If everything is working properly, and libdvdcss2 is in use, then region codes are ignored in Linux.
In this case libdvdcss2 is throwing an error ..... at some point and thereafter, into the DVD.
So the problem is what would cause this?
Sure, setting a region code in the drive might
'fix' it ..... but could anyone tell me why?
Typically after about 20 minutes of trying to retrieve the keys, some are successfully retrieved meaning some chapters on a disc will play, others not.
That behaviour implies a difficulty in reading the disc.
That makes me wonder if there is some extra protection built in to the discs in question which might be causing a read problem, and the difficulty is not in the software.
Producers have been know to introduce deliberate track breaks to prevent (or try to) the discs being copied.
Maybe something of this nature is interfering with libdvdcss2 reading the encryption ....... speculation
I would like to know the cause of the problem