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Thread: Automount Video DVD

  1. #11
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    Default Re: Automount Video DVD

    If you have at least some DVD that play successfully your systems are likely basically sound. But not all DVDs are created equal, I use 4-5 different discs from different vendors to test compliance and occasionally one or two are not recognized on faulty systems while the others play...
    Since Gnome Disks shows "Unknown" contents I wonder if your "faulty" DVD uses a format that might be "special" in any way, possibly being a "multi session" disk, with software alongside video contents or the like.
    Gnome Disks shows the correct size (apparently) so I guess that the disk drives and the basic disk drivers are OK.
    Please show the result of:
    Code:
    lsblk -o +FSTYPE /dev/sr0
    (assuming that your DVD drive is sr0) once the DVD finally gets mounted and please specify if this is a commercial video DVD or if you have burnt it yourself.
    Main: Leap 15 Gnome on i7 4720HQ + Geforce GTX960M
    Test: Leap 42.3 (& others) on Core2Duo + GM965

  2. #12

    Default Re: Automount Video DVD

    The DVDs that are giving me trouble are commercial ones. (But only the 2 linux systems are troublesome)

    Code:
    harvey@linux-zeln:~> lsblk -o +FSTYPE /dev/sr0
    NAME MAJ:MIN RM  SIZE RO TYPE MOUNTPOINT                              FSTYPE
    sr0   11:0    1  6.4G  0 rom  /run/media/harvey/DAS_DOPPELTE_LOTTCHEN 
    
    This is the result from the laptop, in this case. Neither DVD gets mounted on the desktop within a reasonable time, whereby there is no problem with data DVD/CDs or a self-made video DVD.

  3. #13
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    Default Re: Automount Video DVD

    Could it be a problem with the drive itself? I have seen similar on DVD drives that are just a bit off-track, or with dirty lenses.
    -Gerry Makaro
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  4. #14

    Default Re: Automount Video DVD

    Quote Originally Posted by Fraser_Bell View Post
    Could it be a problem with the drive itself? I have seen similar on DVD drives that are just a bit off-track, or with dirty lenses.
    Yes, I also had this thought, too. But I have been checking on two different configurations (laptop and desktop) and with several different DVDs. Although the behaviour is not identical in each case, it is similar enough to eliminate that as cause, at least on the laptop. There the two commercial DVDs get mounted but will not play. On the desktop, the same commercial DVDs may, perhaps, not mount at all, but if they do, they don't play, whereas other commercial DVDs (e.g. 20 min films) or self-made DVDs/CDs (Data, Audio/Video), pose no problems at all.

  5. #15
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    Default Re: Automount Video DVD

    I'm just guessing here
    have you set or changed the region code of your dvd device
    I know linux ignores region code but windows demands it if you had a windows running that dvd it might have set some sort of bit in the dvd bios
    you should check with the drive's manufacturers cos a lot of DVD devices do get flashable bios updates
    I use to do this in the past as some updates included updated info about DVD R- and R+ devices
    under linux if a device is not mountable either the DVD disk is damaged or the DVD reader is dying there shouldn't be any software issue mounting the drive
    you do need libdvdcss2 to play region css encoded (commercial) disks tho
    Last edited by I_A; 01-Sep-2018 at 02:10.

  6. #16
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    Default Re: Automount Video DVD

    Quote Originally Posted by hnimmo View Post
    The DVDs that are giving me trouble are commercial ones. (But only the 2 linux systems are troublesome)

    Code:
    harvey@linux-zeln:~> lsblk -o +FSTYPE /dev/sr0
    NAME MAJ:MIN RM  SIZE RO TYPE MOUNTPOINT                              FSTYPE
    sr0   11:0    1  6.4G  0 rom  /run/media/harvey/DAS_DOPPELTE_LOTTCHEN 
    
    This is the result from the laptop, in this case. Neither DVD gets mounted on the desktop within a reasonable time, whereby there is no problem with data DVD/CDs or a self-made video DVD.
    The output looks pretty "normal", but invoking the command as normal user reads data from the disk cache; to read from the disk itself try to issue the same as superuser, e.g.:
    Code:
    bruno@LT_B:~> lsblk -o +FSTYPE /dev/sr0
    NAME MAJ:MIN RM  SIZE RO TYPE MOUNTPOINT                       FSTYPE
    sr0   11:0    1  7,7G  0 rom  /run/media/bruno/THE_movie_label
    bruno@LT_B:~> sudo lsblk -o +FSTYPE /dev/sr0
    [sudo] password for root: 
    NAME MAJ:MIN RM  SIZE RO TYPE MOUNTPOINT                       FSTYPE
    sr0   11:0    1  7,7G  0 rom  /run/media/bruno/THE_movie_label udf
    bruno@LT_B:~>
    and see if one of the working DVDs shows any difference.
    The very long mount times make me wonder if there is something in the format of those disks that is not (yet) recognized by libblkid1 or possibly some odd protection technique not overcome by libdvdcss2.
    Not being able to reproduce here, I cannot go much further than that.
    I would suggest to open a bug report, but if that is a corner case I doubt that they can do anything good without the "suspect" DVDs.
    Main: Leap 15 Gnome on i7 4720HQ + Geforce GTX960M
    Test: Leap 42.3 (& others) on Core2Duo + GM965

