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Date: Tue, 27 Dec 2011 13:11:49 -0500
From: Miles Lane <miles.lane@...il.com>
To: LKML <linux-kernel@...r.kernel.org>,
"Theodore Ts'o" <tytso@....edu>, Jan Kara <jack@...e.cz>,
Andrew Morton <akpm@...ux-foundation.org>,
Andreas Dilger <adilger.kernel@...ger.ca>
Subject: Re: Offtopic? - I have a vmlinuz-3.2.0-rc7+ kernel file that will not
load -- ("invalid magic number") with the latest Ubuntu grub2 (1.99-14ubuntu2)
On Tue, Dec 27, 2011 at 12:05 AM, Miles Lane <miles.lane@...il.com> wrote:
> On Mon, Dec 26, 2011 at 5:11 PM, Miles Lane <miles.lane@...il.com> wrote:
>> Sorry to ask a potentially off-topic question, but I have received no
>> help from the GRUB2 mailing list.
>> The reply I got was:
>> "Well apparently the number you gave it wasn't magic ;) just a
>> joke. I really don't have a good answer , I wish I did. Sorry , I just
>> needed to clown for a bit."
>> http://comments.gmane.org/gmane.comp.boot-loaders.grub.user/974
>>
>> If noone has time to help, no problemo. I suppose that when Canonical
>> releases the final 12.04 that the problem will go away with a fresh
>> install.
>>
>> I have a 3.2.0-6 kernel that Canonical built which successfully boots.
>> I have tried building a Linus GIT tree kernel using the .config that
>> Canonical used, but it still fails to boot.
>> My best guess is that perhaps there is either a problem with my Grub2
>> (1.99-14ubuntu2) installation, or that something is amiss with my
>> toolchain.
>>
>> I am running a WUBI install (the root filesystem is located in a
>> loopback mounted file on my Windows 7 NTFS filesystem). The
>> distribution is Ubuntu 11.10 upgraded to 12.04 (Precise Pangolin).
>>
>>
>> fdisk:
>> Disk /dev/sda: 500.1 GB, 500107862016 bytes
>> 255 heads, 63 sectors/track, 60801 cylinders, total 976773168 sectors
>> Units = sectors of 1 * 512 = 512 bytes
>> Sector size (logical/physical): 512 bytes / 512 bytes
>> I/O size (minimum/optimal): 512 bytes / 512 bytes
>> Disk identifier: 0x8ea8e911
>>
>> Device Boot Start End Blocks Id System
>> /dev/sda1 * 2048 206847 102400 7 HPFS/NTFS/exFAT
>> /dev/sda2 206848 976771071 488282112 7 HPFS/NTFS/exFAT
>>
>> mount:
>> /dev/loop0 on / type ext3 (rw,commit=0,commit=0)
>> proc on /proc type proc (rw,noexec,nosuid,nodev)
>> sysfs on /sys type sysfs (rw,noexec,nosuid,nodev)
>> none on /sys/fs/fuse/connections type fusectl (rw)
>> none on /sys/kernel/debug type debugfs (rw)
>> none on /sys/kernel/security type securityfs (rw)
>> udev on /dev type devtmpfs (rw,mode=0755)
>> devpts on /dev/pts type devpts (rw,noexec,nosuid,gid=5,mode=0620)
>> tmpfs on /run type tmpfs (rw,noexec,nosuid,size=10%,mode=0755)
>> none on /run/lock type tmpfs (rw,noexec,nosuid,nodev,size=5242880)
