[SOLVED] LFS Version 9.1, 8.4.3. Setting Up the GRUB Configuration

colorpurple21859 · 07-10-2020, 09:38 AM

Quote:

UUID=/dev/sdb3

this will need to be a number similar to the one in the line above it.
you will at least need these usb drivers compiled into the kernel xhci ehci uhc-hcd usb-storage There maybe more try with adding these first.

spiky0011 · 07-10-2020, 09:39 AM

Quote:

Change your grub linux line to this
linux /boot/vmlinuz-5.5.3-lfs-9.1 root=UUID=42e174ea-46f1-4300-b5c5-870e7f9152f4

UUID wont work on kernel line unless there is a initramfs, use /dev/sdXX

colorpurple21859 · 07-10-2020, 09:53 AM

Quote:

UUID wont work on kernel line unless there is a initramfs, use /dev/sdXX

forgot about that. use

Code:

root=/dev/sdb2

Other drivers you may need uas uhci_hcd ehci_pci echi_hcd

colorpurple21859 · 07-10-2020, 10:12 AM

run blkid to find the partuuid of your lfs partition change the root=UUID=<uuid number> to root=PARTUUID=<lfs partition partuuid number>

Shah404 · 07-10-2020, 10:36 AM

Hello Sir,
Thank you for helping me.

I changed the fstab file to

Quote:

(lfs chroot) root:/# cat /etc/fstab
# Begin /etc/fstab

UUID=42e174ea-46f1-4300-b5c5-870e7f9152f4 / ext4 defaults 1 1
UUID=42e174ea-46f1-4300-b5c5-870e7f9152f4 swap swap pri=1 0 0

proc /proc proc nosuid,noexec,nodev 0 0
sysfs /sys sysfs nosuid,noexec,nodev 0 0
devpts /dev/pts devpts gid=5,mode=620 0 0
tmpfs /run tmpfs defaults 0 0
devtmpfs /dev devtmpfs mode=0755,nosuid 0 0

# End /etc/fstab

blkid on my host shows

Quote:

shahrukh@shahrukh-HP-15-Notebook-PC:~$ blkid
/dev/sdb3: UUID="617d3a82-8c40-4295-a41e-288251c1dfea" TYPE="swap" PARTUUID="e0917b86-b923-694f-aa15-b508116eb460"
/dev/sda4: UUID="717167f2-63b5-4d1e-ad97-594bcc22c844" TYPE="ext4" PARTUUID="4837e416-114d-4ceb-9d88-6d1f99886096"

as my usb is sdb, sdb3 is for swap.
so i changed my grub file to

Quote:

menuentry 'unknown Linux distribution (on /dev/sdb2)' --class linux --class gnu-linux --class gnu --class os $menuentry_id_option 'osprober-gnulinux->
insmod part_gpt
insmod ext2
set root='hd1,gpt2'
if [ x$feature_platform_search_hint = xy ]; then
search --no-floppy --fs-uuid --set=root --hint-bios=hd2,gpt2 --hint-efi=hd1,gpt2 --hint-baremetal=ahci2,gpt2 42e174ea-46f1-4300-b5c5-870e7>
else
search --no-floppy --fs-uuid --set=root 42e174ea-46f1-4300-b5c5-870e7f9152f4
fi
linux /boot/vmlinuz-5.5.3-lfs-9.1 root=PARTUUID=e0917b86-b923-694f-aa15-b508116eb460
}
submenu 'Advanced options for unknown Linux distribution (on /dev/sdb2)' $menuentry_id_option 'osprober-gnulinux-advanced-42e174ea-46f1-4300-b5c5-870>
menuentry 'unknown Linux distribution (on /dev/sdb2)' --class gnu-linux --class gnu --class os $menuentry_id_option 'osprober-gnulinux-/boot/>
insmod part_gpt
insmod ext2
set root='hd1,gpt2'
if [ x$feature_platform_search_hint = xy ]; then
search --no-floppy --fs-uuid --set=root --hint-bios=hd2,gpt2 --hint-efi=hd1,gpt2 --hint-baremetal=ahci2,gpt2 42e174ea-46f1-4300-b5>
else
search --no-floppy --fs-uuid --set=root 42e174ea-46f1-4300-b5c5-870e7f9152f4
fi
linux /boot/vmlinuz-5.5.3-lfs-9.1 root=PARTUUID=e0917b86-b923-694f-aa15-b508116eb460
}
}

now i have to compile usb drivers, right?

colorpurple21859 · 07-10-2020, 10:48 AM

your fstab should look like this

Code:

# Begin /etc/fstab

UUID=42e174ea-46f1-4300-b5c5-870e7f9152f4 / ext4 defaults 1 1
UUID=617d3a82-8c40-4295-a41e-288251c1dfea swap swap pri=1 0 0

proc /proc proc nosuid,noexec,nodev 0 0
sysfs /sys sysfs nosuid,noexec,nodev 0 0
devpts /dev/pts devpts gid=5,mode=620 0 0
tmpfs /run tmpfs defaults 0 0
devtmpfs /dev devtmpfs mode=0755,nosuid 0 0

