kernel panic after dual boot install

almandin · 2015-01-16 21:51:35

Hello,

I've just installed an other distro (kali) next to my archlinux, using a live USB for kali.
To do this I have resized my /home partition (I had / partition, /boot, and a /home partition) removing 100GB from it for my new linux.
I did this with gparted, and I actually have this scheme :
http://img15.hostingpics.net/pics/94249 … 222919.png

Kali linux is installed, but now archlinux doesn't boot : kernel panic not syncing vfs unable to mount root fs on unknown-block(0,0)

I suspect grub not to link correctly each system with each partition, but I don't see why, because partitions have not moved (just one partition more for kali at the end, sda6)

I have my grub.cfg file too on pastebin, I tried to reinstall my archlinux kernel from an archlinux live usb, but the problem is still here.
http://pastebin.com/W8FUbJEQ

Thx a lot for your help, I don't know what to do

Last edited by almandin (2015-01-16 21:52:21)

alex.theoto · 2015-01-17 17:54:22

Boot at Kali and on a terminal give us the output of 'ls -l /dev/disk/by-uuid/'

Last edited by alex.theoto (2015-01-17 17:54:39)

almandin · 2015-01-17 18:01:41

ls -l /dev/disk/by-uuid

lrwxrwxrwx 1 root root 10 janv. 17 18:52 09b42b35-f475-43bb-95de-a1a047fed02f -> ../../sda2
lrwxrwxrwx 1 root root 10 janv. 17 18:52 481c8df4-71dd-4d7b-afd2-952d549b51a0 -> ../../sda5
lrwxrwxrwx 1 root root 10 janv. 17 18:52 aaf3ce21-9385-4d92-a994-47482c681b1d -> ../../sda6
lrwxrwxrwx 1 root root 10 janv. 17 18:52 b5ee746e-2376-4dbc-8ec2-d4407c0ec168 -> ../../sda3
lrwxrwxrwx 1 root root 10 janv. 17 18:52 d173cffb-2ca4-42bf-9e39-2a7f1a8dbd8c -> ../../sda1

thx

Head_on_a_Stick · 2015-01-17 18:02:48

The grub.cfg is identifying /dev/sda1 as your Arch root partition when it should be /dev/sda3 (?):

Pastebin wrote:

menuentry "Arch Linux (on /dev/sda3)" --class gnu-linux --class gnu --class os {
        insmod part_msdos
        insmod ext2
     ***set root='(hd0,msdos1)'***
        search --no-floppy --fs-uuid --set=root d173cffb-2ca4-42bf-9e39-2a7f1a8dbd8c
        linux /vmlinuz-linux root=UUID=b5ee746e-2376-4dbc-8ec2-d4407c0ec168 rw acpi_osi=Linux acpi_backlight=vendor quiet
        initrd /intel-ucode.img
}

Try changing it to '(hd0,msdos3)', or wherever your Arch root is (and also change the UUID on the next line to the correct one).

Or you could re-install GRUB from Arch and see if that does a better job of it.

EDIT: No, sorry that's wrong -- I missed the bit where you said you have a separate /boot for Arch as well

Try my second suggestion then...

Are you sharing the same /boot between Arch & Kali?

Last edited by Head_on_a_Stick (2015-01-17 18:06:39)

almandin · 2015-01-17 18:16:59

I have the same /boot for kali and for arch, (/dev/sda1 is my /boot partition)
I have already tried to change msdos1 into msdos3, and the uuid, and it did nothing
I'll try to reinstall grub so, I just hope that will not mess up my kali too ^^"

Last edited by almandin (2015-01-17 18:22:36)

alex.theoto · 2015-01-17 19:17:41

I remember something similar to your problem when I used encrypted /. When I used two distros with encrypted / and with a single /boot partition I had the same problem.
To solve the problem, I created two /boot partitions, one for each one.

One solution is to create a second /boot partition and config each distro to use one of them.
Another solution [and easier] is to do not use separate /boot partition. Just merge it on your / partition.

As for the config, use their live cd to create grub menu. Don't forget to use 'os-prober' at Arch.

Last edited by alex.theoto (2015-01-17 19:23:49)

Head_on_a_Stick · 2015-01-17 19:30:47

I agree with @alex.theoto -- I use GRUB in my Debian system to boot my laptop in non-EFI mode and because I have shared /boot (ESP) between Arch & Debian it makes a total mess of it (entries to boot Arch with the Debian kernel & vice-versa) and I always have to manually re-write the grub.cfg

almandin · 2015-01-18 14:19:20

If I use this partition scheme :
one partition for kali (/boot included)
one partition for arch (/boot included)
one partition for my /home

I don't understand how the system know what /boot use (if both partitions for kali and arch are *boot* flagged), if I have two grubs installed :x (I'm maybe saying sh*t)
I don't understand how it can works if there are two grub.cfg files ^^"

Can I install grub only once, while installing two different Linux ? I guess yes ^^

Last edited by almandin (2015-01-18 14:56:10)

Head_on_a_Stick · 2015-01-18 17:58:00

almandin wrote:

Can I install grub only once, while installing two different Linux ? I guess yes ^^

That's what I usually do -- just install new distributions without bootloaders and then run `grub-mkconfig` from the original system afterwards (or write my own entry for stuff like Android that doesn't register in os-prober).

The last `grub-install` that was performed is the "active" version: this is the one that occupies the MBR (or BIOS boot partition, or active NVRAM entry) and hence controls the booting process.

Last edited by Head_on_a_Stick (2015-01-18 17:58:54)

ewaller · 2015-01-18 18:22:10

Expanding on Head_on_a_Stick's post...

But, the kernel has to have a different name. Also, if you use an initrd, then the names of the images have to be different as well.
This system currently has Arch, Arch Falback, Gentoo, Windows 7 and FreeDOS. Based on what H_o_a_S wrote in another thread, mayhaps that Gentoo partition will turn to an Android partition later today

almandin · 2015-01-18 22:07:33

okay okay thx a lot, I understand now, where the problem comes from, I installed my second linux with grub too into a /boot partition where grub was already here, that's the problem I think.
I now have all I need to do a clean dual boot for my laptop.
thx for your help, I'll let this post there and reinstall all I need

edit:: i'm sorry for my poor english btw, I know I make a lot of mistakes but i'm learning ^^"

Last edited by almandin (2015-01-18 22:10:44)

Arch Linux

#1 2015-01-16 21:51:35

kernel panic after dual boot install

#2 2015-01-17 17:54:22

Re: kernel panic after dual boot install

#3 2015-01-17 18:01:41

Re: kernel panic after dual boot install

#4 2015-01-17 18:02:48

Re: kernel panic after dual boot install

#5 2015-01-17 18:16:59

Re: kernel panic after dual boot install

#6 2015-01-17 19:17:41

Re: kernel panic after dual boot install

#7 2015-01-17 19:30:47

Re: kernel panic after dual boot install

#8 2015-01-18 14:19:20

Re: kernel panic after dual boot install

#9 2015-01-18 17:58:00

Re: kernel panic after dual boot install

#10 2015-01-18 18:22:10

Re: kernel panic after dual boot install

#11 2015-01-18 22:07:33

Re: kernel panic after dual boot install

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