Cannot mount CDROM DVD drives after upgrading to Ubuntu 10.04 LTS Lucid Lynx

[kaiwi]

Hi all

I upgraded from Ubuntu 9.10 to Ubuntu 10.04 LTS Lucid Lynx yesterday. Now Ubuntu no longer recognizes my CDROM/DVD drives. Never had this problem with one of the earlier versions of Ubuntu.

Now under Ubuntu 10.04 LTS Lucid Lynx, when I insert a CDROM or an audio CD in any one of my two CD drives, the drive in question is not mounted automatically.

When I click e.g. on "Places/cdrom0", Ubuntu 10.04 opens a window saying

Error
Unable to mount cdrom0
mount: special device /dev/hda does not exist

Same story when I use the "mount" command in a terminal:

kai@kai-desktop:~$ cd /media
kai@kai-desktop:/media$ ls
C:  cdrom  cdrom0  cdrom1
kai@kai-desktop:/media$ sudo mount cdrom0
[sudo] password for kai: 
mount: special device /dev/hda does not exist

For the experts among you, here's my /etc/fstab file:

# /etc/fstab: static file system information.
#
#  -- This file has been automaticly generated by ntfs-config --
#
# <file system> <mount point>   <type>  <options>       <dump>  <pass>

proc /proc proc defaults 0 0
# Entry for /dev/sdb1 :
UUID=1cd0c30b-c8a7-4079-8088-50da2d791998 / ext3 defaults,errors=remount-ro,relatime 0 1
# Entry for /dev/sdb5 :
UUID=5bb1c419-e24f-433f-8133-bd5735cf11e1 none swap sw 0 0
/dev/hda /media/cdrom0 udf,iso9660 user,noauto 0 0
/dev/hdb /media/cdrom1 udf,iso9660 user,noauto 0 0
/dev/sda1 /media/C: ntfs-3g defaults,locale=en_US.UTF-8 0 0 

Any suggestions please?

Already came across the following bug report:
https://bugs.launchpad.net/ubuntu/+bug/554433
Not sure whether it's the same issue though.

Kai

[Horatio]

look for it with the command 'lshal | egrep cdrom'

and

also try ls -l /dev/{cd,dvd}*

for myself I get

$ ls -l /dev/{cd,dvd}*
lrwxrwxrwx 1 root root 3 2010-05-01 05:00 /dev/cdrom -> sr0
lrwxrwxrwx 1 root root 3 2010-05-01 05:00 /dev/cdrw -> sr0
lrwxrwxrwx 1 root root 3 2010-05-01 05:00 /dev/dvd -> sr0
lrwxrwxrwx 1 root root 3 2010-05-01 05:00 /dev/dvdrw -> sr0

then

sudo hdparm -I /dev/sr0

/dev/sr0:

ATAPI CD-ROM, with removable media
Model Number: HL-DT-ST DVDRAM GH22NS50
Serial Number: K0097NG2700
Firmware Revision: TN01
Transport: Serial, ATA8-AST, SATA 1.0a, SATA II Extensions, SATA Rev 2.5, SATA Rev 2.6
Standards:
Likely used CD-ROM ATAPI-1
Configuration:
DRQ response: 50us.
Packet size: 12 bytes
cache/buffer size = unknown
Capabilities:
LBA, IORDY(can be disabled)
DMA: mdma0 mdma1 mdma2 udma0 udma1 udma2 udma3 udma4 *udma5
Cycle time: min=120ns recommended=120ns
PIO: pio0 pio1 pio2 pio3 pio4
Cycle time: no flow control=120ns IORDY flow control=120ns

So now I know that the drive was detected.

[FishRCynic]

try commenting out the cdroms in fstab

add the # in front of the lines

#/dev/hda /media/cdrom0 udf,iso9660 user,noauto 0 0
#/dev/hdb /media/cdrom1 udf,iso9660 user,noauto 0 0

and see if that helps

[kaiwi]

Hi

Thanks to both of you!

Miraculously everything worked fine today after reboot (with an empty disc in one of the drives, don't yet know if that made the difference).

Didn't change anything in my configuration files.

In fact that strange behaviour would agree with some observations reported in that thread I referenced in my initial message.

Thanks again and all the best

[foolsday]

I am also having this problem. After upgrading to Lucid my CDROM no longer auto mounts disks regardless of what type of disk I put in the drive (cd-r, commercial audio, commercial dvd, etc). An irritating work around is to start the machine with any kind of disk in the drive. THEN it works normally until the next reboot. My fstab looks normal. The drive shows up fine with hdparm when mounting is working:

$ sudo hdparm -I /dev/sr0
[sudo] password for foolsday:

/dev/sr0:

ATAPI CD-ROM, with removable media
Model Number: LITE-ON DVDRW LH-20A1H
Serial Number:
Firmware Revision: LL0A
Standards:
Used: ATAPI for CD-ROMs, SFF-8020i, r2.5
Supported: CD-ROM ATAPI-2
Configuration:
DRQ response: 50us.
Packet size: 12 bytes
cache/buffer size = unknown
Capabilities:
LBA, IORDY(cannot be disabled)
DMA: mdma0 mdma1 mdma2 udma0 udma1 *udma2 udma3 udma4
Cycle time: min=120ns recommended=120ns
PIO: pio0 pio1 pio2 pio3 pio4
Cycle time: no flow control=240ns IORDY flow control=120ns
Commands/features:
Enabled Supported:
* PACKET command feature set
* DEVICE_RESET command
* Mandatory FLUSH_CACHE
HW reset results:
CBLID- below Vih
Device num = 0

and gives this when it's not:

$ sudo hdparm -I /dev/sr0
[sudo] password for foolsday:

/dev/sr0:
HDIO_DRIVE_CMD(identify) failed: Invalid exchange

EDIT: I just restarted and tried again. This time hdparm gave the correct output above but when I inserted a disk I got a dialog that said "DBus error org.freedesktop.DBus.Error.NoReply: Message did not receive a reply (timeout by message bus)"

[Xalrons]

I'm having the same problem, except that the drive still doesn't work if I reboot my machine with a disk inserted.

[kaiwi]

Sorry for not responding to you earlier.

I have now commented out the respective entries in /etc/fstab and am happy to say that my CD drives have been detected ever since

Thanks again

try commenting out the cdroms in fstab

add the # in front of the lines

#/dev/hda /media/cdrom0 udf,iso9660 user,noauto 0 0
#/dev/hdb /media/cdrom1 udf,iso9660 user,noauto 0 0

and see if that helps

[ebruzzone]

Hi there! can anyone please tell me how to edit the fstab ? I am desperate trying to mount my cd/dvd.

thanks a lot!

[Laysan_A]

Hi ebruzzone,

It's been four weeks, and you've no doubt moved on, but I felt bad for you not receiving an answer to such a basic question.

Open a terminal and type sudo kate (or sudo gedit). Then open /etc/fstab in kate (gedit) and do what you need to do.