>> none on /run/shm type tmpfs (rw,nosuid,nodev)
>> /dev/sda2 on /host type fuseblk
>> (rw,nosuid,nodev,relatime,user_id=0,group_id=0,allow_other,blksize=4096)
>> binfmt_misc on /proc/sys/fs/binfmt_misc type binfmt_misc
>> (rw,noexec,nosuid,nodev)
>> gvfs-fuse-daemon on /home/miles/.gvfs type fuse.gvfs-fuse-daemon
>> (rw,nosuid,nodev,user=miles)
>>
>> Gnu C 4.6
>> Gnu make 3.81
>> binutils 2.22
>> util-linux 2.20.1
>> mount support
>> module-init-tools 3.16
>> e2fsprogs 1.42-WIP
>> pcmciautils 018
>> PPP 2.4.5
>> Linux C Library 2.13
>> Dynamic linker (ldd) 2.13
>> Procps 3.2.8
>> Net-tools 1.60
>> Kbd 1.15.2
>> Sh-utils 8.13
>> wireless-tools 30
>>
>> Modules Loaded: parport_pc ppdev lp parport hid_logitech_dj joydev
>> bnep rfcomm bluetooth snd_hda_codec_hdmi snd_hda_codec_realtek
>> binfmt_misc usbhid hid uvcvideo videodev v4l2_compat_ioctl32
>> snd_usb_audio snd_usbmidi_lib snd_hda_intel snd_hda_codec snd_hwdep
>> snd_pcm snd_seq_midi snd_rawmidi snd_seq_midi_event snd_seq snd_timer
>> snd_seq_device i915 drm_kms_helper drm i2c_algo_bit video mei psmouse
>> snd serio_raw soundcore snd_page_alloc shpchp e1000e
>>
>> My system board is an INTEL DH67BL, BIOS
>> BLH6710H.86A.0110.2011.0415.1506 04/15/2011
>
> I set debug=all at the Grub2 command line and tried to load my custom kernel.
> The point where the failure occurs is when Grub checks to see whether
> the root filesystem is ext2:
>
> kern/disk.c:245: Opening 'loop0'.
> kern/fs.c:54: Detecting tarfs...
> failed
> kern/fs.c:54: Detecting iso9660...
> failed
> kern/fs.c:54: Detecting ext2...
> failed
>
> Then I tried to load the Ubuntu vmlinuz-3.2.0-6-generic
> And it gave:
>
> kern/fs.c:54: Detecting ext2...
> loader/i386/linux.c:201 real_size = 1800, prot_size = 4b1000, mmap_size = 2000
>
> So, I am confused whether this problem is:
> 1. A failure of Grub2 resulting from some flaw that causes any
> custom kernel installation to fail to boot because this detection
> fails in Grub2.
> 2. A failure of Grub2 to successfully detect the loop mounted
> filesystem at ext2 because there is a problem with a driver in Linus'
> GIT tree.
>
> Any thoughts on what the problem is?
Boot Info Script 0.60 from 17 May 2011
============================= Boot Info Summary: ===============================
=> Windows is installed in the MBR of /dev/sda.
sda1: __________________________________________________________________________
File system: ntfs
Boot sector type: Windows Vista/7
Boot sector info: No errors found in the Boot Parameter Block.
Operating System:
Boot files: /bootmgr /Boot/BCD
sda2: __________________________________________________________________________
File system: ntfs
Boot sector type: Windows Vista/7
Boot sector info: No errors found in the Boot Parameter Block.
