Hi
My system already had Windows 10 installed on an SSD before I installed Manjaro on a 2nd SSD.
In grub I don’t see an option to boot into Windows and I have to use that by pressing F12 when the system is booting up and select Windows from the BIOS/UEFI boot options.
How can I add Windows to the grub menu?
Thanks!
Can you post /boot/grub/grub.cfg here ?
Hello wonderful person! 
[Nexus ~]# lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
nvme1n1 259:0 0 953.9G 0 disk
├─nvme1n1p1 259:5 0 300M 0 part /boot/efi
└─nvme1n1p2 259:6 0 953.6G 0 part /
nvme0n1 259:1 0 476.9G 0 disk
├─nvme0n1p1 259:2 0 50M 0 part
├─nvme0n1p2 259:3 0 476.4G 0 part
└─nvme0n1p3 259:4 0 505M 0 part
[Nexus ~]# cat /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$feature_default_font_path = xy ] ; then
font=unicode
else
insmod part_gpt
insmod ext2
if [ x$feature_platform_search_hint = xy ]; then
search --no-floppy --fs-uuid --set=root 29b52930-03c1-4460-b6b9-44dfe812fee5
else
search --no-floppy --fs-uuid --set=root 29b52930-03c1-4460-b6b9-44dfe812fee5
fi
font="/usr/share/grub/unicode.pf2"
fi
if loadfont $font ; then
set gfxmode=auto
load_video
insmod gfxterm
set locale_dir=$prefix/locale
set lang=en_AU
insmod gettext
fi
terminal_input console
terminal_output gfxterm
if [ x$feature_timeout_style = xy ] ; then
set timeout_style=menuwq
set timeout=10
# Fallback hidden-timeout code in case the timeout_style feature is
# unavailable.
elif sleep --interruptible 10 ; then
set timeout=0
fi
### END /etc/grub.d/00_header ###
### BEGIN /etc/grub.d/10_linux ###
menuentry 'Manjaro Linux' --class manjaro --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-simple-29b52930-03c1-4460-b6b9-44dfe812fee5' {
savedefault
load_video
set gfxpayload=keep
insmod gzio
insmod part_gpt
insmod ext2
if [ x$feature_platform_search_hint = xy ]; then
search --no-floppy --fs-uuid --set=root 29b52930-03c1-4460-b6b9-44dfe812fee5
else
search --no-floppy --fs-uuid --set=root 29b52930-03c1-4460-b6b9-44dfe812fee5
fi
linux /boot/vmlinuz-5.8-x86_64 root=UUID=29b52930-03c1-4460-b6b9-44dfe812fee5 rw quiet apparmor=1 security=apparmor udev.log_priority=3 acpi=off
initrd /boot/amd-ucode.img /boot/initramfs-5.8-x86_64.img
}
submenu 'Advanced options for Manjaro Linux' $menuentry_id_option 'gnulinux-advanced-29b52930-03c1-4460-b6b9-44dfe812fee5' {
menuentry 'Manjaro Linux (Kernel: 5.8.6-1-MANJARO x64)' --class manjaro --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-5.8.6-1-MANJARO x64-advanced-29b52930-03c1-4460-b6b9-44dfe812fee5' {
savedefault
load_video
set gfxpayload=keep
insmod gzio
insmod part_gpt
insmod ext2
if [ x$feature_platform_search_hint = xy ]; then
search --no-floppy --fs-uuid --set=root 29b52930-03c1-4460-b6b9-44dfe812fee5
else
search --no-floppy --fs-uuid --set=root 29b52930-03c1-4460-b6b9-44dfe812fee5
fi
linux /boot/vmlinuz-5.8-x86_64 root=UUID=29b52930-03c1-4460-b6b9-44dfe812fee5 rw quiet apparmor=1 security=apparmor udev.log_priority=3 acpi=off
initrd /boot/amd-ucode.img /boot/initramfs-5.8-x86_64.img
}
menuentry 'Manjaro Linux (Kernel: 5.8.6-1-MANJARO x64 - fallback initramfs)' --class manjaro --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-5.8.6-1-MANJARO x64-fallback-29b52930-03c1-4460-b6b9-44dfe812fee5' {
load_video
set gfxpayload=keep
insmod gzio
insmod part_gpt
insmod ext2
if [ x$feature_platform_search_hint = xy ]; then
search --no-floppy --fs-uuid --set=root 29b52930-03c1-4460-b6b9-44dfe812fee5
else
search --no-floppy --fs-uuid --set=root 29b52930-03c1-4460-b6b9-44dfe812fee5
fi
linux /boot/vmlinuz-5.8-x86_64 root=UUID=29b52930-03c1-4460-b6b9-44dfe812fee5 rw quiet apparmor=1 security=apparmor udev.log_priority=3 acpi=off
initrd /boot/initramfs-5.8-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/30_uefi-firmware ###
menuentry 'UEFI Firmware Settings' $menuentry_id_option 'uefi-firmware' {
fwsetup
}
### END /etc/grub.d/30_uefi-firmware ###
### 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 $prefix/custom.cfg;
fi
### END /etc/grub.d/41_custom ###
### BEGIN /etc/grub.d/60_memtest86+ ###
if [ "${grub_platform}" == "pc" ]; then
menuentry "Memory Tester (memtest86+)" --class memtest86 --class gnu --class tool {
search --fs-uuid --no-floppy --set=root 29b52930-03c1-4460-b6b9-44dfe812fee5
linux16 /boot/memtest86+/memtest.bin
}
fi
### END /etc/grub.d/60_memtest86+ ###
Windows is on nvme0n1 and Manjaro on nvme1n1.
PS: I borrowed that phrase from the What Da Math channel on YouTube.
Then try to start Manjaro and execute
update-grub
as sudo or root.
I Think you have Windows installed on BIOS/MBR mode but your Manjaro is in UEFI mode. If that’s the case, you can’t add Windows to the grub menu. Grub doesn’t support that. If I recall it correctly, refind supports that type of mixed boot (but I’m not sure)
You can check if your windows is on UEFI or BIOS/MBR mode with this: https://www.addictivetips.com/windows-tips/check-uefi-or-bios-legacy-firmware-on-windows-10/ (First result in google )
You were right, however I am not sure how that has happened as I had disabled legacy mode in the BIOS. I will reinstall Windows and report back.
Hi all,
I had accidentally enabled (or maybe it was enabled by default) the CSM (Compatibility Support Module) and looks like that was what causing all the problems. I disabled it and reinstalled Windows and Manjaro and now everything is A-Okay.
