Kernel panic - not syncing: Attempted to kill init!

[melter]

Installed Mythbuntu 10.04 Desktop i386 on to sata hard drive of the AMD64 machine and installed all updates. Everything worked just fine. After copying the installation to nfs server (followed document https://help.ubuntu.com/community/DisklessUbuntuHowto) then network booting failed resulting kernel panic. But if the sata drive isn't removed from the machine network boot works fine.

lsb_release -rd
server:
Description: Ubuntu 10.04.1 LTS
Release: 10.04

client:
Description: Ubuntu 10.04.1 LTS
Release: 10.04

uname -a:
server:
Linux XXX 2.6.32-25-generic #44-Ubuntu SMP Fri Sep 17 20:05:27 UTC 2010 x86_64 GNU/Linux

client:
Linux XXX 2.6.32-25-generic #44-Ubuntu SMP Fri Sep 17 20:26:08 UTC 2010 i686 GNU/Linux

client (while hard drive attached):
$ lspci -k
00:00.0 Memory controller: nVidia Corporation CK804 Memory Controller (rev a2)
00:01.0 ISA bridge: nVidia Corporation CK804 ISA Bridge (rev a2)
00:01.1 SMBus: nVidia Corporation CK804 SMBus (rev a2)
        Kernel driver in use: nForce2_smbus
        Kernel modules: i2c-nforce2
00:02.0 USB Controller: nVidia Corporation CK804 USB Controller (rev a2)
        Kernel driver in use: ohci_hcd
00:02.1 USB Controller: nVidia Corporation CK804 USB Controller (rev a2)
        Kernel driver in use: ehci_hcd
00:04.0 Multimedia audio controller: nVidia Corporation CK804 AC'97 Audio Controller (rev a2)
        Kernel driver in use: Intel ICH
        Kernel modules: snd-intel8x0
00:06.0 IDE interface: nVidia Corporation CK804 IDE (rev f2)
        Kernel driver in use: pata_amd
        Kernel modules: pata_amd
00:07.0 IDE interface: nVidia Corporation CK804 Serial ATA Controller (rev f2)
        Kernel driver in use: sata_nv
        Kernel modules: sata_nv
00:08.0 IDE interface: nVidia Corporation CK804 Serial ATA Controller (rev f2)
        Kernel driver in use: sata_nv
        Kernel modules: sata_nv
00:09.0 PCI bridge: nVidia Corporation CK804 PCI Bridge (rev a2)
00:0a.0 Bridge: nVidia Corporation CK804 Ethernet Controller (rev a2)
        Kernel driver in use: forcedeth
        Kernel modules: forcedeth
00:0b.0 PCI bridge: nVidia Corporation CK804 PCIE Bridge (rev a2)
        Kernel driver in use: pcieport
        Kernel modules: shpchp
00:0c.0 PCI bridge: nVidia Corporation CK804 PCIE Bridge (rev a2)
        Kernel driver in use: pcieport
        Kernel modules: shpchp
00:0d.0 PCI bridge: nVidia Corporation CK804 PCIE Bridge (rev a2)
        Kernel driver in use: pcieport
        Kernel modules: shpchp
00:0e.0 PCI bridge: nVidia Corporation CK804 PCIE Bridge (rev a2)
        Kernel driver in use: pcieport
        Kernel modules: shpchp
00:18.0 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] HyperTransport Technology Configuration
00:18.1 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] Address Map
00:18.2 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] DRAM Controller
00:18.3 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] Miscellaneous Control
        Kernel driver in use: k8temp
        Kernel modules: k8temp
01:0a.0 FireWire (IEEE 1394): Texas Instruments TSB82AA2 IEEE-1394b Link Layer Controller (rev 01)
        Kernel driver in use: ohci1394
        Kernel modules: firewire-ohci, ohci1394
05:00.0 VGA compatible controller: nVidia Corporation G72 [GeForce 7300 SE/7200 GS] (rev a1)
        Kernel driver in use: nouveau
        Kernel modules: nvidiafb, nouveau