  7. #17

    Default Re: Automount Video DVD

    Quote Originally Posted by I_A View Post
    I'm just guessing here
    have you set or changed the region code of your dvd device
    I know linux ignores region code but windows demands it if you had a windows running that dvd it might have set some sort of bit in the dvd bios
    you should check with the drive's manufacturers cos a lot of DVD devices do get flashable bios updates
    I use to do this in the past as some updates included updated info about DVD R- and R+ devices
    under linux if a device is not mountable either the DVD disk is damaged or the DVD reader is dying there shouldn't be any software issue mounting the drive
    you do need libdvdcss2 to play region css encoded (commercial) disks tho
    Since I don't know what the region code is nor how to change it, I guess it must still be OK.

  8. #18
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    Italy
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    Default Re: Automount Video DVD

    Quote Originally Posted by hnimmo View Post
    Code:
    harvey@linux-zeln:~> lsblk -o +FSTYPE /dev/sr0
    NAME MAJ:MIN RM  SIZE RO TYPE MOUNTPOINT                              FSTYPE
    sr0   11:0    1  6.4G  0 rom  /run/media/harvey/DAS_DOPPELTE_LOTTCHEN 
    
    I did a search and came up with this : on that DVD's back cover I see "Diese DVD ist kopiergeschuetzt!".
    Maybe they use a protection technique that allows playing the disk in DVD-video mode (with decoding within suitable DVD drives) and not reading the disk as a "data-DVD-ROM" with software decoding as Linux systems usually do via libdvdcss2.
    That might explain why Gnome-Disks lists that disk as "Content Unknown", but that is beyond my knowledge so I can only guess here.
    BTW that cover doesn't show any "Region Code" protection, so maybe region is not an issue here.
    Main: Leap 15 Gnome on i7 4720HQ + Geforce GTX960M
    Test: Leap 42.3 (& others) on Core2Duo + GM965

  9. #19

    Default Re: Automount Video DVD

    Quote Originally Posted by OrsoBruno View Post
    The output looks pretty "normal", but invoking the command as normal user reads data from the disk cache; to read from the disk itself try to issue the same as superuser, e.g.:
    Code:
    bruno@LT_B:~> lsblk -o +FSTYPE /dev/sr0
    NAME MAJ:MIN RM  SIZE RO TYPE MOUNTPOINT                       FSTYPE
    sr0   11:0    1  7,7G  0 rom  /run/media/bruno/THE_movie_label
    bruno@LT_B:~> sudo lsblk -o +FSTYPE /dev/sr0
    [sudo] password for root: 
    NAME MAJ:MIN RM  SIZE RO TYPE MOUNTPOINT                       FSTYPE
    sr0   11:0    1  7,7G  0 rom  /run/media/bruno/THE_movie_label udf
    bruno@LT_B:~>
    and see if one of the working DVDs shows any difference.
    The very long mount times make me wonder if there is something in the format of those disks that is not (yet) recognized by libblkid1 or possibly some odd protection technique not overcome by libdvdcss2.
    Not being able to reproduce here, I cannot go much further than that.
    I would suggest to open a bug report, but if that is a corner case I doubt that they can do anything good without the "suspect" DVDs.
    Aha...should have twigged that one! Thanks for the tip.

    All DVDs I have been using to test this behaviour are of FSTYPE udf

  10. #20

    Default Re: Automount Video DVD

    Quote Originally Posted by OrsoBruno View Post
    I did a search and came up with this : on that DVD's back cover I see "Diese DVD ist kopiergeschuetzt!".
    Maybe they use a protection technique that allows playing the disk in DVD-video mode (with decoding within suitable DVD drives) and not reading the disk as a "data-DVD-ROM" with software decoding as Linux systems usually do via libdvdcss2.
    That might explain why Gnome-Disks lists that disk as "Content Unknown", but that is beyond my knowledge so I can only guess here.
    BTW that cover doesn't show any "Region Code" protection, so maybe region is not an issue here.
    The two commercial DVDs that don't play (or even mount (easily)) are 'kopiergeschützt'. But I'm not trying to copy them, I only want to play them! That's what I bought them for!

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