Restore the GRUB Bootloader on Manjaro Linux. Usefull when your fresh windows install eats your grub and can not boot into your linux installation, or for some how your grub is missing

Restore the GRUB Bootloader.md

Restore the GRUB Bootloader on Manjaro

1. Chroot into your linux instalation
   1. The easiest way is with mhwd-chroot
      1. Install it yaourt -S mhwd-chroot
      2. Run it sudo mhwd-chroot
      3. DONE, you have chrooted into your linux installation (open a root console of your installed linux OS, is like just open a console with root access)
2. Restore your GRUB
   1. Install a new GRUB bootloader with grub-install /dev/sda
   2. Recheck to ensure the that installation has completed without any errors grub-install --recheck /dev/sda
   3. Finally, configure the freshly installed GRUB bootloader typing update-grub

Ref Manjaro Wiki - Restore the GRUB Bootloader

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Update Jul 2022

I dont use Manjaro distribution any more, the above step may been deprecated.

A solution posted in the comments that is receiving lots of positive feedback made by @y6nH seems to be the right steps to fix it:

These are the steps that worked for me, without having to install any new packages:

• Boot into Manjaro installer
• Open terminal
• sudo manjaro-chroot -a (and select system to mount)
• grub-install /dev/sda (it's sda for me; make sure you choose the right drive!)
• grub-install --recheck /dev/sda
• update-grub
• exit
• reboot

@y6nH Thank you! this worked perfectly for me after I had to reinstall Windows in my dual-boot setup. One other note, if anyone else has had to do this, you also need to check the flags on your partitions if both Windows and Manjaro are on the same disk - make sure the boot flag is set on your Manjaro partition and remove it from your Windows partition. After I ran the above steps it was still booting directly into Windows until I did that.

For those of y'all that boot into Manjaro immediately:

1. Boot into Manjaro
2. sudo gedit /etc/default/grub

Change the following 2 lines:

GRUB_TIMEOUT_STYLE=hidden -> GRUB_TIMEOUT_STYLE=menu
GRUB_TIMEOUT=0 -> GRUB_TIMEOUT=15

for me all i had to do was update grub and it worked again like a charm.

All I did was update-grub from and it worked. Ubuntu has a bad habit of breaking Manjaro bootloader. Sibling rivalry I suppose!

@y6nH Your solution did NOT work for me. When attempting to boot i was previously thrown into a grub shell, also grub does not show up on the correct disk when choosing what to boot from. Selecting the disk also put me in a grub shell, and the behaviour persisted after following your instructions.

I'm sorry I can't help any more; like the OP, I gave up on Manjaro after spending too much time troubleshooting it.

These are the steps that worked for me, without having to install any new packages:

* Boot into Manjaro installer

* Open terminal

* `sudo manjaro-chroot -a` (and select system to mount)

* `grub-install /dev/sda` (it's sda for me; make sure you choose the right drive!)

* `grub-install --recheck /dev/sda`

* `update-grub`

* `exit`

* reboot

Still works as a solution. Thanks!