---
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.21.
Architecture: i386
AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/dsp', '/dev/snd/by-path', '/dev/snd/controlC0', '/dev/snd/pcmC0D0c', '/dev/snd/pcmC0D0p', '/dev/snd/pcmC0D1c', '/dev/snd/pcmC0D2p', '/dev/snd/seq', '/dev/snd/timer', '/dev/sequencer2', '/dev/sequencer'] failed with exit code 1:
CRDA: Error: [Errno 2] No such file or directory
Card0.Amixer.info:
 Card hw:0 'CK804'/'NVidia CK804 with ALC850 at irq 22'
   Mixer name : 'Realtek ALC850 rev 0'
   Components : 'AC97a:414c4790'
   Controls : 42
   Simple ctrls : 27
DistroRelease: Ubuntu 10.04
HibernationDevice: RESUME=UUID=06e241b1-953b-48fd-a9c7-475c189cb8eb
InstallationMedia: Mythbuntu 10.04 LTS "Lucid Lynx" - Release i386 (20100427.1)
IwConfig:
 lo no wireless extensions.

 eth0 no wireless extensions.
Lsusb:
 Bus 002 Device 003: ID 0bc7:0004 X10 Wireless Technology, Inc. X10 Receiver
 Bus 002 Device 002: ID 046d:c218 Logitech, Inc. Logitech RumblePad 2 USB
 Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
 Bus 001 Device 002: ID 152d:2338 JMicron Technology Corp. / JMicron USA Technology Corp. JM20337 Hi-Speed USB to SATA & PATA Combo Bridge
 Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Package: linux (not installed)
ProcCmdLine: root=/dev/nfs initrd=Ubuntu-Lucid-Lynx-i386/initrd.img-2.6.32-25-generic nfsroot=10.11.12.2:/home/nohdboot/Ubuntu-Lucid-Lynx-i386 ip=dhcp rw BOOT_IMAGE=Ubuntu-Lucid-Lynx-i386/vmlinuz-2.6.32-25-generic auto
ProcEnviron:
 LANG=en_US.UTF-8
 SHELL=/bin/bash
ProcVersionSignature: Ubuntu 2.6.32-25.44-generic 2.6.32.21+drm33.7
Regression: Yes
RelatedPackageVersions: linux-firmware 1.34.1
Reproducible: Yes
RfKill:

Tags: lucid regression-update needs-upstream-testing
Uname: Linux 2.6.32-25-generic i686
UserGroups: adm admin cdrom dialout lpadmin mythtv plugdev sambashare video
dmi.bios.date: 01/13/2006
dmi.bios.vendor: Award Software International, Inc.
dmi.bios.version: F2
dmi.board.name: NF-CK804
dmi.board.vendor: Gigabyte Technology Co., Ltd.
dmi.board.version: x.x
dmi.chassis.type: 3
dmi.modalias: dmi:bvnAwardSoftwareInternational,Inc.:bvrF2:bd01/13/2006:svn:pn:pvr:rvnGigabyteTechnologyCo.,Ltd.:rnNF-CK804:rvrx.x:cvn:ct3:cvr:

[Book 'em Dano (heymrdjd)]

Thank you for taking the time to report this bug and helping to make Ubuntu better. Unfortunately, we can't fix it without more information.

Please run the following command which will attach necessary information:

apport-collect 657418
if you are using Karmic Koala (9.10) or newer, or

apport-collect -p linux-image-`uname -r` BUGNUMBER
if you are using Jaunty Jackalope (9.04).

Bear in mind that you may need to install the python-launchpadlib package from the universe repository with 'sudo apt-get install python-launchpadlib'. Additionally, when prompted to give apport-collect permissions for Launchpad you will need to give it at least the ability to "Change Non-Private" data as it will be adding information to your bug report.

If you are using an older release or cannot use apport please at least add the following information (pay attention to lspci's additional options):

First run the following commands:
1) uname -a > uname-a.log
2) dmesg > dmesg.log
3) sudo lspci -vvnn > lspci-vvnn.log
4) cat /proc/version_signature > version.log
then attach the files separately to the bug report (not pasted into comments or tar/zip-ed).

For your reference, the full description of procedures for kernel related bug reports is available at https://wiki.ubuntu.com/KernelTeam/KernelTeamBugPolicies. Thanks in advance!

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I am writing detailed description of the steps to reproduce the bug.