[lfs-support] Can't boot into LFS kernel.

Fernando de Oliveira famobr at yahoo.com.br
Mon Sep 10 07:00:13 PDT 2012


Em 10-09-2012 10:26, Henrik /KaarPoSoft escreveu:> You may try root=/dev/sda1
> Sometimes device naming is not consistent between distros.
> 
> On 09/10/12 14:01, Khoa Nguyen wrote:
>> Hi all,
>>
>> I've just finished LFS. However, I'm facing with the problem that I 
>> can't boot into the LFS kernel.
>>
>> It displays :
>>
>> VFS: Cannot open root device "sdb1" or unkonwn-block(2,0)
>> Please append a correct "root=" boot option;
>>
>> ....
>>
>> Kernel panic -  not syncing : VFS: Unable to mount root fs on 
>> unknown-block (2-0).
>>
>> ...
>> title LFS7.1 (Linux 3.2.6-lfs-7.1)
>>     root (hd1,0)
>>     insmod ext3
>>     kernel /boot/vmlinuz-3.2.6-lfs-7.1 root=/dev/sdb1 ro


I have:

$ cat /etc/release 
SVN-20120311 (7.1)

$ grub-install --version
grub-install (GRUB) 1.99

# blkid | grep LFS
/dev/sda1: LABEL="LFS71" UUID="54f684bc-5a56-4a05-8a93-37dd108c617e" TYPE="ext4" 

One section og grub.cfg:

menuentry 'GNU/Linux, with Linux 3.5.3-lfs' --class gnu-linux --class gnu --class os {
    load_video
    insmod gzio
    insmod part_msdos
    insmod ext2
    set root='(hd0,msdos1)'
    search --no-floppy --fs-uuid --set=root 54f684bc-5a56-4a05-8a93-37dd108c617e
    echo    'Loading Linux 3.5.3-lfs ...'
    linux   /boot/vmlinuz-3.5.3-lfs root=/dev/sda1 ro  
}

In another machine:

$ cat /etc/release 
SVN-20120311 (7.1)

$ grub-install --version
grub-install (GRUB) 1.99

# blkid | grep -i LFS
/dev/sda3: LABEL="LFS" UUID="0a76e206-bd43-4ebf-b54a-75c9c1cf4267" TYPE="ext4" 


menuentry "GNU/Linux, with Linux 3.5.3-NG-pae (on /dev/sda3)" --class gnu-linux --class gnu --class os {
    insmod part_msdos
    insmod ext2
    set root='(hd0,msdos3)'
    search --no-floppy --fs-uuid --set=root 0a76e206-bd43-4ebf-b54a-75c9c1cf4267
    linux /boot/vmlinuz-3.5.3-NG-pae root=/dev/sda3 ro
}

Although the search not being useful, according to the editors, here, I
did not bother to delete the respective lines.

What is grub version?

-- 
[]s,
Fernando



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