Re: DVD does not boot.

["Thomas Schmitt" <scdbackup@gmx.net>]

Hi,

JD wrote:
> > My laptops are all old HP's and Dell's.
> > They all have legacy bios.

and later directly to my mailbox:
> I DO have older DVD's of Knoppix, and they boot up just fine!!!!!

That's possibly a significant observation.
I guess it is about laptop related firmware issues. (But that's not my
turf. When the bootloader shows up, it's the proof that xorriso had done
its job ok.)

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For my old test desktop it works.

I downloaded
  http://ftp.uni-kl.de/pub/linux/knoppix-dvd/KNOPPIX_V8.6-2019-08-08-EN.iso
  http://ftp.uni-kl.de/pub/linux/knoppix-dvd/KNOPPIX_V8.6-2019-08-08-EN.iso.md5
checked the MD5 of the .iso whether it matches .iso.md5:

  $ md5sum KNOPPIX_V8.6-2019-08-08-EN.iso
  37d33c1ea881b2839ecd2af5adb097f8  KNOPPIX_V8.6-2019-08-08-EN.iso

copied onto DVD

  $ xorriso -as cdrecord dev=/dev/sr4 -v fs=32m -eject /dvdbuffer/KNOPPIX_V8.6-2019-08-08-EN.iso
  ...
  Media current: DVD+RW
  Media status : is written , is appendable
  Media summary: 1 session, 2267648 data blocks, 4429m data, 53.6m free

and checked the MD5 again

  $ dd if=/dev/sr4 bs=2048 count=2267648 | md5sum
  ...
  37d33c1ea881b2839ecd2af5adb097f8  -

Put into the drive of my BIOS test machine (desktop, AMD 64 bit, from 2010)
it boots to a big penguin logo, then shows usual Linux boot messages,
and finally a fiery swirl as backdrop of a graphical desktop.
Screen resolution is high, so the icons in the bottom line are of
microscopic size. I manage to get a shell terminal (although i had expected
that "terminator" would offer a shutdown menu) and leave by
  $ sudo shutdown -h now


Have a nice day :)

Thomas