Comment 112 for bug 405544

Hi
I'm using Ubuntu 10.04 (Lucid Lynx).
I have a "HL-DT-ST GT10N" DVD+-RW (Dell Vostro 1520 embeded DVD drive) with "A105" firmware.
It plays CD. It plays some of DVDs but it has the same problem mentioned above with lots of DVDs!
It gives:
Oct 13 23:08:51 ariyan-laptop pulseaudio[1759]: ratelimit.c: 87 events suppressed
Oct 13 23:09:01 ariyan-laptop CRON[11847]: (root) CMD ( [ -x /usr/lib/php5/maxlifetime ] && [ -d /var/lib/php5 ] && find /var/lib/php5/ -type f -cmin +$(/usr/lib/php5/maxlifetime) -print0 | xargs -n 200 -r -0 rm)
Oct 13 23:09:51 ariyan-laptop pulseaudio[1759]: ratelimit.c: 84 events suppressed
Oct 13 23:11:56 ariyan-laptop kernel: [39468.382150] sr 1:0:0:0: [sr0] Unhandled sense code
Oct 13 23:11:56 ariyan-laptop kernel: [39468.382155] sr 1:0:0:0: [sr0] Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
Oct 13 23:11:56 ariyan-laptop kernel: [39468.382161] sr 1:0:0:0: [sr0] Sense Key : Medium Error [current]
Oct 13 23:11:56 ariyan-laptop kernel: [39468.382168] sr 1:0:0:0: [sr0] Add. Sense: Cannot read medium - unknown format
Oct 13 23:11:56 ariyan-laptop kernel: [39468.382177] sr 1:0:0:0: [sr0] CDB: Read(10): 28 00 00 00 00 00 00 00 02 00
Oct 13 23:11:56 ariyan-laptop kernel: [39468.382193] end_request: I/O error, dev sr0, sector 0
Oct 13 23:11:56 ariyan-laptop kernel: [39468.382199] __ratelimit: 129 callbacks suppressed
Oct 13 23:11:56 ariyan-laptop kernel: [39468.382203] Buffer I/O error on device sr0, logical block 0

How can I fix this?
Thanks