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I have the exact same problem as Thomas, above.
A few minutes after booting, the CD/DVD drive disappears, never to return, with the exact same type of errors:
ul 2 11:53:28 cymbaline-ubu kernel: [ 79.202004] sr 0:0:0:0: [sr0] Result: hostbyte=DID_OK driverbyte=
Jul 2 11:53:28 cymbaline-ubu kernel: [ 79.202008] sr 0:0:0:0: [sr0] Sense Key : Illegal Request [current]
Jul 2 11:53:28 cymbaline-ubu kernel: [ 79.202011] sr 0:0:0:0: [sr0] Add. Sense: Illegal mode for this track
Jul 2 11:53:28 cymbaline-ubu kernel: [ 79.202015] sr 0:0:0:0: [sr0] CDB: Read(10): 28 00 00 00 00 00 00 00 02 00
Jul 2 11:53:28 cymbaline-ubu kernel: [ 79.202021] end_request: I/O error, dev sr0, sector 0
Jul 2 11:53:28 cymbaline-ubu kernel: [ 79.202024] __ratelimit: 6 callbacks suppressed
Jul 2 11:53:28 cymbaline-ubu kernel: [ 79.202026] Buffer I/O error on device sr0, logical block 0
Jul 2 11:53:28 cymbaline-ubu kernel: [ 79.202028] Buffer I/O error on device sr0, logical block 1
Jul 2 11:53:28 cymbaline-ubu kernel: [ 79.202923] sr 0:0:0:0: [sr0] Result: hostbyte=DID_OK driverbyte=
Jul 2 11:53:28 cymbaline-ubu kernel: [ 79.202926] sr 0:0:0:0: [sr0] Sense Key : Illegal Request [current]
Jul 2 11:53:28 cymbaline-ubu kernel: [ 79.202928] sr 0:0:0:0: [sr0] Add. Sense: Illegal mode for this track
Jul 2 11:53:28 cymbaline-ubu kernel: [ 79.202931] sr 0:0:0:0: [sr0] CDB: Read(10): 28 00 00 00 00 00 00 00 02 00
Jul 2 11:53:28 cymbaline-ubu kernel: [ 79.202937] end_request: I/O error, dev sr0, sector 0
Jul 2 11:53:28 cymbaline-ubu kernel: [ 79.202939] Buffer I/O error on device sr0, logical block 0
Jul 2 11:53:28 cymbaline-ubu kernel: [ 79.202941] Buffer I/O error on device sr0, logical block 1
and ad nausem, then the drive is gone. Aftwards, drive utility still shows it as being there, but refuses to acknowledge that there's media in the drive (see screenshot)
wodim --devices returns nothing
lshw -short doesn't show the CD/DVD burner.
Mine is also a TSSCorp drive.
This started happening after upgrading to 10.04 LTS, no problems on prior 9.0x versions.
I am still relatively new to Ubuntu/linux, and will gladly run any traces/reports if told what to run. Unfortunately I am not in a position to upgrade to the development release.
Thanks.