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I just noticed that if a insert a CD or a DVD of any kind, the Drive will start spinning but it will not show the mounted disc. Earlier it used to ask me what to do with the media inserted. Now it doesn't even do that. I ran the following commands in terminal:

$ eject -n
eject: device is `/dev/sr0'

$ sudo mount -o ro,unhide,uid=1000 /dev/cdrom /mnt/cdrom
mount: mount point /mnt/cdrom does not exist

What can I do to get the functionality back on my drive? I am running Ubuntu 11.10.

Updates

  • thanks Waltinator: I ran the 'dmesg' but don't know what I'm looking for. Im a newbie on this. The same thing with the 'ls -rlt /var/log' command. Should I create the directory for the mount? at this point really don't know what to do. – Cisco Sán 7 hours ago

  • After I successfully inserted a CD, following are the first 3 lines of dmesg command:

    $ dmesg
    [ 4804.416018] wlan0: no IPv6 routers present  
    [ 8214.125450] ISdit ISO 9660 Extensions: Microsoft Joliet Level 3  
    [ 8214.136556] ISO 9660 Extensions: RRIP_1991A  
    

    Reply by Waltinator:

    The first line is a previous event, my wireless going online. The next 2 lines are a good result. The number in square brackets is "seconds since boot", the rest of the line is usually helpful. And no, you should NOT create the mount point. Let's try to get the automatic mounting to work. – waltinator

  • These are my last 3 lines of dmesg:

    [ 18.130819] init: plymouth-stop pre-start process (1396) terminated with status 1  
    [ 28.780011] wlan0: no IPv6 routers present  
    [ 505.632119] CE: hpet increased min_delta_ns to 20113 nsec
    

    Reply by waltinator:

    It looks like your CD/DVD drive is not connected to the data bus, and not causing an interrupt when you insert a platter. Try dmesg | grep -A8 CD-ROM which should show you what the system thought was available when it came up. – waltinator

  • This is my terminal output:

    $ dmesg | grep -A8 CD-ROM
    [0.774351] scsi 0:0:0:0: CD-ROM HL-DT-ST DVD+-RW GSA-T40N A100 PQ: 0 ANSI:  5
    [0.778117] sr0: scsi3-mmc drive: 24x/24x writer dvd-ram cd/rw xa/form2 cdda tray
    [0.778122] cdrom: Uniform CD-ROM driver Revision: 3.20
    [0.778282] sr 0:0:0:0: Attached scsi CD-ROM sr0
    [0.778340] sr 0:0:0:0: Attached scsi generic sg0 type 5
    [0.780416] Freeing unused kernel memory: 984k freed  
    [0.780732] Write protecting the kernel read-only data: 10240k  
    [0.780986] Freeing unused kernel memory: 20k freed  
    [0.786331] Freeing unused kernel memory: 1400k freed  
    [0.804912] udevd[90]: starting version 173   
    [0.874178] r8169 Gigabit Ethernet driver 2.3LK-NAPI loaded  
    [0.874208] r8169 0000:02:00.0: PCI INT A -> GSI 16 (level, low) -> IRQ 16
    

    Reply by waltinator:

    OK, your system sees the drive. Can you open and close the tray with eject and eject -t? Run udevadm monitor while you insert a CD (type ^C when done) and see if you get "change" and "add" messages. – waltinator

  • eject works perfectly; eject -t does nothing.

    $ udevadm monitor
    KERNEL[13771.009267] change /devices/pci0000:00/0000:00:1f.1/host0/target0:0:0/0:0:0:0/block/sr0 (block)
    UDEV [13773.878887] change /devices/pci0000:00/0000:00:1f.1/host0/target0:0:0/0:0:0  /block/sr0 (block)
    
  • Terminal output of sudo hwinfo --cdrom:

    $ sudo hwinfo --cdrom
    hal.1: read hal dataprocess 2753: arguments to dbus_move_error() were incorrect,   assertion "(dest) == NULL || !dbus_error_is_set ((dest))" failed in file ../../dbus/dbus-errors.c line 280.  
    This is normally a bug in some application using the D-Bus library.  
    libhal.c 3483 : Error unsubscribing to signals, error=The name org.freedesktop.Hal was not provided by any .service files  
    22: SCSI 00.0: 10602 CD-ROM (DVD)                               
      [Created at block.247]  
      Unique ID: KD9E.JgkxTS4hgl2  
      Parent ID: 3p2J.gdUMCD83e+E  
      SysFS ID: /class/block/sr0  
      SysFS BusID: 0:0:0:0  
      SysFS Device Link: /devices/pci0000:00/0000:00:1f.1/host0/target0:0:0/0:0:0:0  
      Hardware Class: cdrom  
      Model: "HL-DT-ST DVD+-RW GSA-T40N"  
      Vendor: "HL-DT-ST"  
      Device: "DVD+-RW GSA-T40N"  
      Revision: "A100"  
      Driver: "ata_piix", "sr"  
      Driver Modules: "ata_piix"  
      Device File: /dev/sr0 (/dev/sg0)  
      Device Files: /dev/sr0, /dev/scd0, /dev/disk/by-id/ata-HL-DT-ST_DVD+_-RW_GSA-T40N_K048BJ74257, /dev/disk/by-path/pci-0000:00:1f.1-scsi-0:0:0:0, /dev/cdrom, /dev/cdrw, /dev/dvd, /dev/dvdrw  
      Device Number: block 11:0 (char 21:0)  
      Features: DVD  
      Config Status: cfg=new, avail=yes, need=no, active=unknown  
      Attached to: #17 (IDE interface)  
      Drive Speed: 31  
      Volume ID: "Movie"  
      Publisher: "INTERVIDEO"  
      Creation date: "20050424162207000"  
    
share|improve this question
    
Last night I noticed that if I tried to burn the disc with Brasero, the program could not detect the disc. Then I tried VLC and it played, don't know how or why. But still I cannot navigate through the files on the disc, and it won't show up mounted. –  Cisco Sán Nov 8 '11 at 13:54
    
The last three lines lead me to believe that the system sees the DVD: Volume ID: "Movie" Publisher: "INTERVIDEO" Creation date: "20050424162207000" Put in a DVD, wait 60 seconds, then type df -m –  waltinator Nov 10 '11 at 0:25

2 Answers 2

The sudo mount ... command would have worked better if you had ensured that the target directory existed, via sudo mkdir -p /mnt/cdrom first.

To figure out why, insert a CD/DVD, wait until it stops spinning, and do dmesg (or dmesg | less if you want to see it all), and check the most recent (last in file) entries to see what your system had to say about the CD/DVD. Also do ls -rlt /var/log and look at the ends of recently modified logs.

share|improve this answer
    
thanks Waltinator: I ran the 'dmesg' but don't know what I'm looking for. Im a newbie on this. The same thing with the 'ls -rlt /var/log' command. Should I create the directory for the mount? at this point really don't know what to do. –  Cisco Sán Nov 7 '11 at 19:31
    
Here are 3 lines from my dmesg after I successfully inserted a CD: [ 4804.416018] wlan0: no IPv6 routers present [ 8214.125450] ISdit ISO 9660 Extensions: Microsoft Joliet Level 3 [ 8214.136556] ISO 9660 Extensions: RRIP_1991A The first line is a previous event, my wireless going online. The next 2 lines are a good result. The number in square brackets is "seconds since boot", the rest of the line is usually helpful. And no, you should NOT create the mount point. Let's try to get the automatic mounting to work. –  waltinator Nov 7 '11 at 19:41
    
ok this are my last 3 lines on the 'dmesg' [ 18.130819] init: plymouth-stop pre-start process (1396) terminated with status 1 [ 28.780011] wlan0: no IPv6 routers present [ 505.632119] CE: hpet increased min_delta_ns to 20113 nsec –  Cisco Sán Nov 7 '11 at 19:45
    
It looks like your CD/DVD drive is not connected to the data bus, and not causing an interrupt when you insert a platter. –  waltinator Nov 7 '11 at 19:48
    
Try dmesg | grep -A8 CD-ROM which should show you what the system thought was available when it came up. –  waltinator Nov 7 '11 at 19:52

Had the same problem on 11.04. The solution is to install udftools. Open terminal (Ctrl+Alt+T) then type:

sudo apt-get install udftools
share|improve this answer
    
Welcome to Ask Ubuntu. Can you expand your answer as to how installing udftools can solve the problem? –  Peachy Sep 25 '12 at 2:42

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