Bug 15976

Summary:	Kernel Panic (VFS: unable to mount root fs on unknown-block(0,0)
Product:	Mageia	Reporter:	René Lagoni Neukirch <rene>
Component:	Release (media or process)	Assignee:	Mageia Bug Squad <bugsquad>
Status:	RESOLVED DUPLICATE	QA Contact:
Severity:	critical
Priority:	Normal	CC:	gamiro97, sysadmin-bugs, thierry.vignaud
Version:	5	Keywords:	NEEDINFO
Target Milestone:	---
Hardware:	x86_64
OS:	Linux
Whiteboard:
Source RPM:	kernel, dracut	CVE:
Status comment:
Attachments:	"Screendump" The boot according to the e option.

Description René Lagoni Neukirch 2015-05-18 21:22:16 CEST

Description of problem:
The kernel goes into panic on boot

Version-Release number of selected component (if applicable):
Mageia 5 RC kernel 3.19

How reproducible:
Every boot.


Steps to Reproduce:
1. Boot
2.
3.

Pls. Note: On almost every other previous release the panic problem has been present - maybe it is NOT a kernel issue but an init issue ...

Reproducible: 

Steps to Reproduce:

Comment 1 Thierry Vignaud 2015-05-18 21:23:30 CEST

Please attach a screenshot of the kernel panic

Keywords: (none) => NEEDINFO
CC: (none) => thierry.vignaud
Source RPM: Mageia 5 RC => kernel, dracut

Comment 2 René Lagoni Neukirch 2015-05-18 21:25:29 CEST

(In reply to Thierry Vignaud from comment #1)
> Please attach a screenshot of the kernel panic

How on earth do I do that the machine doesn't even boot ???

Comment 3 René Lagoni Neukirch 2015-05-18 21:33:46 CEST

(In reply to René Lagoni Neukirch from comment #2)
> (In reply to Thierry Vignaud from comment #1)
> > Please attach a screenshot of the kernel panic
> 
> How on earth do I do that the machine doesn't even boot ???

The panic is something like - VFS: Unable to mount root FS on unknown block (0,0)

Comment 4 René Lagoni Neukirch 2015-05-18 22:08:42 CEST

(In reply to René Lagoni Neukirch from comment #3)
> (In reply to René Lagoni Neukirch from comment #2)
> > (In reply to Thierry Vignaud from comment #1)
> > > Please attach a screenshot of the kernel panic
> > 
> > How on earth do I do that the machine doesn't even boot ???
> 
> The panic is something like - VFS: Unable to mount root FS on unknown block
> (0,0)

FWIW: I did an upgrade from Mageia 4 til Mageia 5, i.e not a full installation from scratch.

Comment 5 Samuel Verschelde 2015-05-19 09:09:29 CEST

(In reply to René Lagoni Neukirch from comment #2)
> (In reply to Thierry Vignaud from comment #1)
> > Please attach a screenshot of the kernel panic
> 
> How on earth do I do that the machine doesn't even boot ???

Well, most people figure they can use a camera for that :)

Comment 6 René Lagoni Neukirch 2015-05-19 17:37:28 CEST

Created attachment 6580 [details]
"Screendump"

Picture as requested ....

Comment 7 Thierry Vignaud 2015-05-19 19:14:43 CEST

Probably a bogus bootloader config.
What is your boot loader? lilo? grub? grub2?

Summary: Kernel Panic => Kernel Panic (VFS: unable to mount root fs on unknown-block(0,0)

Comment 8 René Lagoni Neukirch 2015-05-19 21:33:19 CEST

(In reply to Thierry Vignaud from comment #7)
> Probably a bogus bootloader config.
> What is your boot loader? lilo? grub? grub2?

Tried to reply to the mail, but it bounced ...


GRUB2

FWIW - Tried on my other (and newer) platform - no problems whatsoever.

Comment 9 Thierry Vignaud 2015-05-19 22:03:44 CEST

Can you use "e" in grub2 to look at kernel options?

Comment 10 René Lagoni Neukirch 2015-05-20 21:27:32 CEST

Created attachment 6597 [details]
The boot according to the e option.

I did an upgrade twice from M4 to M5RC - one on my oldest platform and one on my youngest. The latter succeeded the first DID NOT.
Both 64 bit, both with Grub2, both with kernel 3.19.
The old platform still works with mga4 boot images.

Comment 11 René Lagoni Neukirch 2015-05-20 21:54:38 CEST

(In reply to René Lagoni Neukirch from comment #10)
> Created attachment 6597 [details]
> The boot according to the e option.
> 
> I did an upgrade twice from M4 to M5RC - one on my oldest platform and one
> on my youngest. The latter succeeded the first DID NOT.
> Both 64 bit, both with Grub2, both with kernel 3.19.
> The old platform still works with mga4 boot images.

I just did an update (from the mga5 medias ofcourse) among these a lot of drak... tools.
Now even my older platform works fine.

Comment 12 Thierry Vignaud 2015-05-21 06:05:59 CEST

Closing then.
I think that could be a side effect of bug #15984

*** This bug has been marked as a duplicate of bug 15984 ***

Status: NEW => RESOLVED
Resolution: (none) => DUPLICATE

Comment 13 bolak T 2015-06-22 01:06:36 CEST

I tried to boot my system from the final/released LiveCD

Mageia-5-LiveCD-KDE4-en-i586-CD.iso

and right at boot the kernel panic happenned with this message: 

"Kernel Panic (VFS: unable to mount root fs on unknown-block(0,0) "

I have never had this problem with the live CDs of Mageia 3 and 4 on the same 
system.

This means that this bug was not fixed for all the released ISOs.

CC: (none) => gamiro97

Comment 14 Rémi Verschelde 2015-06-22 01:11:11 CEST

Reopening as per comment 13, and re-closing bug 15984.

Status: RESOLVED => REOPENED
Resolution: DUPLICATE => (none)

Comment 15 bolak T 2015-06-25 09:38:48 CEST

Changing release version to 5, as per comment 13.

Is there a plan to re-release the affected ISO(s)?

Version: Cauldron => 5

Comment 16 Thierry Vignaud 2015-06-25 10:41:37 CEST

That's a different issue (first was a bogus bootloader configuration in _installed_ system whereas you're talking about booting live ISO)
Please open a new bug report.

Status: REOPENED => RESOLVED
Resolution: (none) => FIXED

Comment 17 Thierry Vignaud 2015-06-25 10:46:35 CEST

Proper status

*** This bug has been marked as a duplicate of bug 15984 ***

Resolution: FIXED => DUPLICATE