The son really wanted to install Ubuntu to his laptop, but it has failed repeatedly. Seems to be related to the squashfs used on the CD/DVD, but we don't know that for sure.
As an alternative, I offered to download a BSD for him, and settled on PCBSD.
OK, downloaded, burnt the ISO on a Ubuntu machine, and the burning process completed successfully - or so Brasero reported. But, I was unable to mount or read the DVD. Figuring that something had gone wrong, I discarded the coaster.
Over the network, I had (another) son burn the image on Windows. Windows mounted the burnt DVD, so I used it to install to the laptop. Something isn't right, and BSD won't finish booting - but that's another issue. For learning purposes, I decided to install PCBSD to a VM on the Ubuntu machine, hoping to figure out what we did wrong on the laptop. (Another possibly related issue - when I mount the image instead of the disk, PCBSD reports that the disk drive doesn't respond to ATAPI commands, so installation in the VM fails.)
TALK ABOUT WEIRD!!! UBUNTU WILL NOT MOUNT THIS DVD EITHER!
I have this disk in the drive, which we used last night to install BSD, but Ubuntu won't read it. I might understand if Windows failed to mount a *nix image, but I'm using *nix, trying to read something that is presumably a *nix FS if it is not a standard DVD file system
Can anyone enlighten me as to what file system is used on PCBSD's installation disk, and what packages I may need to install on Ubuntu?
The exact title of the downloaded disk image is "PCBSD7.1-x86-DVD.iso"
Is it possible that despite having "installed" the operating system, the FS is corrupt, or something?
EDIT: quick update - having read part of knowledge database, I have disabled ACPI within the VM, and installation seems to be progressing normally. If this works, I may very well figure out the problem on the boy's laptop. So, one problem solved!