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[JB VideoLAN <502426@xxxxxxxxxxxxxxxxxx>]

So, this is a dvdcss bug more than a dvdread one.

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https://bugs.launchpad.net/bugs/502426

Title:
  DVD playback broken ("Media region code is mismatched to logical unit
  region")

Status in “libdvdread” package in Ubuntu:
  Confirmed

Bug description:
  I just upgraded my Dell XPS M1330 to version 9.10 and since then I can
  no longer play dvds.

  No matter what player (totem, mplayer, vlc, dvdrip) I try nothing
  works.

  The syslog is cluttered with lines like this:

  Jan  2 22:00:19 tjalfi kernel: [  981.470251] sr 3:0:0:0: [sr0] Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
  Jan  2 22:00:19 tjalfi kernel: [  981.470263] sr 3:0:0:0: [sr0] Sense Key : Illegal Request [current]
  Jan  2 22:00:19 tjalfi kernel: [  981.470273] sr 3:0:0:0: [sr0] Add. Sense: Media region code is mismatched to logical unit region
  Jan  2 22:00:19 tjalfi kernel: [  981.470288] end_request: I/O error, dev sr0, sector 215848
  Jan  2 22:00:19 tjalfi kernel: [  981.470298] Buffer I/O error on device sr0, logical block 26981
  Jan  2 22:00:19 tjalfi kernel: [  981.470312] Buffer I/O error on device sr0, logical block 26982
  Jan  2 22:00:19 tjalfi kernel: [  981.470319] Buffer I/O error on device sr0, logical block 26983
  Jan  2 22:00:19 tjalfi kernel: [  981.470325] Buffer I/O error on device sr0, logical block 26984
  Jan  2 22:00:19 tjalfi kernel: [  981.470332] Buffer I/O error on device sr0, logical block 26985
  Jan  2 22:00:19 tjalfi kernel: [  981.470338] Buffer I/O error on device sr0, logical block 26986
  Jan  2 22:00:19 tjalfi kernel: [  981.470344] Buffer I/O error on device sr0, logical block 26987
  Jan  2 22:00:19 tjalfi kernel: [  981.470351] Buffer I/O error on device sr0, logical block 26988
  Jan  2 22:00:19 tjalfi kernel: [  981.470358] Buffer I/O error on device sr0, logical block 26989
  Jan  2 22:00:19 tjalfi kernel: [  981.470364] Buffer I/O error on device sr0, logical block 26990
  Jan  2 22:00:27 tjalfi init: ureadahead-other main process (7527) terminated with status 4

  I tried nearly 200 different dvds and was able to play none of them.

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