# End /etc/fstab

This is wrong

Code:

linux /boot/vmlinuz-5.5.3-lfs-9.1 root=PARTUUID=e0917b86-b923-694f-aa15-b508116eb460

You have the partuuid of the swap partition /dev/sdb3. It needs to be the partuuid of /dev/sdb2

Shah404 · 07-10-2020, 11:09 AM

Thank You Sir,

PARTUUID is

Quote:

shahrukh@shahrukh-HP-15-Notebook-PC:~$ sudo blkid /dev/sdb2
/dev/sdb2: UUID="42e174ea-46f1-4300-b5c5-870e7f9152f4" TYPE="ext4" PARTUUID="2fed1596-29b9-c04d-aca2-1cc55b8e7e69"

now my grub.cfg looks like

Quote:

menuentry 'unknown Linux distribution (on /dev/sdb2)' --class linux --class gnu-linux --class gnu --class os $menuentry_id_option 'osprober-gnulinux-simple-42e174ea-46f1-4300-b5c5-870e7f9152f4' {
insmod part_gpt
insmod ext2
set root='hd1,gpt2'
if [ x$feature_platform_search_hint = xy ]; then
search --no-floppy --fs-uuid --set=root --hint-bios=hd2,gpt2 --hint-efi=hd1,gpt2 --hint-baremetal=ahci2,gpt2 42e174ea-46f1-4300-b5c5-870e7f9152f4
else
search --no-floppy --fs-uuid --set=root 42e174ea-46f1-4300-b5c5-870e7f9152f4
fi
linux /boot/vmlinuz-5.5.3-lfs-9.1 root=PARTUUID=2fed1596-29b9-c04d-aca2-1cc55b8e7e69
}
submenu 'Advanced options for unknown Linux distribution (on /dev/sdb2)' $menuentry_id_option 'osprober-gnulinux-advanced-42e174ea-46f1-4300-b5c5-870e7f9152f4' {
menuentry 'unknown Linux distribution (on /dev/sdb2)' --class gnu-linux --class gnu --class os $menuentry_id_option 'osprober-gnulinux-/boot/vmlinuz-5.5.3-lfs-9.1--42e174ea-46f1-4300-b5c5-870e7f9152f4' {
insmod part_gpt
insmod ext2
set root='hd1,gpt2'
if [ x$feature_platform_search_hint = xy ]; then
search --no-floppy --fs-uuid --set=root --hint-bios=hd2,gpt2 --hint-efi=hd1,gpt2 --hint-baremetal=ahci2,gpt2 42e174ea-46f1-4300-b5c5-870e7f9152f4
else
search --no-floppy --fs-uuid --set=root 42e174ea-46f1-4300-b5c5-870e7f9152f4
fi
linux /boot/vmlinuz-5.5.3-lfs-9.1 root=PARTUUID=2fed1596-29b9-c04d-aca2-1cc55b8e7e69
}
}

Now i understood a bit.
Great

Is it okay now?
now the only thing left are usb drviers

spiky0011 · 07-10-2020, 01:04 PM

My grub.cfg would look much more simplier

set default=0
set timeout=5

insmod ext2
set root=(hd1,2)

menuentry "GNU/Linux, Linux 5.5.3-lfs-9.1" {
linux /boot/vmlinuz-5.5.3-lfs-9.1 root=/dev/sdb2 rootdelay=10 ro
}

The reason for "rootdelay" is to allow usb to be recognised

That would be all you need

colorpurple21859 · 07-10-2020, 01:17 PM

I think ops lfs grub entry is a modified entry generated by the host update-grub. Changed to root=PARTUUID because of the usb changing from sdc to sdb. I had forgot about the rootdelay=10 and needs to be added to the linux line.

Shah404 · 07-10-2020, 01:46 PM

Hello
i added the rootdelay in grub.cfg

Quote:

menuentry 'unknown Linux distribution (on /dev/sdb2)' --class linux --class gnu-linux --class gnu --class os $menuentry_id_option 'osprober-gnulinux-simple-42e174ea-46f1-4300-b5c5-870e7f9152f4' {
insmod part_gpt
insmod ext2
set root='hd1,gpt2'
if [ x$feature_platform_search_hint = xy ]; then
search --no-floppy --fs-uuid --set=root --hint-bios=hd2,gpt2 --hint-efi=hd1,gpt2 --hint-baremetal=ahci2,gpt2 42e174ea-46f1-4300-b5c5-870e7f9152f4
else
search --no-floppy --fs-uuid --set=root 42e174ea-46f1-4300-b5c5-870e7f9152f4
fi
linux /boot/vmlinuz-5.5.3-lfs-9.1 root=PARTUUID=2fed1596-29b9-c04d-aca2-1cc55b8e7e69 rootdelay=10 ro
}
submenu 'Advanced options for unknown Linux distribution (on /dev/sdb2)' $menuentry_id_option 'osprober-gnulinux-advanced-42e174ea-46f1-4300-b5c5-870e7f9152f4' {
menuentry 'unknown Linux distribution (on /dev/sdb2)' --class gnu-linux --class gnu --class os $menuentry_id_option 'osprober-gnulinux-/boot/vmlinuz-5.5.3-lfs-9.1--42e174ea-46f1-4300-b5c5-870e7f9152f4' {
insmod part_gpt
insmod ext2
set root='hd1,gpt2'
if [ x$feature_platform_search_hint = xy ]; then
search --no-floppy --fs-uuid --set=root --hint-bios=hd2,gpt2 --hint-efi=hd1,gpt2 --hint-baremetal=ahci2,gpt2 42e174ea-46f1-4300-b5c5-870e7f9152f4
else
search --no-floppy --fs-uuid --set=root 42e174ea-46f1-4300-b5c5-870e7f9152f4
fi
linux /boot/vmlinuz-5.5.3-lfs-9.1 root=PARTUUID=2fed1596-29b9-c04d-aca2-1cc55b8e7e69 rootdelay=10 ro
}
}

this is etc/fstab of lfs

Quote:

(lfs chroot) root:/# cat /etc/fstab
# Begin /etc/fstab

UUID=42e174ea-46f1-4300-b5c5-870e7f9152f4 / ext4 defaults 1 1
UUID=617d3a82-8c40-4295-a41e-288251c1dfea swap swap pri=1 0 0

proc /proc proc nosuid,noexec,nodev 0 0
sysfs /sys sysfs nosuid,noexec,nodev 0 0
devpts /dev/pts devpts gid=5,mode=620 0 0
tmpfs /run tmpfs defaults 0 0
devtmpfs /dev devtmpfs mode=0755,nosuid 0 0

# End /etc/fstab

It was great USB was recognised, so i dont need drivers to be compiled in kernel now?

Now there are different errors.

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if its not visible, its showing

Quote:

failed to create symbolic link '/dev/shm'

Quote:

...swapon: cannot find the device for <<UUID>>

Quote:

Mounting root file system in read-only mode... mount: /: can't find <<UUID>>

I checked the UUID of sdb2 and sdb3, they are same as in /etc/fstab

spiky0011 · 07-10-2020, 01:55 PM

Blank out swap line in fstab ( not required to boot)
#UUID=617d3a82-8c40-4295-a41e-288251c1dfea swap swap pri=1 0 0.

If possible remove device sdc
make kernel line root=/dev/sdb2

will simplify matters

Shah404 · 07-10-2020, 02:01 PM

Sir,
You mean change

Quote:

linux /boot/vmlinuz-5.5.3-lfs-9.1 root=PARTUUID=2fed1596-29b9-c04d-aca2-1cc55b8e7e69 rootdelay=10 ro

to

Quote:

linux /boot/vmlinuz-5.5.3-lfs-9.1 root=/dev/sdb2 rootdelay=10 ro

?

And also there is no sdc device
How should i remove it?

This is from lsblk

Quote:

sda 8:0 0 465.8G 0 disk
├─sda1 8:1 0 196.3G 0 part
├─sda2 8:2 0 170.5G 0 part
├─sda3 8:3 0 9.3G 0 part /boot/efi
├─sda4 8:4 0 28G 0 part /
└─sda6 8:6 0 61.2G 0 part
sdb 8:16 1 28.7G 0 disk
├─sdb1 8:17 1 100M 0 part /mnt/lfs/boot
├─sdb2 8:18 1 12G 0 part /mnt/lfs
└─sdb3 8:19 1 4G 0 part [SWAP]
sr0 11:0 1 1024M 0 rom

spiky0011 · 07-10-2020, 02:08 PM

Hang on sdb1 is that where the kernel is???? "├─sdb1 8:17 1 100M 0 part /mnt/lfs/boot"
and comment out swap in fstab

Shah404 · 07-10-2020, 02:19 PM

i used these commands while mounting my usb
sudo mount -v -t /dev/sdb2 $LFS
sudo mount -v -t /dev/sdb1 $LFS/boot
sudo /sbin/swapon -v /dev/sdb3

so main system is on sdb2, right?

also i commented out swap line .

and rebooted. now the swap error was gone.

but this error was still there

Quote:

Mounting root file system in read-only mode... mount: /: can't find <<UUID>>

kernel should be here right?

Quote:

(lfs chroot) root:/boot# ls
grub lost+found

spiky0011 · 07-10-2020, 02:27 PM

ok your looking for the kernel in the wrong place, It's in /dev/sdb1
so you grub.cfg is wrong

set root=(hd1,1)

linux /vmlinuz-5.5.3-lfs-9.1 root=/dev/sdb2 rootdelay=10 ro

the reason "boot" is removed from kernel line is because it is only /dev/sdb1 and not /dev/sdb2/boot

just to confirm mount /dev/sdb2 /mnt ls /mnt/boot
and if you want you can check sdb1 the same way "umount /dev/sdb2" 1st