kernel panic when booting Linux/GNU operating system.

stf92 · 05-05-2019, 12:20 PM

Hi:

Code:

root@darkstar:~# mount -t ext2 /dev/sda7 /mnt
root@darkstar:~# ls -l /mnt/boot
total 139280
-rw------- 1 root root  4038188 Apr 24  2018 System.map-4.15.0-20-generic
-rw------- 1 root root  4052134 Apr  2 13:31 System.map-4.15.0-48-generic
-rw-r--r-- 1 root root  1536934 Apr 24  2018 abi-4.15.0-20-generic
-rw-r--r-- 1 root root   216807 Apr 24  2018 config-4.15.0-20-generic
-rw-r--r-- 1 root root   217278 Apr  2 13:31 config-4.15.0-48-generic
drwxr-xr-x 3 root root     4096 May  3 23:40 efi/
drwxr-xr-x 2 root root     4096 May  3 23:40 grub/
-rw-r--r-- 1 root root 57530086 May  3 23:40 initrd.img-4.15.0-20-generic
-rw-r--r-- 1 root root 57717238 May  3 23:39 initrd.img-4.15.0-48-generic
-rw-r--r-- 1 root root   182704 Jan 28  2016 memtest86+.bin
-rw-r--r-- 1 root root   184380 Jan 28  2016 memtest86+.elf
-rw-r--r-- 1 root root   184840 Jan 28  2016 memtest86+_multiboot.bin
-rw-r--r-- 1 root root        0 Apr 24  2018 retpoline-4.15.0-20-generic
-rw-r--r-- 1 root root  8249080 Apr 26  2018 vmlinuz-4.15.0-20-generic
-rw------- 1 root root  8298232 Apr  3 05:07 vmlinuz-4.15.0-48-generic
root@darkstar:~#

In lilo.conf I have:

Code:

image = /mnt/boot/vmlinuz-4.15.0-48-generic
        root = /dev/sda7
        label = OS_2
        read-only

And I get

Code:

Please append a correct "root =" boot option: here are the available partitions:
Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(8,7).

linus72 · 05-05-2019, 12:31 PM

You need to add the initrd.img to the lilo config

Code:

image = /mnt/boot/vmlinuz-4.15.0-48-generic
initrd = /mnt/boot/initrd.img-4.15.0-48-generic
        root = /dev/sda7
        label = OS_2
        read-only

thenu run

Code:

lilo

shouldnt it be

Code:

image = /boot/vmlinuz-4.15.0-48-generic
initrd = /boot/initrd.img-4.15.0-48-generic
        root = /dev/sda7
        label = OS_2
        read-only

stf92 · 05-05-2019, 01:02 PM

I added it and booted successfully. But I have slackware running without an initrd!

Didier Spaier · 05-05-2019, 02:04 PM

Quote:

Originally Posted by stf92

I added it and booted successfully. But I have slackware running without an initrd!

Really you still do not know the difference between a huge and a generic kernel?

And during these years you didn't find the time to read this, found at the root of all Slackware ISO?

I am puzzled.

linus72 · 05-05-2019, 02:53 PM

sf92 tsk tsk
lol

stf92 · 05-05-2019, 06:26 PM

Quote:

Originally Posted by Didier Spaier

Really you still do not know the difference between a huge and a generic kernel?

And during these years you didn't find the time to read this, found at the root of all Slackware ISO?

I am puzzled.

I've read it a hundred times. So generic needs an initrd, it seems.

linus72 · 05-05-2019, 07:03 PM

yeah bro and the commands for making a initrd vary between 14.2 and current.
Use /usr/share/mkinitrd/mkinitrd_command_generator.sh as root for an example out, then copy/paste that into terminal and it'll make a initrd for you.
Here's example output for my drives and kernels, I have both 14.2 and current

Code:

** Slackware 14.2

bash-4.3# /usr/share/mkinitrd/mkinitrd_command_generator.sh
#
# mkinitrd_command_generator.sh revision 1.45
#
# This script will now make a recommendation about the command to use
# in case you require an initrd image to boot a kernel that does not
# have support for your storage or root filesystem built in
# (such as the Slackware 'generic' kernels').
# A suitable 'mkinitrd' command will be:

mkinitrd -c -k 4.4.172l -f ext4 -r /dev/sda3 -m usb-storage:ums-realtek:ehci-hcd:ehci-pci:uhci-hcd:jbd2:mbcache:ext4 -u -o /boot/initrd.gz

** Slackware -current

bash-5.0# /usr/share/mkinitrd/mkinitrd_command_generator.sh
#
# mkinitrd_command_generator.sh revision 1.45
#
# This script will now make a recommendation about the command to use
# in case you require an initrd image to boot a kernel that does not
# have support for your storage or root filesystem built in
# (such as the Slackware 'generic' kernels').
# A suitable 'mkinitrd' command will be:

mkinitrd -c -k 4.19.37-xanmod19 -f ext4 -r /dev/sda5 -m usb-storage:ums-realtek:libahci:ahci:uhci-hcd:ext4 -u -o /boot/initrd.gz

linus72 · 05-05-2019, 07:12 PM

But I digress to this post by allend (thanks) in -current
Did it change back to original command? Alien Bob?

https://www.linuxquestions.org/quest...nt-4175650457/

For slackware current

Code:

/usr/share/mkinitrd/mkinitrd_command_generator.sh -k 4.19.37-xanmod19:4.19.37-xanmod19

stf92 · 05-05-2019, 07:16 PM

In slackware I'm running huge for the moment. The machine is under test and has the minimum indispensable. For an initrd i follow Volkerdi's instructions which he gives in a certainfile.