[Dual Boot] Can't get into grub but straightly boot Manjaro after updating Manjaro

[BrandonMoo]

My computer is a dual-boot system, where the Manjaro on the /dev/nvme0n1 and Windows 10 on the /dev/sda.(sdc and sdd are usb ports, sdb is hard drive) After updating Manjaro by sudo pacman -Syu today, I can’t get into grub. It just straightly boot Manjaro.
Here is some command line I run in Manjaro:

#fdisk -l：
    .......
    设备                起点      末尾      扇区  大小 类型
    /dev/nvme0n1p1      2048    206847    204800  100M EFI 系统
    /dev/nvme0n1p2    206848    239615     32768   16M Microsoft 保留
    /dev/nvme0n1p3    239616   1400831   1161216  567M Windows 恢复环境
    /dev/nvme0n1p4   1400832   2424831   1024000  500M Linux 文件系统
    /dev/nvme0n1p5   2424832  19202047  16777216    8G Linux swap
    /dev/nvme0n1p6  19202048 228917247 209715200  100G Linux 文件系统
    /dev/nvme0n1p7 521117696 730830847 209713152  100G Linux 文件系统
    ......
    设备            起点      末尾      扇区   大小 类型
    /dev/sda1       2048   1230846   1228799   600M EFI 系统
    /dev/sda2    1230848 313171873 311941026 148.7G Microsoft 基本数据
    /dev/sda3  313171968 937699327 624527360 297.8G Microsoft 基本数据
    .......
#spercificly there are 2 EFI Windows partition, previos one on the nvme, the new on the sda. 
#That's because I migrate Windows from nvme to sda and leave the old EFI there.

#lsblk:
NAME        MAJ:MIN RM   SIZE RO TYPE MOUNTPOINT
loop0         7:0    0  55.4M  1 loop /var/lib/snapd/snap/core18/1944
loop1         7:1    0  32.3M  1 loop /var/lib/snapd/snap/snapd/11107
loop2         7:2    0  55.5M  1 loop /var/lib/snapd/snap/core18/1988
loop3         7:3    0     2M  1 loop /var/lib/snapd/snap/libimobiledevice/2
loop4         7:4    0  31.1M  1 loop /var/lib/snapd/snap/snapd/11036
sda           8:0    0 447.1G  0 disk 
├─sda1        8:1    0   600M  0 part /boot/efi
├─sda2        8:2    0 148.7G  0 part /run/media/bran/系统
└─sda3        8:3    0 297.8G  0 part /run/media/bran/新加卷
sdb           8:16   0 931.5G  0 disk 
├─sdb1        8:17   0   128M  0 part 
└─sdb2        8:18   0 931.4G  0 part 
sdc           8:32   1   7.2G  0 disk /run/media/bran/70E1-6606
sdd           8:48   1  28.8G  0 disk 
├─sdd1        8:49   1     3G  0 part 
└─sdd2        8:50   1     4M  0 part 
nvme0n1     259:0    0 465.8G  0 disk 
├─nvme0n1p1 259:1    0   100M  0 part 
├─nvme0n1p2 259:2    0    16M  0 part 
├─nvme0n1p3 259:3    0   567M  0 part 
├─nvme0n1p4 259:4    0   500M  0 part /boot
├─nvme0n1p5 259:5    0     8G  0 part [SWAP]
├─nvme0n1p6 259:6    0   100G  0 part /
└─nvme0n1p7 259:7    0   100G  0 part /home

#sudo update-grub:
正在生成 grub 配置文件 ...
找到主题：/usr/share/grub/themes/manjaro/theme.txt
找到 Linux 镜像：/boot/vmlinuz-5.10-x86_64
找到 initrd 镜像：/boot/intel-ucode.img /boot/initramfs-5.10-x86_64.img
Found initrd fallback image: /boot/initramfs-5.10-x86_64-fallback.img
找到 Linux 镜像：/boot/vmlinuz-5.9-x86_64
找到 initrd 镜像：/boot/intel-ucode.img /boot/initramfs-5.9-x86_64.img
Found initrd fallback image: /boot/initramfs-5.9-x86_64-fallback.img
找到 Linux 镜像：/boot/vmlinuz-5.8-x86_64
找到 initrd 镜像：/boot/intel-ucode.img /boot/initramfs-5.8-x86_64.img
Found initrd fallback image: /boot/initramfs-5.8-x86_64-fallback.img
找到 Linux 镜像：/boot/vmlinuz-5.7-x86_64
找到 initrd 镜像：/boot/intel-ucode.img /boot/initramfs-5.7-x86_64.img
Found initrd fallback image: /boot/initramfs-5.7-x86_64-fallback.img
找到 Linux 镜像：/boot/vmlinuz-5.4-x86_64
找到 initrd 镜像：/boot/intel-ucode.img /boot/initramfs-5.4-x86_64.img
Found initrd fallback image: /boot/initramfs-5.4-x86_64-fallback.img
警告： os-prober will not be executed to detect other bootable partitions.
Systems on them will not be added to the GRUB boot configuration.
Check GRUB_DISABLE_OS_PROBER documentation entry.
Adding boot menu entry for UEFI Firmware Settings ...
Found memtest86+ image: /boot/memtest86+/memtest.bin
/usr/bin/grub-probe：警告： 未知的设备类型 nvme0n1.
完成

And system information:

 ██████████████████  ████████     bran@bran-t500
 ██████████████████  ████████     OS: Manjaro 20.2.1 Nibia
 ██████████████████  ████████     Kernel: x86_64 Linux 5.10.19-1-MANJARO
 ██████████████████  ████████     Uptime: 40m
 ████████            ████████     Packages: 1607
 ████████  ████████  ████████     Shell: bash
 ████████  ████████  ████████     Resolution: 2560x2520
 ████████  ████████  ████████     DE: KDE 5.79.0 / Plasma 5.21.2
 ████████  ████████  ████████     WM: KWin
 ████████  ████████  ████████     GTK Theme: Mcata-dark-solid-alt [GTK2/3]
 ████████  ████████  ████████     Icon Theme: McMojave-circle
 ████████  ████████  ████████     Disk: 221G / 660G (34%)
 ████████  ████████  ████████     CPU: Intel Core i7-7700HQ @ 8x 3.8GHz [61.0°C]
 ████████  ████████  ████████     GPU: GeForce GTX 1060
                                  RAM: 2259267584-

What should I do? Thanks for helping.

[Aragorn]

Edit the file /etc/default/grub and change the following line…

GRUB_TIMEOUT_STYLE=hidden

… into…

GRUB_TIMEOUT_STYLE=menu

Also make sure you add the following line to the file before saving…

GRUB_DISABLE_OS_PROBER=false

Save the file and then run the following command in a terminal window…

sudo update-grub

[ludoux]

Hi. I may face the same problem. It seems that grub has a safety problem and disable os-detection by default.

• Grub got some needed [security updates ]. Note that os-prober is now disabled by default for security reasons: [broken patch ]; [fixed patch ](. More infos about it [here ]. To restore the old behavior, open a terminal and issue sudo echo GRUB_DISABLE_OS_PROBER=false >> /etc/default/grub && sudo update-grub

I fix it by append GRUB_DISABLE_OS_PROBER=false to /etc/default/grub file as what the quote mention. Hope it can help you.

[BrandonMoo]

Thanks, that works for me. I should have followed the community instruction…

[BrandonMoo]

Thanks bro!