Unable to mount dvd drive

did you install ubuntu-restricted-extras?
this package will add the dvd, mp3 and other codecs support

i have, but i mean i cannot mount the cd..though it appears in my explorer (the cd) but cannot be access

try these command and copy here: dmesg | tail
P.

sabian@sabian-laptop:~$ dmesg | tail
[ 97.824267] EXT4-fs (sda5): re-mounted. Opts: commit=600
[ 138.348007] EXT4-fs (sda6): re-mounted. Opts: errors=remount-ro,commit=0
[ 138.520117] EXT4-fs (sda5): re-mounted. Opts: commit=0
[ 159.434580] jme 0000:07:00.5: eth0: Link is up at ANed: 100 Mbps, Full-Duplex, MDI.
[ 159.435106] ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready
[ 161.153629] jme 0000:07:00.5: eth0: Link is down.
[ 166.596448] jme 0000:07:00.5: eth0: Link is up at ANed: 100 Mbps, Full-Duplex, MDI.
[ 170.035052] eth0: no IPv6 routers present
[ 171.462322] jme 0000:07:00.5: eth0: Link is down.
[ 179.235453] jme 0000:07:00.5: eth0: Link is up at ANed: 100 Mbps, Full-Duplex, MDI-X.

The dialog box sayed that "location is not mountable"

This command: feedback reporting terminal output:
dmesg|grep DVD

if you have hdparm package also this:
hdparm -i /dev/hdd
(hdd = sr0 for example)

I have same problem as you: I am just trying to solve togheter!
Paolo

Thanks Pliut, here are the result:

dmesg|grep DVD
[ 2.254795] ata2.00: ATAPI: HL-DT-STDVDRAM GT32N, AS01, max UDMA/100
[ 2.278798] scsi 1:0:0:0: CD-ROM HL-DT-ST DVDRAM GT32N AS01 PQ: 0 ANSI: 5

hdparm -i /dev/sr0

/dev/sr0:
 HDIO_DRIVE_CMD(identify) failed: Bad address

 Model=HL-DT-STDVDRAM GT32N, FwRev=AS01, SerialNo=KZCA41D3203
 Config={ Fixed Removeable DTR<=5Mbs DTR>10Mbs nonMagnetic }
 RawCHS=0/0/0, TrkSize=0, SectSize=0, ECCbytes=0
 BuffType=unknown, BuffSize=unknown, MaxMultSect=0
 (maybe): CurCHS=0/0/0, CurSects=0, LBA=yes, LBAsects=0
 IORDY=on/off, tPIO={min:120,w/IORDY:120}, tDMA={min:120,rec:120}
 PIO modes: pio0 pio1 pio2 pio3 pio4
 DMA modes: sdma0 sdma1 sdma2 mdma0 mdma1 mdma2
 UDMA modes: udma0 udma1 udma2 udma3 udma4 *udma5
 AdvancedPM=no
 Drive conforms to: Unspecified: ATA/ATAPI-3,4,5,6,7

 * signifies the current active mode

anyone..please help my problem..

i can read a data cd, but if i inserted a legal audio cd, it won't play

It is really similar to my media/drive problem:
have you tried to tweak audio tools? May be problem is there, also if system message tells of deeper ones.
Please, control soon any mute button in gnome mixer and other audio device.
Thanks,
Paolo

P.s is it writer drive? Can you burn music or audio? My error message says that device can read but cannot write...

I just figured out recently that i can play dvd video well, and i can play my cd audio through VLC player "advanced open file" option. But still can't mount the cd drive through GUI & terminal. I can't play cd audio through rhythmbox and totem too..

I haven't checked burning any cd.
Thx Paolo..

I just figured out recently that i can play dvd video well, and i can play my cd audio through VLC player "advanced open file" option. But still can't mount the cd drive through GUI & terminal. I can't play cd audio through rhythmbox and totem too..

I've check the audio tools and no problem at all.

I haven't checked burning any cd.
Thx Paolo..

Same problem .. I am sorry. Would you like to report a bug?
Paolo

good advise for VLC!
Thanks

How to report the bug?

Your welcome paolo!

How to report the bug?

Reporting Bugs - HowTo - Community Ubuntu Documentation:
https://help.ubuntu.com/community/ReportingBugs
P.