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[OPEN] kernel panic at boot

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poisson888
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[OPEN] kernel panic at boot

Post by poisson888 » Sun Sep 01, 2019 9:47 pm

Helo
Arcolinux has a error on booting it s say :
"kernel panic not syncing : VFS unable to mount fs on unknow-block"
i can only go on with the "fallback initramfs" option, then it boot normaly
what happend?
thanks

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erikdubois
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Re: [OPEN] kernel panic at boot

Post by erikdubois » Mon Sep 02, 2019 6:11 am

It is often because you have a multi boot system.

Just use one operating system per harddisk or ssd.
Learn, have fun and enjoy.
But first use the power of the Arch Wiki
use the tutorials on https://www.youtube.com/erikdubois
then use the power of google
then use the power of our moderators.

poisson888
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Re: [OPEN] kernel panic at boot

Post by poisson888 » Mon Sep 02, 2019 8:52 pm

does'nt happend with other system, only Arch, let see if Manjara has also a bug...

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Re: [OPEN] kernel panic at boot

Post by JustaBob » Tue Sep 03, 2019 8:33 am

Having fought that one, it should be no surprise to you that Eric is correct that if you don't have any other systems on the drive you boot off of, there won't be a problem in the first place.

If you want to install other OS(s), then you need to let one of the Arch based distros control the boot. The Arch based system will find the other distros, and they will be able to boot, but if you let one of the other distros control the boot, many times the Arch distro's will not be able to boot.

My system is not UEFI, and has Debian and Arch based distros on the drive. I don't think this idea would work the same if it was a UEFI system, so don't try it. The system controlling the boot was a Debian based system, and neither ArcoLinuxD nor Manjaro would boot, both getting a similar error to yours...

This post worked partially for Manjaro for me to get me booted into Manjaro. Once there I was able to let Manjaro (an Arch distro) control the boot, and then I was able to boot ArcoLinux from the Manjaro grub entry for it.

I suspect that if no manjaro was involved, the instructions could be altered to look for "arch-release" instead of "manjaro-release"
https://forum.manjaro.org/t/kernel-pani ... ot/42803/6

Once I was booted into ArcoLinux, I needed to put ArcoLinux back in control of the boot.
And this post provided the other part, because ArcoLinux doesn't have the update-grub script, so you need to run it by hand
https://unix.stackexchange.com/question ... arch-linux

My boot drive is /dev/sda. My commands are based on that. Once booted to ArcoLinux from the Manjaro grub menu, in a terminal I did:

sudo grub-install --force /dev/sda
sudo grub-mkconfig -o /boot/grub/grub.cfg

if everything worked, I reboot

and the ArcoLinux boot menu came up including the Manjaro, Arco, and Debian based distros.

The moral of the story is that every time you install an OS it will probably want to take over controlling the boot, and that might not be a good thing for the other distros on the drive.

Eric, if you don't like this post, I won't get upset if you delete it... I'm just trying to help him since its the same problem I just had myself.

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erikdubois
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Re: [OPEN] kernel panic at boot

Post by erikdubois » Tue Sep 03, 2019 8:08 pm

It is a great post.
Thanks for the assist.
Learn, have fun and enjoy.
But first use the power of the Arch Wiki
use the tutorials on https://www.youtube.com/erikdubois
then use the power of google
then use the power of our moderators.

poisson888
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Re: [OPEN] kernel panic at boot

Post by poisson888 » Thu Sep 12, 2019 11:46 am

yes it s great post and it is what happen in general, evey new instaled distro take over the boot

actualy when i instaled the last one, the manjaro, all went well, it shows all the distros and it boot fine,
then i changes with the booloader Grub Customizer , for the debian distro on first, and this error shows up , the one i post before!
Now i gave the arco first boot with grub customizer and it reconize all the 8 distro, just cannot boot on arco and manjaro directly to the normal sda where they are installed, i have to boot on the "fallback initramfs"
i saw this problem on diferent forum , but didnt found the right answer yet

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Jibel
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Re: [OPEN] kernel panic at boot

Post by Jibel » Sun Dec 01, 2019 4:13 pm

JustaBob wrote:
Tue Sep 03, 2019 8:33 am
Having fought that one, it should be no surprise to you that Eric is correct that if you don't have any other systems on the drive you boot off of, there won't be a problem in the first place.

