Dual booting Ubuntu 18.04 and Slackware 14.2.

Hi: I have to use lilo to be able to boot both Ubuntu and Slackware. This is the Ubuntu /boot directory:Code:root@darkstar:~# ls -l /ubuntu/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 2019 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 2019 config-4.15.0-48-generic
drwxr-xr-x 3 root root 4096 May 3 2019 efi/
drwxr-xr-x 2 root root 4096 May 5 2019 grub/
-rw-r--r-- 1 root root 57530086 May 3 2019 initrd.img-4.15.0-20-generic
-rw-r--r-- 1 root root 57720646 Apr 4 2020 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 2019 vmlinuz-4.15.0-48-generic
root@darkstar:~#And this is the lilo.conf I am using (the Ubuntu partition is mounted on /mnt):Code:bill@darkstar:/debian/cine$ cat /backup_almacen/lilo.conf
# /etc/lilo.conf
#
# global options:
boot=/dev/sda
prompt
timeout=150
lba32
# compact
change-rules
reset
vga=normal

#
### bootable kernel images ###
image=/boot/vmlinuz
label=slackware_14_2
read-only
root=/dev/sda5
image=/mnt/boot/vmlinuz-4.15.0-48-generic
label=Ubuntu
read-only
root=/dev/sda7
# image=/tamu/vmlinuz
# label=tamu
# initrd=/tamu/initrd.img
# root=/dev/hdb2
# vga=ask
#

bill@darkstar:/debian/cine$With Slackware I have no problem. I can boot it. The trouble is Ubuntu. It gives kernel panic. Any suggestion?