[Pkg-libburnia-devel] Bug#617409: brasero: Brasero corrupts all blank CD-R when burning (was: additional info)

[Thomas Schmitt]

Hi,

Ayan George <ayan.george at canonical.com> wrote:
> I tried this
> proposed patch and got the same results (failed burn/unreadable disc).

The subject of your mail refers to Debian Bug#617409 but i assume that
you might also refer to
      https://bugs.launchpad.net/ubuntu/+source/brasero/+bug/780117

So i need to ask:

- What patch exactly did you apply ?
  We had two of them, if i remember right.

  - One was about the suspicion that Brasero prematurely cuts the
    connection between libisofs and growisofs.
    The patch would affect the DVD+R DL runs which end at about 50 %.
      http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=617409#44

  - The other was about an experiment to force write type SAO with
    CD media.
    The experiment looked more promising when i proposed it. It cannot
    explain the report that writing an image file from hard disk does work.
      http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=617409#184
      http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=617409#199

- What problem do you hope to get solved ?
  Regrettably we have a knot of at least two problems, if not more.
  So: What media type ? What undesirable effects ?

- Did you test whether xorriso and/or cdrskin achieve better results
  than Brasero ?
  They use the same libburn as Brasero. If they succeed where Brasero
  fails, then we have a good chance to find the difference.
  If they all fail, then we first need to get my programs to work
  properly, before i can propose a change to Brasero.

  - This xorriso run burns without intermediate hard disk storage:

       xorriso -md5 on \
               -outdev /dev/sr0 \
               -blank as_needed \
               -map /usr/bin /usr/bin

  - This cdrskin run burns an image file from hard disk to medium in
    write type TAO:

       cdrskin -v -tao dev=/dev/sr0 blank=as_needed image.iso

    Use option -sao instead of -tao to test the other write type.


Have a nice day :)

Thomas