ###
### BEGIN /etc/grub.d/41_custom ###
if [ -f ${config_directory}/custom.cfg ]; then
source ${config_directory}/custom.cfg
elif [ -z "${config_directory}" -a -f $prefix/custom.cfg ]; then
source $prefix/custom.cfg;
fi
### END /etc/grub.d/41_custom ###
### BEGIN /etc/grub.d/41_snapshots-btrfs ###
### END /etc/grub.d/41_snapshots-btrfs ###
При загрузке пишет: «Reboot and Select proper Boot device or Insert Boot Media in selected Boot device and press a key»