Manjaro not booting after trying to fix error /boot/vmlinuz

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1

about a week ago i ran the command sudo pacman -Syu to update my system, however i ctrl-C since it took too long (or i turned the computer off, can’t remember which one), later i tried turning on my laptop and it gave the error file /boot/vmlinuz not found, i googled the error and found a way to fix it, i followed the steps:
1.get an usb with manjaro on it.
2.open terminal after booting using the usb and run the following commands

sudo su -
manjaro-chroot -a
pacman-mirrors -f 5 && pacman -Syyu
update-grub
exit

after that i turned the laptop off, removed the usb, turned the laptop on and this time it didnt load manjaro at all, it simply loaded memtest, which was odd, i googled some more and found that u can press ESC key to show the grub boot menu, i did that and all the menu showed was memtest, no manjaro(manjaro was an option before running the commands i ran)

do note that when i ran the command manjaro-chroot -a the following errors were shown in terminal

grub-probe: error: cannot find a GRUB drive for /dev/sdb1.  Check your device.map.
grub-probe: error: cannot find a GRUB drive for /dev/sdb1.  Check your device.map.

How can i fix this? is there any additional information i need to provide ? if so please tell me can i get access to such info. Thank you.

2 
sudo su -
manjaro-chroot -a
pacman-mirrors -f 5 && pacman -Syyu
mkinitcpio -P # <-- this creates vmlinuz
update-grub
exit
3

the following errors appeared after i ran the command

mkinitcpio -P

==> Building image from preset: /etc/mkinitcpio.d/linux515.preset: 'default'
  -> -k /boot/vmlinuz-5.15-x86_64 -c /etc/mkinitcpio.conf -g /boot/initramfs-5.15-x86_64.img
==> ERROR: specified kernel image does not exist: `/boot/vmlinuz-5.15-x86_64'
==> Building image from preset: /etc/mkinitcpio.d/linux515.preset: 'fallback'
  -> -k /boot/vmlinuz-5.15-x86_64 -c /etc/mkinitcpio.conf -g /boot/initramfs-5.15-x86_64-fallback.img -S autodetect
==> ERROR: specified kernel image does not exist: `/boot/vmlinuz-5.15-x86_64'
4

i forgot to mention but i did run the following command before too

rm -f /var/lib/pacman/db.lck

specifically i ran it after running

sudo su -
manjaro-chroot -a
5

You need to install kernels you had before again. That’s all.

6

see this

7

No need for mkinitcpio and update-grub even, pacman will do it via pacman hooks anyway.

8

Thanks that worked.

9

As well as you don’t need sudo to chroot in the live USB, and you definitely don’t use sudo in the chroot terminal as you’re already root.

10

I haven’t mentioned anything about sudo and chroot though. :slight_smile: (I usually leave sudo out anyway - people can figure it out by themselves.)

11

I didn’t write that. You replied to a post, correcting it, and I replied to yours and wrote “as well as blabla…” adding to the correction. This works but is not correct:

sudo manjaro-chroot -a
sudo update-grub

I see that often copy/pasted, and despite telling it every time, people continue the same copy/paste of the same erroneous commands.

12

Roger. Although I’m not sure about manjaro-chroot off the top of my head.

EDIT: Ok, spun VM. You are correct. I guess things just work better with sudo and -Syyyyu.

13

I’m sure, you don’t need sudo in the live USB to chroot (unless it changed recently).

14

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