Operating System: Windows 7
Boot files: /Windows/System32/winload.exe /wubildr
/ubuntu/winboot/wubildr /wubildr.mbr
/ubuntu/winboot/wubildr.mbr /ubuntu/disks/root.disk
/ubuntu/disks/swap.disk
sda2/Wubi: _____________________________________________________________________
File system: ext3
Boot sector type: -
Boot sector info:
Operating System: Ubuntu precise (development
branch)
Boot files: /boot/grub/grub.cfg /etc/fstab
============================ Drive/Partition Info: =============================
Drive: sda _____________________________________________________________________
Disk /dev/sda: 500.1 GB, 500107862016 bytes
255 heads, 63 sectors/track, 60801 cylinders, total 976773168 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
Partition Boot Start Sector End Sector # of Sectors Id System
/dev/sda1 * 2,048 206,847 204,800 7 NTFS /
exFAT / HPFS
/dev/sda2 206,848 976,771,071 976,564,224 7 NTFS /
exFAT / HPFS
"blkid" output: ________________________________________________________________
Device UUID TYPE LABEL
/dev/loop0 e4635099-89df-4538-8a43-cefac4a53b3b ext3
/dev/sda1 FC700CEB700CAE88 ntfs
System Reserved
/dev/sda2 9A200E69200E4CA7 ntfs
================================ Mount points: =================================
Device Mount_Point Type Options
/dev/loop0 / ext3 (rw,commit=0,commit=0)
/dev/sda2 /host fuseblk
(rw,nosuid,nodev,relatime,user_id=0,group_id=0,allow_other,blksize=4096)
======================== sda2/Wubi/boot/grub/grub.cfg: =========================
--------------------------------------------------------------------------------
#
# DO NOT EDIT THIS FILE
#
# It is automatically generated by grub-mkconfig using templates
# from /etc/grub.d and settings from /etc/default/grub
#
### BEGIN /etc/grub.d/00_header ###
if [ -s $prefix/grubenv ]; then
set have_grubenv=true
load_env
fi
set default="0"
if [ "${prev_saved_entry}" ]; then
set saved_entry="${prev_saved_entry}"
save_env saved_entry
set prev_saved_entry=
save_env prev_saved_entry
set boot_once=true
fi
function savedefault {
if [ -z "${boot_once}" ]; then
saved_entry="${chosen}"
save_env saved_entry
fi
}
function recordfail {
set recordfail=1
if [ -n "${have_grubenv}" ]; then if [ -z "${boot_once}" ]; then
save_env recordfail; fi; fi
}
function load_video {
insmod vbe
insmod vga
insmod video_bochs
insmod video_cirrus
}
insmod part_msdos
insmod ntfs
set root='(hd0,msdos2)'
search --no-floppy --fs-uuid --set=root 9A200E69200E4CA7
loopback loop0 /ubuntu/disks/root.disk
set root=(loop0)
if loadfont /usr/share/grub/unicode.pf2 ; then
set gfxmode=1680x1050x32
load_video
insmod gfxterm
insmod part_msdos
insmod ntfs
set root='(hd0,msdos2)'
search --no-floppy --fs-uuid --set=root 9A200E69200E4CA7
loopback loop0 /ubuntu/disks/root.disk
set root=(loop0)
set locale_dir=($root)/boot/grub/locale
set lang=en_US
insmod gettext
fi
terminal_output gfxterm
if [ "${recordfail}" = 1 ]; then
set timeout=-1
else
set timeout=10
fi
### END /etc/grub.d/00_header ###
### BEGIN /etc/grub.d/05_debian_theme ###
set menu_color_normal=white/black
set menu_color_highlight=black/light-gray
if background_color 44,0,30; then
clear
fi
### END /etc/grub.d/05_debian_theme ###
### BEGIN /etc/grub.d/10_linux ###
### END /etc/grub.d/10_linux ###
### BEGIN /etc/grub.d/10_lupin ###
if [ ${recordfail} != 1 ]; then
if [ -e ${prefix}/gfxblacklist.txt ]; then
if hwmatch ${prefix}/gfxblacklist.txt 3; then
if [ ${match} = 0 ]; then
set linux_gfx_mode=keep
else
set linux_gfx_mode=text
fi
else
set linux_gfx_mode=text
fi
else
set linux_gfx_mode=keep
fi
else
set linux_gfx_mode=text
fi
export linux_gfx_mode
if [ "$linux_gfx_mode" != "text" ]; then load_video; fi
menuentry 'Ubuntu, with Linux 3.2.0-7-generic' --class ubuntu --class
gnu-linux --class gnu --class os {
set gfxpayload=$linux_gfx_mode
insmod part_msdos
insmod ntfs
set root='(hd0,msdos2)'
search --no-floppy --fs-uuid --set=root 9A200E69200E4CA7
loopback loop0 /ubuntu/disks/root.disk
set root=(loop0)
linux /boot/vmlinuz-3.2.0-7-generic root=UUID=9A200E69200E4CA7
loop=/ubuntu/disks/root.disk ro quiet splash vt.handoff=7
initrd /boot/initrd.img-3.2.0-7-generic
}
menuentry 'Ubuntu, with Linux 3.2.0-7-generic (recovery mode)' --class
ubuntu --class gnu-linux --class gnu --class os {
set gfxpayload=$linux_gfx_mode
insmod part_msdos
insmod ntfs
set root='(hd0,msdos2)'
search --no-floppy --fs-uuid --set=root 9A200E69200E4CA7
loopback loop0 /ubuntu/disks/root.disk
set root=(loop0)
echo 'Loading Linux 3.2.0-7-generic ...'
linux /boot/vmlinuz-3.2.0-7-generic root=UUID=9A200E69200E4CA7
loop=/ubuntu/disks/root.disk ro recovery nomodeset
echo 'Loading initial ramdisk ...'
initrd /boot/initrd.img-3.2.0-7-generic
}
submenu "Previous Linux versions" {
menuentry 'Ubuntu, with Linux 3.2.0-6-generic' --class ubuntu --class
gnu-linux --class gnu --class os {
set gfxpayload=$linux_gfx_mode
insmod part_msdos
insmod ntfs
set root='(hd0,msdos2)'
search --no-floppy --fs-uuid --set=root 9A200E69200E4CA7
loopback loop0 /ubuntu/disks/root.disk
set root=(loop0)
linux /boot/vmlinuz-3.2.0-6-generic root=UUID=9A200E69200E4CA7
loop=/ubuntu/disks/root.disk ro quiet splash vt.handoff=7
initrd /boot/initrd.img-3.2.0-6-generic
}
menuentry 'Ubuntu, with Linux 3.2.0-6-generic (recovery mode)' --class
ubuntu --class gnu-linux --class gnu --class os {
set gfxpayload=$linux_gfx_mode
insmod part_msdos
insmod ntfs
set root='(hd0,msdos2)'
search --no-floppy --fs-uuid --set=root 9A200E69200E4CA7
loopback loop0 /ubuntu/disks/root.disk
set root=(loop0)
echo 'Loading Linux 3.2.0-6-generic ...'
linux /boot/vmlinuz-3.2.0-6-generic root=UUID=9A200E69200E4CA7
loop=/ubuntu/disks/root.disk ro recovery nomodeset
echo 'Loading initial ramdisk ...'
initrd /boot/initrd.img-3.2.0-6-generic
}
menuentry 'Ubuntu, with Linux 3.2.0-rc7+' --class ubuntu --class
gnu-linux --class gnu --class os {
set gfxpayload=$linux_gfx_mode
insmod part_msdos
insmod ntfs
set root='(hd0,msdos2)'
search --no-floppy --fs-uuid --set=root 9A200E69200E4CA7
loopback loop0 /ubuntu/disks/root.disk
set root=(loop0)
linux /boot/vmlinuz-3.2.0-rc7+ root=UUID=9A200E69200E4CA7
loop=/ubuntu/disks/root.disk ro quiet splash vt.handoff=7
initrd /boot/initrd.img-3.2.0-rc7+
}
menuentry 'Ubuntu, with Linux 3.2.0-rc7+ (recovery mode)' --class
ubuntu --class gnu-linux --class gnu --class os {
set gfxpayload=$linux_gfx_mode
insmod part_msdos
insmod ntfs
set root='(hd0,msdos2)'
search --no-floppy --fs-uuid --set=root 9A200E69200E4CA7
loopback loop0 /ubuntu/disks/root.disk
set root=(loop0)
echo 'Loading Linux 3.2.0-rc7+ ...'
