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Thread: CD/DVD not recognised

  1. #1
    Join Date
    Nov 2009
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    48

    CD/DVD not recognised

    I have had this problem since I installed Lucid about 6 weeks ago, there was no problem with Karmic. I have also been trying Mint 9 which also shows the problem.

    The CD/DVD drive is showing up in Nautilus but no information is listed. I can boot from the drive but no media is recognized in Linux. Using Device Manager, I can see all the relevant information about the drive and using lspci in Terminal I can see that it's correctly installed and ready but still will not mount. I cannot access it at all with Linux.

    I have been waiting and scanning the forums, blogs and other sites to see if a solution appears but nothing yet. Any suggestions ?

  2. #2
    Join Date
    Nov 2009
    Beans
    Hidden!
    Distro
    Kubuntu 18.04 Bionic Beaver

    Re: CD/DVD not recognised

    did you upgrade or fresh install? i upgraded and then upgraded computer and it seems some drivers needed a reinstall as they didnt' work propperly. maybe some config files are not read properly... just guessing here...

  3. #3
    Join Date
    Nov 2009
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    48

    Re: CD/DVD not recognised

    Fresh install.

    When Nautilus is open, I can view the icon for the CD/DVD drive until I insert a disc then the icon disappears, it reappears when the disc is removed.

  4. #4
    Join Date
    Nov 2009
    Beans
    48

    Re: CD/DVD not recognised

    Surely I'm not the only person with this problem, I have read many threads from people with similar probs but not this specific one.

    Sony Vaio VGN-SZ2HP laptop.

    Matshita DVD-RW, CD-RW drive.
    Model: UJ-842D
    Device File: /dev/sr0
    Firmware version: 1.01
    Connection Type: Internal
    Remevable Media: Yes (ejectable)
    Media Compatibility: CD-ROM/CD-R/CD-RW/DVD-ROM/DVD+R/DVD+R DL/DVD+RW/DVD-R/DVD-RW
    Max Read Speed: 28x (33.87 MBps)
    Max Write Speed: 28x (33.87 MBps)
    Media Capacity: -
    Partitioning: -

    Is it possible to update firmware ? Is it possible it is on the wrong port, how do I check and change ports ?
    The fact that I can boot from CD-ROM proves that the drive works at least at a basic level, it obviously can read data and is properly set-up but why does it not work in Linux ?

    I have also noticed that I have no entry in the fstab file for the cdrom or dvd at all
    Here it is;

    # /etc/fstab: static file system information.
    #
    # Use 'blkid -o value -s UUID' to print the universally unique identifier
    # for a device; this may be used with UUID= as a more robust way to name
    # devices that works even if disks are added and removed. See fstab(5).
    #
    # <file system> <mount point> <type> <options> <dump> <pass>
    proc /proc proc nodev,noexec,nosuid 0 0
    # / was on /dev/sda1 during installation
    UUID=00563ab6-53b4-4c1c-b976-87639b35f664 / ext4 errors=remount-ro 0 1
    # swap was on /dev/sda5 during installation
    UUID=60d4582d-53b3-4ec9-ae8a-e03fae3b45a0 none swap sw 0 0



    And here is the output from running lshw

    *-cdrom
    description: DVD writer
    product: UJ-842D
    vendor: MATSHITA
    physical id: 0.0.0
    bus info: scsi@0:0.0.0
    logical name: /dev/cdrom
    logical name: /dev/cdrw
    logical name: /dev/dvd
    logical name: /dev/dvdrw
    logical name: /dev/scd0
    logical name: /dev/sr0
    version: 1.01
    capabilities: removable audio cd-r cd-rw dvd dvd-r
    configuration: ansiversion=5 status=ready
    *-medium
    physical id: 0
    logical name: /dev/cdrom
    Last edited by Indigo340; August 3rd, 2010 at 10:35 AM.

  5. #5
    anewguy is offline I Ubuntu, Therefore, I Am
    Join Date
    Jun 2007
    Location
    Sometimes I visit earth
    Beans
    5,437
    Distro
    Ubuntu 12.04 Precise Pangolin

    Wink Re: CD/DVD not recognised

    Is it possible that somehow permissions got messed up, so when the drive is mounted perhaps you have no permissions to it?

    I would try this:

    - put a disk in the drive
    - open a terminal window (Applications/Accessories/Terminal)
    - type:

    sudo nautilus <press enter>

    Now look and see if you can see the drive and disk. If so, it would indicate a permissions problem.

    Post back the result.

    Dave

  6. #6
    Join Date
    Nov 2009
    Beans
    48

    Re: CD/DVD not recognised

    Thanks for your response Dave. When I enter "sudo nautilus" it opens a file browser with very few files. I cannot find anything on this laptop. In the left hand pane there are 4 locations, 'Desktop, File System, Network and Trash', the only link that contains anything is 'File System' which also contains a folder called 'CDROM' but that contains nothing. I have tried Ctrl H, still nothing.

    Strangely I was using terminal and entered
    ls -l /dev/sr* /dev/dvd*

    Which mounted the drive and I was able to view a DVD, but after I closed Terminal it stopped working and will not respond again

  7. #7
    Join Date
    Jan 2010
    Beans
    42

    Re: CD/DVD not recognised

    Similar problem here.

    Although quite often the cd drive and dvd drive will both mount discs immediately after booting the system. But then after some random length of time they will either unmount or wont mount a newly inserted disc.

    As I write this post both my drives are inaccessible.

    sudo mount /dev/cdrom /media/cdrom

    mount: mount point /media/cdrom does not exist

    Both drives are listed in Disk Utility -

    TSSTcorp CDRW/DVD TSH492B
    HL-DT-ST CD-RW GCE-8320B

    Both drives work fine with Windows XP.

    I have had this problem since installing 10.04 in April. I have posted on various threads on this forum and still not solved it.

  8. #8
    Join Date
    Nov 2009
    Beans
    48

    Re: CD/DVD not recognised

    Anewguy, If I click the icon for the CD/DVD drive in the 'Computer File Browser' and click on 'Properties', under the 'Permissions' tab it says, "Permissions for CD/DVD drive could not be determined" I think this could be the cause, how do I go about changing permissions and what should I change it to ???

  9. #9
    Join Date
    Jan 2010
    Beans
    42

    Re: CD/DVD not recognised

    Sorry to butt in on this thread again but I have solved my long standing CD/DVD drive mounting problems.

    A while back on another thread someone suggested installing the latest kernel (2.6.34). I tried this but no luck.

    Well the latest kernel (2.6.35) was released for Ubuntu a couple of days back. This has solved my mounting problems.

    Add ppa:kernel-ppa/ppa to your software source list

    Reload - then search for "2.6.35" in Synaptic.

    Install the following 3 packages (make sure you choose the correct 3 for either 32 or 64 bit. 14 is the latest in the repository so this may change)

    linux-headers-2.6.35-14
    linux-headers-2.6.35-14-generic
    linux-image-2.6.35-14-generic

    This kernel will now be the default. Everything now works for me and I have had no problems with it.

  10. #10
    Join Date
    Nov 2009
    Beans
    48

    Re: CD/DVD not recognised

    Thanks I have tried various combinations of "http://ppa:kernel-ppa.com/ppa/ubuntu lucid main" etc but it won't let me add this as a source, obviously I am missing something but don't know what to do.

    Software sources/Other software/Add source/ or is there a better way with Terminal???



    I think the contents of this thread http://ubuntuforums.org/showthread.php?t=1545946&highlight=update+kernel might have the answer, I am trying it now.
    Last edited by Indigo340; August 5th, 2010 at 04:32 PM.

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