Slackware 14.2 fresh install doesn't run LILO nor ELILO at boot

This is my third Slackware 14.2 64-bit installation.  I'm installing it now on a laptop with GPT partitions. I will describe as best as possible the path I had to do with this installation. Initially I had to overcome the issue that using dd to create the USB stick for installation was not booting from the pendrive.  I had to use the usbimg2disk.sh script. Once I was able to boot from the USB I had to mount the pendrive manually as the USB was not detected when I was asked for source media. i.e., I did: mkdir /os mount /dev/sda1 /os And then I selected "install from premounted directory" and used /os/cdrom0/slackware64 All the installation went fine, but then I faced another issue, which I couldn't resolve yet. I tried with lilo and elilo options, but the boot is still showing the grub2, which was there from the Ubuntu 14.04 installed previously, with no options but the grub command line instead. I may mention that from BIOS setup I see as UEFI Hard Drive BBS Priorities Boot Option #1 which is [ubuntu], but not sure that should be an issue, as I have overridden the Ubuntu partition already.  However, I'm not sure why the ubuntu tag is there and I don't see any way to change that. The partitions I selected within the installation were: /dev/mmcblk0p3 / ext4 /dev/mmcblk0p4 /home ext4 As I had only GRUB available, I decided to learn some GRUB commands and was able to start the Slackware kernel with the below commands: grub> set root=(hd0,gpt3) grub> linux /boot/vmlinuz root=/dev/mmcblk0p3 grub> initrd /boot/vmlinuz grub> boot I thought it was going to be a successful start, but instead I got the following kernel panic error:

RAMDISK: Couln't find valid RAM disk image starting at 0. 
VFS: Cannot open root device "mmcblk0p3" or unknown-block(0,0): error

Here are two photographs of the screen during the boot:  and .  Neither is perfectly clear; look at either one, or both, or neither, as you prefer. How can I start Slackware 14.2 with GRUB commands?  I may be missing something as I am new to GRUB commands. The best solution I would be looking for is that lilo or elilo show at startup in order to start Slackware automatically.  What can I do for lilo to show as boot loader?