I encountered this problem with a Apple Mac Mini running 7.04 Feisty.
I had never inserted a DVD under OSX, then wiped the entire disk and installed Ubuntu. The region code was never set on the drive, and any attempt to play a dvd caused the application to silently bail out with no errors.
I believe the relevant error from VLC is:
Error cracking CSS key for .....
If you try mounting the disk and issuing "cp -ra" you get errors like:
I encountered this problem with a Apple Mac Mini running 7.04 Feisty.
I had never inserted a DVD under OSX, then wiped the entire disk and installed Ubuntu. The region code was never set on the drive, and any attempt to play a dvd caused the application to silently bail out with no errors.
I believe the relevant error from VLC is:
Error cracking CSS key for .....
If you try mounting the disk and issuing "cp -ra" you get errors like:
cp: reading `/media/ cdrom0/ video_ts/ video_ts. vob': Input/output error
regionset is able to tell that there is no region set, thus I conclude there ought to be a hook that spots this and asks you to set it.