Can not reinstall kernel due to ghost kernel

Support Kernel
1

Hello,

I updated my computer last week, but i suspect that since my wifi connection was unstable, this is probably why this problem occurs.

I have a dual boot. My grub did not show an entry for Manjaro so I tried grub-install grub-mkconfig again but now this showed a grub command line.

I entered boot, and it told me that there wasn’t a kernel.

I tried booting using a manjaro livecd usb. I did manjaro-chroot -a, and pacman -Syyu. Then reinstalled the grub like before. Still no luck, it told me there wasn’t a kernel.

I booted back into the livecd usb, entered in mhwd-kernel -li
This is the output:
Currently running: 5.6.15-1-MANJARO (linux56) The following kernels are installed in your system:

It shows that I am running linux56, but why isn’t it listed?

I tried: sudo mhwd-kernel --install linux54
output:
error: no targets specified (use -h for help)

I saw this: mhwd-kernel -i only works when you boot with a Manjaro kernel · Issue #49 · manjaro/mhwd · GitHub which makes me think that I don’t have a kernel installed.

I also saw other people who tried re-installing their kernel, but they always had other kernels installed from the mhwd-kernel -li command but I don’t.

pacman -Syyu has nothing else to update. I already tried that several times.

I also searched for my kernel using pacman -Q | grep linux
output:
archlinux-appstream-data 20210125-1
archlinux-keyring 20210110-1
lib32-util-linux 2.36.1-1
linux-api-headers 5.10.13-1
linux-firmware 20210208.r1828.b79d239-1
util-linux 2.36.1-4
util-linux-libs 2.36.1-4

From above, there is no linux package.

Help please.

2

mhwd-kernel doesn’t work to install a kernel in chroot.
I don’t know why or whether this is documented in wikis.
I know this from experience.

Use pacman instead of mhwd-kernel to install a kernel while inside the chroot environment.
watch the output - whether the initrd is created in the process or not
depending on that do or do not do:
mkinitcpio -P
and
update-grub

3

Install what using pacman?

4

… the kernel? :wink:

… I just edited/amended my previous post …

5

yes sorry I still thought mwhd-kernel was still going to be used. What is the point of mhwd-kernel -i if pacman is just as sufficient?

I successfully installed linux510 using pacman, and grub properly displays. I can now boot into manjaro. Thank you so much!

But, now my windows 10 partition is not showing. Why is this?

6

it saves you the possibly needed additional steps of creating the initial ram fs
mkinitcpio -P
and
update-grub
to make the procedure … I was going to say idiot proof but that’s not meant in a demeaning way - it just makes the procedure less complex for novice users who know nothing about the command line or the inner workings of the system.

… if in chroot - and mhwd-kernel doesn’t work
use the original procedure …

7

I have no experience with this - as I don’t have a dual boot system,
it should be easy,
once you are able to boot again,
from inside your linux system.
Consult the wiki.
Probably just run update-grub again - to re-check and probe for the Windows partition which may not have been visible from chroot.

8

Okay, yeah ill do that. Thanks again for replying so quickly to my post.

Edit: yup update-grub truly did update my grub and found my windows boot

9

awesome
(I expected that, but still: nice that it now all seems to work again)

10

I was just wondering. Why is it that even after I do pacman -Syu, it still did not install the linux kernel? And I had to manually install it.

11

not sure what you mean
pacman -Syu
just does update the already installed packages
If a kernel isn’t installed - it won’t (can’t) get updated.
It seems you somehow managed to not have a kernel installed … :wink:

now you do

… better install at least two - to have a fallback in case one doesn’t work as expected …

12

can you report

inxi -MCx
sudo ls /etc/mkinitcpio.d/*.preset
sudo mhwd-kernel -li
13

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