[gentoo-user] Help : need grub,conf file : kernel wouldn't boot

[gentoo-user] Help : need grub,conf file : kernel wouldn't boot

[Rohit and Bhavana]

Hi all,

I have built my kernel 2.6.15-r5 [not the latest I know but should
support all that I have].
I am unable to boot it. It stops looking for root device when booting.
Corresponding line from my grub,conf is title Linux-latest

kernel (hd0,2)/kernel-genkernel-x86-2.6.15-gentoo-r5 root=/dev/ram0
real_root=/dev/hda2 init=/linuxrc vga=7 CONSOLE=/dev/tty1
initrd (hd0,2)/initramfs-genkernel-x86-2.6.15-gentoo-r5

and from ls -tlr /boot/*2.6.15*

-rw-r--r-- 1 root root 1563446 Mar 27 23:07
/boot/kernel-genkernel-x86-2.6.15-gentoo-r5
-rw-r--r-- 1 root root  597790 Mar 27 23:07
/boot/System.map-genkernel-x86-2.6.15-gentoo-r5
-rw-r--r-- 1 root root 1016367 Mar 27 23:10
/boot/initramfs-genkernel-x86-2.6.15-gentoo-r5

So I am quite sure I have the files that I need. Not sure what I might
be missing, so request you to please send me files at
rohit.sharma@iitbombay.org [don't worry about multiples please - shall
really be thankful to see what you guys have and to may be learn from it].

I have the same problem with my existing kernel also. It loads initially
a lot of module, but when it comes to booting my root partition,
/dev/hda2 it just sits and waits after an error saying that couldn't
find a bootable device.

Then I type /dev/hda2 manually on the same [grub] prompt and the machine
boots fine, this is where I am writing to you from.

Regards,
Rohit

PS - If someone wishes, I could send you my own .config to look at.
Didn't want to send that to the list. Thanks for asking.
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[gentoo-user] Re: Help : need grub,conf file : kernel wouldn't boot

[Francesco Talamona]

On Saturday 15 April 2006 14:53, Rohit and Bhavana wrote:
> So I am quite sure I have the files that I need.

1) Are you aware that you are using a comma inside the file name in the 
subject and in the message? It sould be grub.conf, not grub,conf.

What name do you use in the filesystem?

2) are you sure (hd0,2) is /dev/hda2? IIRC hda2 translates to (hd0,1) 

Ciao
	Francesco

-- 
Linux Version 2.6.16-gentoo-r1, Compiled #3 PREEMPT Sat Apr 1 11:48:45 
CEST 2006
One 2.2GHz AMD Athlon 64 Processor, 2GB RAM, 4416.11 Bogomips Total
aemaeth
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Re: [gentoo-user] Re: Help : need grub,conf file : kernel wouldn't boot

[Rohit Sharma]

Francesco Talamona wrote:

>1) Are you aware that you are using a comma inside the file name in the  subject and in the message? It sould be grub.conf, not grub,conf.
>  
>
Yes Francesco, the comma was a typo on my part.  Things are they way I
have tried to convey, on my machine.

>What name do you use in the filesystem?
>2) are you sure (hd0,2) is /dev/hda2? IIRC hda2 translates to (hd0,1) 
>  
>
You are right. What I meant to say is that my / is /dev/hda2 and /boot
is /dev/hda3 [which should be consistent with what I said].

The problem that I have, can be more concisely put this way. Grub won't
honour real_root=/dev/hda2 from my conf file and after mounting /boot
kernel does it's business and waits for real_root. Grub/ kernel ? fail
here and say that they can not detect /dev/hda2 and ask me for the root
device.

I type /dev/hda2 by hand, every time I boot, and it happily continues
booting the rest of the box from there.

Thanks,
Rohoit
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[gentoo-user] Re: Help : need grub,conf file : kernel wouldn't boot

[Regis Decamps]

Rohit and Bhavana wrote:

 > Hi all,
 >
 > I have built my kernel 2.6.15-r5 [not the latest I know but should
 > support all that I have].
 > I am unable to boot it. It stops looking for root device when booting.
 > Corresponding line from my grub,conf is title Linux-latest
 >
 > kernel (hd0,2)/kernel-genkernel-x86-2.6.15-gentoo-r5 root=/dev/ram0
 > real_root=/dev/hda2 init=/linuxrc vga=7 CONSOLE=/dev/tty1
 > initrd (hd0,2)/initramfs-genkernel-x86-2.6.15-gentoo-r5
 >

I have both root= and real_root=

title Gentoo
         kernel (hd0,0)/vmlinuz real_root=/dev/sda5 root=/dev/sda5 
gentoo=nodevfs vga=0x317
         initrd (hd0,0)/initramfs-gentoo


Good luck,
-- 
Régis
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Re: [gentoo-user] Re: Help : need grub,conf file : kernel wouldn't boot

[Robert Crawford]

On Sunday 16 April 2006 13:46, Regis Decamps wrote:
> Rohit and Bhavana wrote:
>  > Hi all,
>  >
>  > I have built my kernel 2.6.15-r5 [not the latest I know but should
>  > support all that I have].
>  > I am unable to boot it. It stops looking for root device when booting.
>  > Corresponding line from my grub,conf is title Linux-latest
>  >
>  > kernel (hd0,2)/kernel-genkernel-x86-2.6.15-gentoo-r5 root=/dev/ram0
>  > real_root=/dev/hda2 init=/linuxrc vga=7 CONSOLE=/dev/tty1
>  > initrd (hd0,2)/initramfs-genkernel-x86-2.6.15-gentoo-r5

Do you have ANY kernel that does boot on this system?  If so, or even if not, 
post a copy of your entire grub.conf, and your /etc/fstab file, so we can see 
how your system partitions are set up.  Is there an error message, like error 
17, or some other number?

I think your (hd0,2) and root=dev/hd2 are probably wrong.

If you installed Gentoo following the Docs, your /boot should be hda1, swap 
hda2, and / hda3.
Your grub should be installed on the MBR, and grub.conf should look something 
like this, set up with no splash framebuffer:

title=[Evo-2.6.16-beyond1]
root (hd0,0)
kernel /boot/2.6.16-beyond1 root=/dev/hda3

With a splash framebuffer, something like this:

title=Gentoo [Evolution-Mission]
root (hd0,0) # boot partition
kernel /vmlinuz-2.6.15-archck root=/dev/hda3 
video=vesafb:1024x768-16@72,mtrr,ywrap splash=silent,fadein,theme:default 
quiet console=tty1
initrd (hd0,0)/fbsplash-default

Robert Crawford.
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