linux /boot/vmlinuz-3.2.0-rc7+ root=UUID=9A200E69200E4CA7
loop=/ubuntu/disks/root.disk ro recovery nomodeset
echo 'Loading initial ramdisk ...'
initrd /boot/initrd.img-3.2.0-rc7+
}
menuentry 'Ubuntu, with Linux 3.2.0-rc7+.old' --class ubuntu --class
gnu-linux --class gnu --class os {
set gfxpayload=$linux_gfx_mode
insmod part_msdos
insmod ntfs
set root='(hd0,msdos2)'
search --no-floppy --fs-uuid --set=root 9A200E69200E4CA7
loopback loop0 /ubuntu/disks/root.disk
set root=(loop0)
linux /boot/vmlinuz-3.2.0-rc7+.old root=UUID=9A200E69200E4CA7
loop=/ubuntu/disks/root.disk ro quiet splash vt.handoff=7
initrd /boot/initrd.img-3.2.0-rc7+
}
menuentry 'Ubuntu, with Linux 3.2.0-rc7+.old (recovery mode)' --class
ubuntu --class gnu-linux --class gnu --class os {
set gfxpayload=$linux_gfx_mode
insmod part_msdos
insmod ntfs
set root='(hd0,msdos2)'
search --no-floppy --fs-uuid --set=root 9A200E69200E4CA7
loopback loop0 /ubuntu/disks/root.disk
set root=(loop0)
echo 'Loading Linux 3.2.0-rc7+.old ...'
linux /boot/vmlinuz-3.2.0-rc7+.old root=UUID=9A200E69200E4CA7
loop=/ubuntu/disks/root.disk ro recovery nomodeset
echo 'Loading initial ramdisk ...'
initrd /boot/initrd.img-3.2.0-rc7+
}
}
### END /etc/grub.d/10_lupin ###
### BEGIN /etc/grub.d/20_linux_xen ###
### END /etc/grub.d/20_linux_xen ###
### BEGIN /etc/grub.d/20_memtest86+ ###
### END /etc/grub.d/20_memtest86+ ###
### BEGIN /etc/grub.d/30_os-prober ###
### END /etc/grub.d/30_os-prober ###
### BEGIN /etc/grub.d/40_custom ###
# This file provides an easy way to add custom menu entries. Simply type the
# menu entries you want to add after this comment. Be careful not to change
# the 'exec tail' line above.
### END /etc/grub.d/40_custom ###
### BEGIN /etc/grub.d/41_custom ###
if [ -f $prefix/custom.cfg ]; then
source $prefix/custom.cfg;
fi
### END /etc/grub.d/41_custom ###
--------------------------------------------------------------------------------
============================= sda2/Wubi/etc/fstab: =============================
--------------------------------------------------------------------------------
# UNCONFIGURED FSTAB FOR BASE SYSTEM
/host/ubuntu/disks/swap.disk none swap sw 0 0
--------------------------------------------------------------------------------
================= sda2/Wubi: Location of files loaded by Grub: =================
GiB - GB File Fragment(s)
1.301773071 = 1.397768192 boot/grub/grub.cfg 2
13.741065025 = 14.754356224 boot/initrd.img-3.2.0-6-generic 62
13.749551773 = 14.763468800 boot/initrd.img-3.2.0-7-generic 63
1.417470932 = 1.521997824 boot/initrd.img-3.2.0-rc7+ 22
2.067645073 = 2.220116992 boot/vmlinuz-3.2.0-6-generic 94
13.718629837 = 14.730266624 boot/vmlinuz-3.2.0-7-generic 24
1.418664932 = 1.523279872 boot/vmlinuz-3.2.0-rc7+ 30
1.388851166 = 1.491267584 boot/vmlinuz-3.2.0-rc7+.old 31
13.749551773 = 14.763468800 initrd.img 63
13.741065025 = 14.754356224 initrd.img.old 62
13.718629837 = 14.730266624 vmlinuz 24
2.067645073 = 2.220116992 vmlinuz.old 94
--
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