Thanks bru65pag for clarifying $LFS.
Thanks for your feedback. I?m not sure I understand properly. Is the ISO which failed or the installation is not booting after reboot?
The original problem that I posted about was visible in the link to the photo of a kernel panic.
To test further I downloaded the LXQT variant, and attempted to dd that onto three different USB sticks.
Used dd as per recommendation.
I went to boot them on another machine they didn't boot.
There was no Splash screen to select the type of boot options, as when I tried the CDE variant. The USB drive/stick/key was not recognized by the BIOS on the other machine at all.
I placed the USB drives back in my Linux Mint machine, and they weren't recognized by the filemanager, and inside the Disks utility the USB drive was listed as "Unknown". Inside Gparted the drive showed up as "Unallocated".
The above attempt was yesterday. I tried again today, this time I went straight to the Disks Utility after dd and the drive showed up as "Unknown".
Above was my result in testing the LXQT variant ISO yesterday.
I downloaded today the JWM ISO variant.
DD worked without a problem. Disks Utility shows the filesystems as expected. Drive shows up in filemanager with the four folders in the root of the main partition.
The USB drive booted without any problems. Tested various versions of the boot, debug, non-debug, live, and some others.
Most applications were not working apart from Firefox. Since I am new to Linux From Scratch, I can't properly test audio (it didn't work out-of-the-box). But apart from those things it booted.
If I get the chance then I will test further. As of this moment, my guess the issue is not on my end but with the ISOs provided.
Out of curiosity have these ISOs, that you are offering for download, actually being tested as a fresh install?