Kernel Panic

[Srl3nny]

Hi
Congratulations for the tuto.
I get the message druring the boot.
kernel panic - not syncing vfs unable to mount root fs on unknown-block (0 0)

I tried change grub.cfg to root=/dev/sda{1,2,3,4} and did not work.

My disk identifier is 0x1593f630

$ cat image-root/boot/grub/grub.cfg
linux /boot/bzImage quiet init=/bin/sh root=PARTUUID=1593f630-01
boot

I use Debian 8.

tks

[MichielDerhaeg]

Could you do fdisk -l image and give me the output?

[Srl3nny]

The fdisk -l is

sudo fdisk -l image

Disco image: 400 MiB, 419430400 bytes, 819200 setores
Unidades: setor de 1 * 512 = 512 bytes
Tamanho de setor (lógico/físico): 512 bytes / 512 bytes
Tamanho E/S (mínimo/ótimo): 512 bytes / 512 bytes
Tipo de rótulo do disco: dos
Identificador do disco: 0x1593f630

Device Boot Start End Sectors Size Id Type
image1 2048 819199 817152 399M 83 Linux

[MichielDerhaeg]

Weird, looks like the kernel doesn't know what to do with the filesystem or the disk interface. Did you configure your kernel differently? Launched qemu with different options?

[Srl3nny]

Hi Michiel

I configure the kernel and launched qemu like your tutorial, I'll try again later in my workstation that has a Ubuntu 16.04 and tell here the result.

tks

[kbumsik]

Hi Michiel,
I have exactly same problem with PARTUUID. But I changed it to root=/dev/sda1 and it works.
I use Ubuntu Gnome 16.04.2 LTS on VMware Workstation though.

[guinanseyebrows]

I also experienced kernel panics during boot. I reformatted my loop device as ext3 and it worked perfectly, so maybe my .config wasn't working properly with ext4 support. odd, but i'm not too worried about that for now. i'm building this on void musl.

[Srl3nny]

I use Ubuntu 16.04 and it work.
But i can't install the bootloader, I get the error

grub-install: erro: /usr/lib/grub/i386-pc/modinfo.sh doesn't exist. Please specify --target or --directory.

I think that is because the grub packages in my machine:
grub-common, grub-efi-amd64, grub-efi-amd64-bin, grub-efi-amd64-signed, grub2-common

I used QEMU to load the kernel, and work, now I can continue.

[MichielDerhaeg]

That error happens because you need the grub-pc-bin package.

[Srl3nny]

Ok, bootloader installed.
Tks