If you want to install other OS(s), then you need to let one of the Arch based distros control the boot. The Arch based system will find the other distros, and they will be able to boot, but if you let one of the other distros control the boot, many times the Arch distro's will not be able to boot.

My system is not UEFI, and has Debian and Arch based distros on the drive. I don't think this idea would work the same if it was a UEFI system, so don't try it. The system controlling the boot was a Debian based system, and neither ArcoLinuxD nor Manjaro would boot, both getting a similar error to yours...

This post worked partially for Manjaro for me to get me booted into Manjaro. Once there I was able to let Manjaro (an Arch distro) control the boot, and then I was able to boot ArcoLinux from the Manjaro grub entry for it.

I suspect that if no manjaro was involved, the instructions could be altered to look for "arch-release" instead of "manjaro-release"
https://forum.manjaro.org/t/kernel-pani ... ot/42803/6

Once I was booted into ArcoLinux, I needed to put ArcoLinux back in control of the boot.
And this post provided the other part, because ArcoLinux doesn't have the update-grub script, so you need to run it by hand
https://unix.stackexchange.com/question ... arch-linux

My boot drive is /dev/sda. My commands are based on that. Once booted to ArcoLinux from the Manjaro grub menu, in a terminal I did:

sudo grub-install --force /dev/sda
sudo grub-mkconfig -o /boot/grub/grub.cfg

if everything worked, I reboot

and the ArcoLinux boot menu came up including the Manjaro, Arco, and Debian based distros.

The moral of the story is that every time you install an OS it will probably want to take over controlling the boot, and that might not be a good thing for the other distros on the drive.

Eric, if you don't like this post, I won't get upset if you delete it... I'm just trying to help him since its the same problem I just had myself.
Many thanks to JustaBob,
I have exactly the same trouble since 4 days ! I have 2 another OSs installed. When I would like restart arco KDE B impossible. It's exactly the same for start arco I use the last line with fallback etc, Impossible but true. But if arch or manjaro provoke this trouble ? May be? I'm not sure? But with manjaro I have the same problem. If I have 3/4 OSs installed in the hardisk and I would like install manjaro(example) last one very close! No trouble ! Every is OK . But I want to install another OS behind manjaro? This is the real trouble, impossible to start manjaro ! ! ! But after install manjaro except in dualboot . no trouble. For manjaro it's necessary install it the last one ,yes last one Manjaro stay the "king" first one in the hardisk... Very bad.... but now find the revolved for that ??? :? :cry:
hello 8-)
But I use 12 OSs free , installed on my PC on 4 hard disk + only one Windaube7 times in times :lol:
"More big is the front, more big are the back"

batjka911
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Re: [OPEN] kernel panic at boot

Post by batjka911 » Mon Dec 02, 2019 8:31 am

Try this variant for MBR
1. Installing the first (any) system (example on /dev/sda1) - bootloader in /dev/sda.
2. Installing the second system on /dev/sda2 - bootloader in /dev/sda2.
3. Return to the first system - update the bootloader.
My goal is a Linux laptop no worse than a MacBook.

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Jibel
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Re: [OPEN] kernel panic at boot

Post by Jibel » Mon Dec 02, 2019 10:10 am

batjka911 wrote:
Mon Dec 02, 2019 8:31 am
Try this variant for MBR
1. Installing the first (any) system (example on /dev/sda1) - bootloader in /dev/sda.
2. Installing the second system on /dev/sda2 - bootloader in /dev/sda2.
3. Return to the first system - update the bootloader.
Hi batjka911,
It's exact , but for to be honest I do exactly like this. If I have just one OS or a second in dualboot no trouble ! But with ArcoB or Manjaro it's same thing. Except if many people are in multiboot... If I have install arco in last, no trouble ...But if I want to install another OS behind ArcoB 3/4 position the trouble are exactly the same Aie aie ! If an OS necessity to be first one in a hard disk ? This is a big trouble ... Many thanks batjka911 see you soon next times 8-)
hello 8-)
But I use 12 OSs free , installed on my PC on 4 hard disk + only one Windaube7 times in times :lol:
"More big is the front, more big are the back"

batjka911
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Location: Kaliningrad(Russia)
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Re: [OPEN] kernel panic at boot

Post by batjka911 » Mon Dec 02, 2019 11:23 am

Perhaps this is a problem debian-based distro GRUB

You can try this.
My goal is a Linux laptop no worse than a MacBook.


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