I was having this problem too. I had installed CSS , I could see and browse the DVD, but it wouldn't play.
I could play unencrypted VOBs, but not encrypted ones. If I did a "Show properties" of an encrypted VOB, Nautilus would crash. I eventaully traced the problem: no region set on the DVD drive. I was getting the following messages on dmesg: [ 167.329314] sr 2:0:0:0: [sr0] CDB: Read(10): 28 00 00 00 02 a2 00 00 02 00 [ 167.329332] end_request: I/O error, dev sr0, sector 2696 [ 167.335004] sr 2:0:0:0: [sr0] Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE [ 167.335015] sr 2:0:0:0: [sr0] Sense Key : Illegal Request [current] [ 167.335024] sr 2:0:0:0: [sr0] Add. Sense: Media region code is mismatched to logical unit region [ 167.335035] sr 2:0:0:0: [sr0] CDB: Read(10): 28 00 00 00 02 a2 00 00 02 00 [ 167.335053] end_request: I/O error, dev sr0, sector 2696 Solution: install and use regionset. Still, this should be fixed centrally: Nautilus shouldn't crash, the message from mplayer should include the warning that a region code may not be set. ** Changed in: gstreamer0.10 (Ubuntu) Status: Expired => Confirmed -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/782411 Title: Could not read DVD. This may be because the DVD is encrypted and a DVD decryption library is not installed. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gstreamer0.10/+bug/782411/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs