Disc drive will not read DVDs or CDs

Have you done anything recently that might have caused this? Show us the output of `ls /dev` because there might be something missing. Also, is it just having trouble playing movies and sound, or cannot it read data CDs either?

First off, THANK YOU FOR RESPONDING!!!! :D

All I have done is just re-installed Ubuntu.

DEV Output:

agpgart
audio
block
bus
cdrom
cdrw
char
console
core
cpu_dma_latency
disk
dri
dsp
dvd
dvdrw
ecryptfs
fd
full
fuse
hidraw0
hpet
initctl
input
kmem
kmsg
log
loop0
loop1
loop2
loop3
loop4
loop5
loop6
loop7
mapper
mem
mixer
net
network_latency
network_throughput
null
oldmem
pktcdvd
port
ppp
psaux
ptmx
pts
ram0
ram1
ram10
ram11
ram12
ram13
ram14
ram15
ram2
ram3
ram4
ram5
ram6
ram7
ram8
ram9
random
rtc
rtc0
scd0
sda
sda1
sda2
sda3
sda5
sdb
sdc
sdc1
sequencer
sequencer2
sg0
sg1
sg2
sg3
shm
snapshot
snd
sndstat
sr0
stderr
stdin
stdout
tty
tty0
tty1
tty10
tty11
tty12
tty13
tty14
tty15
tty16
tty17
tty18
tty19
tty2
tty20
tty21
tty22
tty23
tty24
tty25
tty26
tty27
tty28
tty29
tty3
tty30
tty31
tty32
tty33
tty34
tty35
tty36
tty37
tty38
tty39
tty4
tty40
tty41
tty42
tty43
tty44
tty45
tty46
tty47
tty48
tty49
tty5
tty50
tty51
tty52
tty53
tty54
tty55
tty56
tty57
tty58
tty59
tty6
tty60
tty61
tty62
tty63
tty7
tty8
tty9
ttyS0
ttyS1
ttyS2
ttyS3
urandom
usbdev1.1_ep00
usbdev1.1_ep81
usbdev1.2_ep00
usbdev1.2_ep01
usbdev1.2_ep82
usbdev2.1_ep00
usbdev2.1_ep81
usbdev2.3_ep00
usbdev2.3_ep02
usbdev2.3_ep81
usbdev3.1_ep00
usbdev3.1_ep81
usbdev4.1_ep00
usbdev4.1_ep81
usbdev5.1_ep00
usbdev5.1_ep81
usbdev5.2_ep00
usbdev5.2_ep81
usbdev6.1_ep00
usbdev6.1_ep81
usbdev7.1_ep00
usbdev7.1_ep81
usbdev8.1_ep00
usbdev8.1_ep81
usbmon0
usbmon1
usbmon2
usbmon3
usbmon4
usbmon5
usbmon6
usbmon7
usbmon8
vcs
vcs1
vcs2
vcs3
vcs4
vcs5
vcs6
vcs7
vcs8
vcsa
vcsa1
vcsa2
vcsa3
vcsa4
vcsa5
vcsa6
vcsa7
vcsa8
watchdog
xconsole
zero

Yes, it has trouble reading both

Play mp3 and dvd and other stuffs under Ubuntu using Medibuntu

First please install https://help.ubuntu.com/community/RestrictedFormats

You need to have extra repositories enabled..

Please first enable the universe and multiverse repository:

Open System → Administration → Software sources → [ Tab Ubuntu software ]

enable "Community-maintained Open Source software ( universe )"
enable "Proprietary drivers for devices ( restricted )"
enable "Software restrictecd by copyright or legal issue ( multiverse )"

Close and confirm the repository reload.

Then open a Terminal from the menu Applications→Accessories→Terminal

Tip: right click with mouse on the terminal title caption and select the item "Always on Top" doing this you will force the terminal window to stay on top of the other windows and you will find very easy to copy single row from this web page into the terminal...
Something more about using the terminal https://help.ubuntu.com/community/UsingTheTerminal

Then type or better copy and paste a row a time then press enter:
(Tip: select the single row to copy then right click into the terminal and to quick paste click with middle button of mouse )

and type or better copy and paste:

sudo aptitude install vlc smplayer mplayer

To get better dvd playback and optional packages here the medibuntu available software list http://packages.medibuntu.org/
you need to add the medibuntu http://www.medibuntu.org/ repository to your /etc/apt/sources.list file:
( here the medibuntu howto https://help.ubuntu.com/community/Medibuntu but see below )

In short please open a Terminal from the menu Applications → Accessories → Terminal and type or copy and paste:

sudo wget http://www.medibuntu.org/sources.list.d/`lsb_release -cs`.list --output-document=/etc/apt/sources.list.d/medibuntu.list; sudo apt-get -q update; sudo apt-get --yes -q --allow-unauthenticated install medibuntu-keyring; sudo apt-get -q update

-- give your user password when requested, you don't see nothing when you type it, then press enter

Now to install, type:

sudo apt-get update
sudo apt-get install ubuntu-restricted-extras libxine1-ffmpeg
sudo aptitude install libdvdread3 libdvdnav4 libdvdcss2 regionset gnome-mplayer
sudo aptitude install non-free-codecs w32codecs
sudo aptitude install gstreamer0.10-pitfdll gstreamer0.10-plugins-good
sudo aptitude install gstreamer0.10-plugins-ugly gstreamer0.10-plugins-ugly-multiverse
sudo /usr/share/doc/libdvdread4/install-css.sh

give your user password when requested, you don't see nothing when you type it, then press enter.

You can also install other Medibuntu repository provided optional software http://packages.medibuntu.org/ :

Also optionally you can also install googleearth ans skype:
sudo apt-get install googleearth
sudo apt-get install acroread

Hope this helps