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Date: Wed, 25 Apr 2012 23:30:04 +0200
From: Florian Philipp <lists@binarywings.net>
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Subject: Re: [gentoo-user] 3.2.12 Kenel wont boot
References: <loom.20120425T174735-922@post.gmane.org> <4F9864BA.2030704@gmail.com>
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Am 25.04.2012 22:55, schrieb Dale:
> James wrote:
>> Hello,
>>
>> OK, I manage quite a few gentoo systems.
>> ONE of them is being a BIT _ _ ! and I cannot
>> figure out what is obviously simple....
>>
>> I have already migrated most system that I manage
>> to the 3.2.12 kernel (not testing kernels for me
>> at this time).
>>
>> Background: The system is an old HP AMD dual core laptop:
>> AMD Turion(tm) 64 X2 Mobile Technology TL-56
>>
>> The error message is this:
>>
>> Root-NFS: no NFS server address
>> VFS: Unable to mount root fs via NFS, try floppy
>> VFS: Cannot open root device "sda4" or unknown block (2,0)
>> Please append a correct "root=3D" boot option;
>> here are the available partitions:
>> oboo 1048575 sr0 driver:sr
>>
>> Kernel panic - not syncing : VFS : Unable to
>> mount root fs on unknown block(2,0)
>> PID:1,comm : swapper /0=20
>> Not tainted 3.2.12-gentoo#2
>>
>> The other (3) series kernels boot and run just fine:
>> from grub.conf:
>> #0
>> title=3D Linux 3.2.1-gentoo
>> root(hd0,1)
>> kernel /boot/kernel-3.2.1-gentoo root=3D/dev/sda4
>> #1
>> title=3D Linux 3.2.12-gentoo
>> root(hd0,1)
>> kernel /boot/kernel-3.2.12-gentoo root=3D/dev/sda4
>> #2
>> title=3D Linux 3.0.6-gentoo
>> root(hd0,1)
>> kernel /boot/kernel-3.0.6-gentoo root=3D/dev/sda4
>>
>> I can even scp over a kernel from a single processor AMD64
>> laptop and it boots and runs just fine.
>>
>>
>> When I make a new kernel, I do what I have done for years
>> with Gentoo:
>>
>> cd /usr/src
>> rm linux
>> ln -sf <latest.kernel> linux
>> cd linux
>> make menuconfig <save any changes>
>> make && make models_install
>>
>> cp System.map /boot/System.map-3.2.12-gentoo
>> cp arch/x86_64/boot/bzImage /boot/kernel-3.2.12-gentoo
>> cp .config /boot/config-3.2.12-gentoo
>>
>>
>> So all I can think of is NFS is the difference?
>> I cannot seem to flesh out way the new kernel will
>> not boot on this system and many others are just fine....
>>
>> maybe I'm missing support for the "sr" driver ?
>>
Like Simon said, sr is your optical drive. I guess you are missing
something in the HDD driver stack. Maybe you should post your kernel
config and lspci.
Or, like Simon suggested, the drives don't spin up fast enough.
>=20
> OK. I'm used to looking for something stupid that I do so I can't help=
> but notice something missing. In the list of commands for the new
> kernel, I notice the command to copy the old config over is missing.
> You did copy the config over right?
>=20
Thought the same. Using `make oldconfig` is also highly recommended.
> When I run into this, it's because I forgot to put the root file system=
> type in the kernel. Example: The root partition has ext3 and I forgot=
> to build it into the kernel. Some people out of habit build it has a
> module which also doesn't work. ^_^
>=20
I think that is a different error ("unknown super block", "unsupported
features" or something similar).
> Also, make sure the stage files are in /boot too.
>=20
> Hope that helps.
>=20
> Dale
>=20
> :-) :-)
>=20
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