我在 Toshiba Satellite Pro A120 上运行 Ubuntu 12.10，并且我的内置 DVD 驱动器无法打开我尝试在其上播放的任何 cd/dvd/dvd rw。驱动器似乎已安装并被识别：
sudo lshw 的输出：...
<$> *-cdrom
description: DVD-RAM writer
product: DVD-RAM UJ-841S
vendor: MATSHITA
physical id: 1
bus info: scsi@1:0.0.0
logical name: /dev/cdrom
logical name: /dev/cdrw
logical name: /dev/dvd
logical name: /dev/dvdrw
logical name: /dev/sr0
version: 1.40
capabilities: removable audio cd-r cd-rw dvd dvd-r dvd-ram
configuration: ansiversion=5 status=ready
*-medium
physical id: 0
logical name: /dev/cdrom
<$>
磁盘似乎已启动，但 DVD 驱动器 LED 呈琥珀色常亮，挂起。输出
<$> jun@jun-Satellite-Pro-A120:~$ dmesg | grep "sr0"
[679396.184901] sr 1:0:0:0: [sr0] Unhandled sense code
[679396.184910] sr 1:0:0:0: [sr0] Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
[679396.184920] sr 1:0:0:0: [sr0] Sense Key : Hardware Error [current]
[679396.184931] sr 1:0:0:0: [sr0] Add. Sense: Id CRC or ECC error
[679396.184942] sr 1:0:0:0: [sr0] CDB: Read(10): 28 00 00 00 00 00 00 00 08 00
[679396.184965] end_request: I/O error, dev sr0, sector 0
[679396.184975] Buffer I/O error on device sr0, logical block 0
[679396.184984] Buffer I/O error on device sr0, logical block 1
[679396.184990] Buffer I/O error on device sr0, logical block 2
[679396.184996] Buffer I/O error on device sr0, logical block 3
[679396.185002] Buffer I/O error on device sr0, logical block 4
[679396.185008] Buffer I/O error on device sr0, logical block 5
[679396.185014] Buffer I/O error on device sr0, logical block 6
[679396.185020] Buffer I/O error on device sr0, logical block 7
[679396.185031] Buffer I/O error on device sr0, logical block 8
[679396.185038] Buffer I/O error on device sr0, logical block 9
[679396.185070] sr 1:0:0:0: [sr0] unaligned transfer
[679396.185108] sr 1:0:0:0: [sr0] unaligned transfer
<$>
有人能帮助我解决这个问题吗？厌倦了带着外置 DVD 驱动器到处走动。
谢谢