ubuntu 10.04 beta 2
I have same problem

Apr 10 17:27:23 quad kernel: [  233.919930] cdrom: This disc doesn't have any tracks I recognize!
Apr 10 17:27:23 quad kernel: [  233.931436] sr 2:0:0:0: [sr0] Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
Apr 10 17:27:23 quad kernel: [  233.931441] sr 2:0:0:0: [sr0] Sense Key : Illegal Request [current] 
Apr 10 17:27:23 quad kernel: [  233.931447] sr 2:0:0:0: [sr0] Add. Sense: Illegal mode for this track
Apr 10 17:27:23 quad kernel: [  233.931454] sr 2:0:0:0: [sr0] CDB: Read(10): 28 00 00 00 00 00 00 00 01 00
Apr 10 17:27:23 quad kernel: [  233.931469] __ratelimit: 82 callbacks suppressed
Apr 10 17:27:23 quad kernel: [  233.933835] sr 2:0:0:0: [sr0] Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
Apr 10 17:27:23 quad kernel: [  233.933839] sr 2:0:0:0: [sr0] Sense Key : Illegal Request [current] 
Apr 10 17:27:23 quad kernel: [  233.933844] sr 2:0:0:0: [sr0] Add. Sense: Illegal mode for this track
Apr 10 17:27:23 quad kernel: [  233.933850] sr 2:0:0:0: [sr0] CDB: Read(10): 28 00 00 00 00 00 00 00 01 00
Apr 10 17:27:23 quad kernel: [  233.936891] sr 2:0:0:0: [sr0] Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
Apr 10 17:27:23 quad kernel: [  233.936896] sr 2:0:0:0: [sr0] Sense Key : Illegal Request [current] 
Apr 10 17:27:23 quad kernel: [  233.936901] sr 2:0:0:0: [sr0] Add. Sense: Illegal mode for this track
Apr 10 17:27:23 quad kernel: [  233.936907] sr 2:0:0:0: [sr0] CDB: Read(10): 28 00 00 00 00 00 00 00 01 00
Apr 10 17:27:23 quad kernel: [  233.938395] sr 2:0:0:0: [sr0] Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
Apr 10 17:27:23 quad kernel: [  233.938399] sr 2:0:0:0: [sr0] Sense Key : Illegal Request [current] 
Apr 10 17:27:23 quad kernel: [  233.938404] sr 2:0:0:0: [sr0] Add. Sense: Illegal mode for this track
Apr 10 17:27:23 quad kernel: [  233.938410] sr 2:0:0:0: [sr0] CDB: Read(10): 28 00 00 00 00 00 00 00 01 00
Apr 10 17:27:23 quad kernel: [  233.940663] sr 2:0:0:0: [sr0] Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
Apr 10 17:27:23 quad kernel: [  233.940668] sr 2:0:0:0: [sr0] Sense Key : Illegal Request [current] 
Apr 10 17:27:23 quad kernel: [  233.940673] sr 2:0:0:0: [sr0] Add. Sense: Illegal mode for this track
Apr 10 17:27:23 quad kernel: [  233.940679] sr 2:0:0:0: [sr0] CDB: Read(10): 28 00 00 00 00 00 00 00 01 00
Apr 10 17:27:23 quad kernel: [  233.942102] sr 2:0:0:0: [sr0] Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
Apr 10 17:27:23 quad kernel: [  233.942107] sr 2:0:0:0: [sr0] Sense Key : Illegal Request [current] 
Apr 10 17:27:23 quad kernel: [  233.942112] sr 2:0:0:0: [sr0] Add. Sense: Illegal mode for this track
Apr 10 17:27:23 quad kernel: [  233.942118] sr 2:0:0:0: [sr0] CDB: Read(10): 28 00 00 00 00 00 00 00 01 00
Apr 10 17:27:23 quad kernel: [  233.943605] sr 2:0:0:0: [sr0] Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
Apr 10 17:27:23 quad kernel: [  233.943610] sr 2:0:0:0: [sr0] Sense Key : Illegal Request [current] 
Apr 10 17:27:23 quad kernel: [  233.943615] sr 2:0:0:0: [sr0] Add. Sense: Illegal mode for this track
Apr 10 17:27:23 quad kernel: [  233.943621] sr 2:0:0:0: [sr0] CDB: Read(10): 28 00 00 00 00 00 00 00 01 00
Apr 10 17:27:23 quad kernel: [  233.945040] sr 2:0:0:0: [sr0] Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
Apr 10 17:27:23 quad kernel: [  233.945045] sr 2:0:0:0: [sr0] Sense Key : Illegal Request [current] 
Apr 10 17:27:23 quad kernel: [  233.945049] sr 2:0:0:0: [sr0] Add. Sense: Illegal mode for this track
Apr 10 17:27:23 quad kernel: [  233.945055] sr 2:0:0:0: [sr0] CDB: Read(10): 28 00 00 00 00 00 00 00 01 00
Apr 10 17:27:23 quad kernel: [  233.946445] sr 2:0:0:0: [sr0] Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
Apr 10 17:27:23 quad kernel: [  233.946449] sr 2:0:0:0: [sr0] Sense Key : Illegal Request [current] 
Apr 10 17:27:23 quad kernel: [  233.946453] sr 2:0:0:0: [sr0] Add. Sense: Illegal mode for this track
Apr 10 17:27:23 quad kernel: [  233.946459] sr 2:0:0:0: [sr0] CDB: Read(10): 28 00 00 00 00 00 00 00 01 00
Apr 10 17:27:23 quad kernel: [  233.947984] sr 2:0:0:0: [sr0] Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE