DVD - DriveReady SeekComplete Error

[Sean Hammond]

I installed Ubuntu on my Dell Latitude Cpx laptop which has a
DVD-rom,
the DVD drive doesn't work (in Ubuntu, but the drive itself is not
broken because I used it to install Ubuntu in the first place) and I
don't really know what to do about it.

When I go to `Disks' in the `Computer' menu and click the `CD Rom 1'
link I get:

Unable to mount the volume. There is probably no media in the device.

There isn't a link for a DVD Rom in there, I looked around a bit and
I
can't find it mounted anywhere in /dev/ or /media/ or /mount/.

I scanned the mailing lists etc and tried some things in the command
line that other people had used, for example:

# ls -l /dev/ | grep cdrom
lrwxrwxrwx    1 root     root            3 2004-10-26 11:56 cdrom ->
hdc
brw-rw----    1 root     cdrom     22,   0 2004-10-26 11:56 hdc

And, one that seems particularly revealing:

# dmesg|grep ^hd
hda: IBM-DARA-218000, ATA DISK drive
hda: max request size: 128KiB
hda: 35433216 sectors (18141 MB) w/418KiB Cache, CHS=35152/16/63,
UDMA(33)
hdc: TOSHIBA DVD-ROM SD-C2612, ATAPI CD/DVD-ROM drive
hdc: ATAPI 24X DVD-ROM drive, 192kB Cache, UDMA(33)
hdc: packet command error: status=0x51 { DriveReady SeekComplete
Error
}
hdc: packet command error: error=0x50
hdc: packet command error: status=0x51 { DriveReady SeekComplete
Error
}
hdc: packet command error: error=0x50
hdc: packet command error: status=0x51 { DriveReady SeekComplete
Error
}
hdc: packet command error: error=0x50
hdc: packet command error: status=0x51 { DriveReady SeekComplete
Error
}
hdc: packet command error: error=0x50
hdc: packet command error: status=0x51 { DriveReady SeekComplete
Error
}
hdc: packet command error: error=0x50

I don't know how to deal with this, any clues?

Thanks,
Sean