Bug#617409: brasero: Brasero corrupts all blank CD-R when burning (was: additional info)

[Thomas Schmitt]

Hi,

for the records: I managed to get my changes in burn-libburn.c into
effect by copying from
  brasero-2.30.3/plugins/libburnia/.libs/libbrasero-libburn.so
to
  /usr/lib/brasero-0/plugins/libbrasero-libburn.so
I assume it is better to achieve this the Debian way.


At least i could verify that it is possible to change the write type from
TAO to SAO by hardcoding it in
  brasero-2.30.3/plugins/libburnia/burn-libburn.c

Re-iterated for convenience:

Change all occurences of
  BURN_WRITE_TAO    to  BURN_WRITE_SAO
  BURN_BLOCK_MODE1  to  BURN_BLOCK_SAO

I advise to issue a loud message on stderr which tells you that
the change is really in effect. I have added at file start:
  #include <stdio.h>
and where i changed the parameters, i added:
  fprintf(stderr, "Brasero libburn-plugin: ***************** brasero_libburn_start_record : Write type is SAO\n");
resp.
  fprintf(stderr, "Brasero libburn-plugin: ***************** brasero_libburn_start_erase : Write type is SAO\n");


The resulting CDs can be examined by
  xorriso -outdev /dev/sr0 -check_media what=disc use=outdev

If it is TAO, then you get two read errors at the end.

If it is SAO, then you get an inappropriate warning that your image
is larger than the CD track. A little bug in libburn's CD inspection
code. It will be fixed by the next release. The image should be usable
anyway. Images from wodim -no-pad show the same effect.


Have a nice day :)

Thomas