Update-grub Not Finding Manjaro Or Windows

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1

Today I ran updates, which had some sort of issue which caused my laptop to freeze. I restarted my laptop, and I got the usual Grub menu, except that it was missing the Manjaro entry (I have dual-boot Manjaro/Windows), so I saw Windows and Memtest.

Trying to fix the issue, I attempted to repair the Grub entries. I have two drives (an SSD and a HDD), and I think I misunderstood something, but I somehow managed to break the Grub menu. So at that point, when I booted, I simply saw a Grub terminal (not the Grub rescue).

With help from the Wiki and some forum posts I managed to fix Grub again, but now my issue is that it isn’t detecting Manjaro or Windows.

Here’s my drives (sda is for /home & windows, sdb is / , and sdc is my flash drive) :

NAME   MAJ:MIN RM   SIZE RO TYPE MOUNTPOINT
loop0    7:0    0  44.8M  1 loop 
loop1    7:1    0 225.3M  1 loop 
loop2    7:2    0   770M  1 loop 
loop3    7:3    0 372.7M  1 loop 
sda      8:0    0 931.5G  0 disk 
|-sda1   8:1    0 831.5G  0 part /home
|-sda2   8:2    0   450M  0 part 
|-sda3   8:3    0   100M  0 part 
|-sda4   8:4    0    16M  0 part 
|-sda5   8:5    0  98.9G  0 part 
`-sda6   8:6    0   523M  0 part 
sdb      8:16   0 119.2G  0 disk 
|-sdb1   8:17   0     1G  0 part /boot/efi
|-sdb2   8:18   0 110.2G  0 part /
`-sdb3   8:19   0     8G  0 part 
sdc      8:32   1  14.2G  0 disk 
|-sdc1   8:33   1  14.2G  0 part 
`-sdc4   8:36   1   1.4G  0 part

Here’s an update-grub:

[manjaro /]# update-grub
Generating grub configuration file ...
Found theme: /usr/share/grub/themes/manjaro/theme.txt
grub-probe: error: cannot find a GRUB drive for /dev/sdc1.  Check your device.map.
grub-probe: error: cannot find a GRUB drive for /dev/sdc1.  Check your device.map.
Adding boot menu entry for UEFI Firmware Settings ...
Found memtest86+ image: /boot/memtest86+/memtest.bin
done

I think my boot directory might also be relevant?

[manjaro boot]# ls
efi  grub  intel-ucode.img  linux419-x86_64.kver  linux54-x86_64.kver  memtest86+

So my question now is how do I get update-grub to find Manjaro / Windows ?

2

Welcome to the forum! :slight_smile:

Ah yes, the Impatient User™ issue. It’s a known problem. :grin:

Pretty much; you don’t have any kernels installed ─ they are always deleted at the start of the update process and the new kernels are only added much later in the process.

Boot up from the USB stick in live mode and open up a terminal window. In said window, type the command… :arrow_down:

su -

… and enter the live medium’s root password ─ “manjaro”. Next, issue the following command… :arrow_down:

manjaro-chroot -a

If you are presented with a menu/choice, press 1. Next, issue the following commands… :arrow_down:

pacman-mirrors -f 5 && pacman -Syyu
mhwd-kernel -i linux54 linux419
grub-install --recheck --no-rs-codes --modules="part_gpt part_msdos zstd"
update-grub
sync
exit

It should now be safe to reboot the system. Good luck! :crossed_fingers:

1 Like
3

:joy: yes, Impatient User™, I was in a bit of a hurry

pacman -Syyu returns “there is nothing to do”
but then:

[manjaro boot]# mhwd-kernel -i linux54 linux419
:: Synchronizing package databases...
 core                                                           169.3 KiB  6.36 MiB/s 00:00 [#####################################################] 100%
 extra                                                         2000.2 KiB  6.98 MiB/s 00:00 [#####################################################] 100%
 community                                                        6.3 MiB  6.83 MiB/s 00:01 [#####################################################] 100%
 multilib                                                       191.3 KiB  7.18 MiB/s 00:00 [#####################################################] 100%
error: no targets specified (use -h for help)
4

Try deleting these two files…: /boot/linux419-x86_64.kver and /boot/ linux54-x86_64.kver. Then try reinstalling the kernels… :arrow_down:

mhwd-kernel -i linux54 linux419
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same output:

[manjaro boot]# rm linux419-x86_64.kver 
[manjaro boot]# rm linux54-x86_64.kver 
[manjaro boot]# ls
efi  grub  intel-ucode.img  memtest86+
[manjaro boot]# mhwd-kernel -i linux54 linux419
:: Synchronizing package databases...
 core                                                           169.3 KiB  4.47 MiB/s 00:00 [#####################################################] 100%
 extra                                                         2000.2 KiB  6.22 MiB/s 00:00 [#####################################################] 100%
 community                                                        6.3 MiB  6.91 MiB/s 00:01 [#####################################################] 100%
 multilib                                                       191.3 KiB  7.78 MiB/s 00:00 [#####################################################] 100%
error: no targets specified (use -h for help)
6

Okay, then try this first…: :arrow_down:

pacman -S linux419 linux54

:crossed_fingers:

1 Like
7

This looks promising:

(4/4) Updating Grub-Bootmenu
Generating grub configuration file ...
Found theme: /usr/share/grub/themes/manjaro/theme.txt
Found linux image: /boot/vmlinuz-5.4-x86_64
Found initrd image: /boot/intel-ucode.img /boot/initramfs-5.4-x86_64.img
Found initrd fallback image: /boot/initramfs-5.4-x86_64-fallback.img
Found linux image: /boot/vmlinuz-4.19-x86_64
Found initrd image: /boot/intel-ucode.img /boot/initramfs-4.19-x86_64.img
Found initrd fallback image: /boot/initramfs-4.19-x86_64-fallback.img
grub-probe: error: cannot find a GRUB drive for /dev/sdc1.  Check your device.map.
grub-probe: error: cannot find a GRUB drive for /dev/sdc1.  Check your device.map.
Adding boot menu entry for UEFI Firmware Settings ...
Found memtest86+ image: /boot/memtest86+/memtest.bin
done

I’ll reboot and update

1 Like
8

:partying_face: it worked, thank you very much!

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