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Old 10-18-2016, 10:37 PM   #1
jviezel
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kernel panic-not syncing: VFS: unable to mount root fs - KUBUNTU v14


I was running Kubuntu v14 (I think) just fine on a home built desktop. I applied the most recent updates and all of the sudden, when I try to boot the machine, it is going into a black screen with a bunch of dump codes ending in the following:

"kernel panic-not syncing: VFS: unable to mount root fs on
unknown block(0,0)"

Does anyone have any idea what the problem might be or how I can diagnose and recover?

I really don't want to have to go through a re-installation of the OS.
 
Old 10-18-2016, 10:44 PM   #2
Emerson
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Probably kernel upgrade gone wrong. Boot with backup kernel and repeat kernel upgrade.
 
Old 10-19-2016, 04:24 PM   #3
jviezel
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Thank you - any pointer to where I might be able to find detailed instructions on how to do this?
 
Old 10-19-2016, 09:24 PM   #4
syg00
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Ubuntu should keep 3 kernels I would think. Do you get a boot menu ?
- if so, simply use the arrow keys and select an older kernel
- if not, try hitting the <Shift> or <Esc> key while the screen is blank after a power-on. Proceed as above.

If that works, we can proceed - probably need a re-generated initrd/initramfs. First you should probably to currently supported version.
 
Old 10-29-2016, 03:20 PM   #5
jviezel
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Able to now boot OS but how do I fix broken kernel?

Thank you so much for your help. I selected an older version of the kernel and I'm now able to boot into my OS.

I ran apt-get upgrade again and it seems to try to update the kernel. However, when ever I try to boot the newer kernel, I get the same panic error. Is there a way to fix this so that I am able to boot the newer kernel or will I forever be required to boot an older version of the kernel?
 
Old 10-29-2016, 05:58 PM   #6
Drakeo
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not syncing means the /etc/fstab is not in sync. Why you need to load the modules to read "blkid" command at start up script. because obviously it is unable to read the file system and that means you need to learn how to buld the kernel to read the file systems you want it to sync with and make sure the "blkid" matches your /etc/fstab keep it simple

Last edited by Drakeo; 10-29-2016 at 06:00 PM. Reason: sorry I am working dyslexic that is not a joke miss spell
 
Old 11-12-2016, 02:42 PM   #7
jviezel
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Figured out the problem

Thanks everyone who helped.
Turns out the problem was not enough space in my /boot directory. I used apt-get to remove some of the older kernels and the upgrade worked after that. I'm back up and running on Kubuntu 16.04.
 
  


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