6.7 - all done - reboot

cybermann · 02-09-2011, 09:30 AM

Hello

I finished the 6.7 LFS book, everything worked fine ... till the reboot.
I got a kernel panic, here a "screenshot"

http://img43.imageshack.us/img43/8572/img0018vw.jpg
http://img43.imageshack.us/img43/8572/img0018vw.th.jpg

A lot of topics say this has to do with missing drivers.

I compiled the kernel with make defconfig, because the pc is an quite old one with normal hardware like IDE harddrive, 900MhZ Pentium CPU and I dont think I need any special drivers witch are not enabled by default?

Do you need more info? What should I do now? Thank you!

druuna · 02-10-2011, 04:45 AM

Hi,

Quote:

Root-NFS: No NFS server available, giving up

The above doesn't look correct. NFS is used for disk-less machines that mount the root filesystem via NFS.

A few questions:
- Which filesystem did you create for the LFS partition (ext2/ext3/ext4/etc)?
- Which partition did you use for creating LFS?
- What does your /etc/fstab look like?
- What does your /boot/grub/grub.cfg LFS menuentry look like?
- Are the correct option(s) present in your kernel config?

Hope this helps.

cybermann · 02-10-2011, 07:02 AM

Quote:

- Which filesystem did you create for the LFS partition (ext2/ext3/ext4/etc)?

As it is written in the book, I created a ext3 partition

Quote:

- Which partition did you use for creating LFS?

I use the LFS Live CD

Quote:

- What does your /etc/fstab look like?

Code:

root:/sources/linux-2.6.35.4# cat /etc/fstab 
# Begin /etc/fstab

# file system  mount-point  type   options         dump  fsck
#                                                        order

/dev/hda1      /            ext3   defaults        1     1
/dev/hda2      swap         swap   pri=1           0     0
proc           /proc        proc   defaults        0     0
sysfs          /sys         sysfs  defaults        0     0
devpts         /dev/pts     devpts gid=4,mode=620  0     0
tmpfs          /dev/shm     tmpfs  defaults        0     0
# End /etc/fstab

Quote:

- What does your /boot/grub/grub.cfg LFS menuentry look like?

Code:

root:/sources/linux-2.6.35.4# cat /boot/grub/grub.cfg 
#
# DO NOT EDIT THIS FILE
#
# It is automatically generated by /usr/sbin/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
  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
}
insmod ext2
set root='(hd0,1)'
search --no-floppy --fs-uuid --set 6565ea77-31c4-4b94-9483-c91359dd4104
set locale_dir=($root)/boot/grub/locale
set lang=en
insmod gettext
set timeout=5
### END /etc/grub.d/00_header ###

### BEGIN /etc/grub.d/10_linux ###
menuentry "GNU/Linux, with Linux 2.6.35.4-lfs-6.7" --class gnu-linux --class gnu --class os {
        insmod ext2
        set root='(hd0,1)'
        search --no-floppy --fs-uuid --set 6565ea77-31c4-4b94-9483-c91359dd4104
        echo    Loading Linux 2.6.35.4-lfs-6.7 ...
        linux   /boot/vmlinux-2.6.35.4-lfs-6.7 root=/dev/hda1 ro  
}
menuentry "GNU/Linux, with Linux 2.6.35.4-lfs-6.7 (recovery mode)" --class gnu-linux --class gnu --class os {
        insmod ext2
        set root='(hd0,1)'
        search --no-floppy --fs-uuid --set 6565ea77-31c4-4b94-9483-c91359dd4104
        echo    Loading Linux 2.6.35.4-lfs-6.7 ...
        linux   /boot/vmlinux-2.6.35.4-lfs-6.7 root=/dev/hda1 ro single 
}
### END /etc/grub.d/10_linux ###

### 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 ###
root:/sources/linux-2.6.35.4#

Quote:

- Are the correct option(s) present in your kernel config?

What options? Configuring the kernel isnt well described in the LFS book, so first I tried creating it with "make defconfig". But as it didnt work, I tried make menuconfig, looked through the menus (selected EXT2 and EXT3 in "filesystems") and compiled it. Same error on reboot...

Thank you for your help!

druuna · 02-10-2011, 08:09 AM

Hi,

The above looks correct/consistent, although I do wonder why hda is used and not sda. Which leaves the kernel and its configuration.

It is kinda hard to describe what needs to be turned on or off when running the make menuconfig part: There are just too many possible combinations.

Make sure these are set (assuming you have started make menuconfig):

1) File systems -> Ext3 journalling file system support,
2) Check the entries and activate the options that say If unsure, say Y. (can be found in the help tab),
3) Serial ATA (prod) and Parallel ATA -> select the appropriate option for your hardware.

Configuring the kernel can be a bit of a puzzle and you do have to know what hardware is present.

You could also try setting all the entries to "Y" in one go: Run make allyesconfig. You will end up with a big kernel that has entries enabled that you probably don't need, but you can turn those off later on if you want/need to.

Hope this helps.