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As i insert a DVD in my drive (on a laptop) using Kubuntu 12.04, the DVD is not detected. The drive takes the DVD, I can hear it munching on it for a while, and then nothing. Even ejecting the DVD becomes a hassle, I need to do that at boot time otherwise the OS won't allow me to eject.
Kubuntu 12.04 used to read and mount the same DVDs just fine a week ago.

Edit: since I am able to boot from CD, can I safely assume the issue is not a hardware issue?

How can I fix this?

wodim --devices returns:

wodim: Overview of accessible drives (1 found) :

-------------------------------------------------------------------------

 0  dev='/dev/sg1'      rwrw-- : 'Optiarc' 'DVD+-RW AD-7640A'

-------------------------------------------------------------------------

sudo lshw -class disk returns:

  *-cdrom                 

       description: DVD-RAM writer

       product: DVD+-RW AD-7640A

       vendor: Optiarc

       physical id: 0.0.0

       bus info: scsi@3:0.0.0

       logical name: /dev/cdrom2

       logical name: /dev/cdrw2

       logical name: /dev/dvd2

       logical name: /dev/dvdrw2

       logical name: /dev/sr0

       version: JD06

       capabilities: removable audio cd-r cd-rw dvd dvd-r dvd-ram

       configuration: ansiversion=5 status=open

lspci returns:

00:00.0 Host bridge: Intel Corporation Mobile PM965/GM965/GL960 Memory Controller Hub (rev 0c)                                                               

00:02.0 VGA compatible controller: Intel Corporation Mobile GM965/GL960 Integrated Graphics Controller (primary) (rev 0c)

00:02.1 Display controller: Intel Corporation Mobile GM965/GL960 Integrated Graphics Controller (secondary) (rev 0c)

00:1a.0 USB controller: Intel Corporation 82801H (ICH8 Family) USB UHCI Controller #4 (rev 03)

00:1a.1 USB controller: Intel Corporation 82801H (ICH8 Family) USB UHCI Controller #5 (rev 03)

00:1a.7 USB controller: Intel Corporation 82801H (ICH8 Family) USB2 EHCI Controller #2 (rev 03)

00:1b.0 Audio device: Intel Corporation 82801H (ICH8 Family) HD Audio Controller (rev 03)

00:1c.0 PCI bridge: Intel Corporation 82801H (ICH8 Family) PCI Express Port 1 (rev 03)

00:1c.1 PCI bridge: Intel Corporation 82801H (ICH8 Family) PCI Express Port 2 (rev 03)

00:1c.3 PCI bridge: Intel Corporation 82801H (ICH8 Family) PCI Express Port 4 (rev 03)

00:1c.4 PCI bridge: Intel Corporation 82801H (ICH8 Family) PCI Express Port 5 (rev 03)

00:1d.0 USB controller: Intel Corporation 82801H (ICH8 Family) USB UHCI Controller #1 (rev 03)

00:1d.1 USB controller: Intel Corporation 82801H (ICH8 Family) USB UHCI Controller #2 (rev 03)

00:1d.2 USB controller: Intel Corporation 82801H (ICH8 Family) USB UHCI Controller #3 (rev 03)

00:1d.7 USB controller: Intel Corporation 82801H (ICH8 Family) USB2 EHCI Controller #1 (rev 03)

00:1e.0 PCI bridge: Intel Corporation 82801 Mobile PCI Bridge (rev f3)

00:1f.0 ISA bridge: Intel Corporation 82801HM (ICH8M) LPC Interface Controller (rev 03)

00:1f.1 IDE interface: Intel Corporation 82801HM/HEM (ICH8M/ICH8M-E) IDE Controller (rev 03)

00:1f.2 SATA controller: Intel Corporation 82801HM/HEM (ICH8M/ICH8M-E) SATA Controller [AHCI mode] (rev 03)

00:1f.3 SMBus: Intel Corporation 82801H (ICH8 Family) SMBus Controller (rev 03)

06:00.0 Network controller: Broadcom Corporation BCM4312 802.11b/g LP-PHY (rev 01)

07:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168B PCI Express Gigabit Ethernet controller (rev 02)

08:05.0 FireWire (IEEE 1394): O2 Micro, Inc. Firewire (IEEE 1394) (rev 02)

08:05.2 SD Host controller: O2 Micro, Inc. Integrated MMC/SD Controller (rev 02)

08:05.3 Mass storage controller: O2 Micro, Inc. Integrated MS/xD Controller (rev 01)

and lsusb:

Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub

Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub

Bus 005 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub

Bus 006 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub

Bus 007 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub

Bus 001 Device 003: ID 0c45:63e0 Microdia Sonix Integrated Webcam

Bus 003 Device 002: ID 0483:2016 SGS Thomson Microelectronics Fingerprint Reader

The /etc/modprobe.d/blacklist.conf contains:

# This file lists those modules which we don't want to be loaded by

# alias expansion, usually so some other driver will be loaded for the

# device instead.



# evbug is a debug tool that should be loaded explicitly

blacklist evbug



# these drivers are very simple, the HID drivers are usually preferred

blacklist usbmouse

blacklist usbkbd



# replaced by e100

blacklist eepro100



# replaced by tulip

blacklist de4x5



# causes no end of confusion by creating unexpected network interfaces

blacklist eth1394



# snd_intel8x0m can interfere with snd_intel8x0, doesn't seem to support much

# hardware on its own (Ubuntu bug #2011, #6810)

blacklist snd_intel8x0m



# Conflicts with dvb driver (which is better for handling this device)

blacklist snd_aw2



# causes failure to suspend on HP compaq nc6000 (Ubuntu: #10306)

blacklist i2c_i801



# replaced by p54pci

blacklist prism54



# replaced by b43 and ssb.

blacklist bcm43xx



# most apps now use garmin usb driver directly (Ubuntu: #114565)

blacklist garmin_gps



# replaced by asus-laptop (Ubuntu: #184721)

blacklist asus_acpi



# low-quality, just noise when being used for sound playback, causes

# hangs at desktop session start (Ubuntu: #246969)

blacklist snd_pcsp



# ugly and loud noise, getting on everyone's nerves; this should be done by a

# nice pulseaudio bing (Ubuntu: #77010)

blacklist pcspkr



# EDAC driver for amd76x clashes with the agp driver preventing the aperture

# from being initialised (Ubuntu: #297750). Blacklist so that the driver

# continues to build and is installable for the few cases where its

# really needed.

blacklist amd76x_edac

To be able to solve the problem, you must identify the problem : is it a hard or a soft problem ?

Is your DVD player connected with USB (internally) or with pci ? You shoud be able to see it in the output given by either lspci or lsusb in the terminal. If it doesn't appear any more here, there may probably be a hardware problem.

Last thing : since your computer is a laptop, you should be able to remove the DVD drive and insert it in another laptop to test it. This could be a nice start to know if the problem lies in the software or in the hardware (which I personally think it is).

Hope this helps,

Ben

in a console terminal type this :

sudo eject /dev/cdrom2

If it's working then your trouble is due to the fact that, for some reason, the cdrom is detected as second cdrom and you are having a bug.

Do you have various cdrom/dvdrom ? or a usb hard drive ?