DVD-playing, ide-cd vs scsi-cd drivers

Hi,

I have an FC6 machine with a Pioneer DVD-RW and
I occasionally watch DVDs on it. (Xine+libdvdcss
from Livna works just fine.) I compiled 2.6.22-rc7-git5
before with ide-cd but now I changed the driver to
pata_amd to see it works before I upgrade to FC7.
Now DVD-playing doesn't work, I got this in the log
when I tried to play a DVD in Xine.

UDF-fs: Partition marked readonly; forcing readonly mount

UDF-fs INFO UDF 0.9.8.1 (2004/29/09) Mounting volume 'TW10Y', timestamp 2004/12/16 14:30 (1078)

SELinux: initialized (dev sr0, type udf), uses genfs_contexts
sr 6:0:0:0: [sr0] Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE,SUGGEST_OK
sr 6:0:0:0: [sr0] Sense Key : Hardware Error [current]

sr 6:0:0:0: [sr0] Add. Sense: Logical unit communication CRC error (Ultra-DMA/32)

end_request: I/O error, dev sr0, sector 1476
Buffer I/O error on device sr0, logical block 369
Buffer I/O error on device sr0, logical block 370
Buffer I/O error on device sr0, logical block 371
Buffer I/O error on device sr0, logical block 372
Buffer I/O error on device sr0, logical block 373
Buffer I/O error on device sr0, logical block 374
Buffer I/O error on device sr0, logical block 375
Buffer I/O error on device sr0, logical block 376
Buffer I/O error on device sr0, logical block 377
Buffer I/O error on device sr0, logical block 378
sr 6:0:0:0: [sr0] Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE,SUGGEST_OK
sr 6:0:0:0: [sr0] Sense Key : Hardware Error [current]

sr 6:0:0:0: [sr0] Add. Sense: Logical unit communication CRC error (Ultra-DMA/32)

end_request: I/O error, dev sr0, sector 9126328
printk: 5 messages suppressed.
Buffer I/O error on device sr0, logical block 2281582
Buffer I/O error on device sr0, logical block 2281583
Buffer I/O error on device sr0, logical block 2281584
Buffer I/O error on device sr0, logical block 2281585
Buffer I/O error on device sr0, logical block 2281586
Buffer I/O error on device sr0, logical block 2281587
Buffer I/O error on device sr0, logical block 2281588
Buffer I/O error on device sr0, logical block 2281589
Buffer I/O error on device sr0, logical block 2281590
Buffer I/O error on device sr0, logical block 2281591
sr 6:0:0:0: [sr0] Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE,SUGGEST_OK
sr 6:0:0:0: [sr0] Sense Key : Hardware Error [current]

sr 6:0:0:0: [sr0] Add. Sense: Logical unit communication CRC error (Ultra-DMA/32)

end_request: I/O error, dev sr0, sector 1464
sr 6:0:0:0: [sr0] Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE,SUGGEST_OK
sr 6:0:0:0: [sr0] Sense Key : Hardware Error [current]

sr 6:0:0:0: [sr0] Add. Sense: Logical unit communication CRC error (Ultra-DMA/32)

end_request: I/O error, dev sr0, sector 1820
sr 6:0:0:0: [sr0] Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE,SUGGEST_OK
sr 6:0:0:0: [sr0] Sense Key : Hardware Error [current]

sr 6:0:0:0: [sr0] Add. Sense: Logical unit communication CRC error (Ultra-DMA/32)

end_request: I/O error, dev sr0, sector 64420
sr 6:0:0:0: [sr0] Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE,SUGGEST_OK
sr 6:0:0:0: [sr0] Sense Key : Hardware Error [current]

sr 6:0:0:0: [sr0] Add. Sense: Logical unit communication CRC error (Ultra-DMA/32)

end_request: I/O error, dev sr0, sector 2163840
sr 6:0:0:0: [sr0] Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE,SUGGEST_OK
sr 6:0:0:0: [sr0] Sense Key : Hardware Error [current]

sr 6:0:0:0: [sr0] Add. Sense: Logical unit communication CRC error (Ultra-DMA/32)

end_request: I/O error, dev sr0, sector 2163840
sr 6:0:0:0: [sr0] Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE,SUGGEST_OK
sr 6:0:0:0: [sr0] Sense Key : Hardware Error [current]

sr 6:0:0:0: [sr0] Add. Sense: Logical unit communication CRC error (Ultra-DMA/32)

end_request: I/O error, dev sr0, sector 4258944
sr 6:0:0:0: [sr0] Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE,SUGGEST_OK
sr 6:0:0:0: [sr0] Sense Key : Hardware Error [current]

sr 6:0:0:0: [sr0] Add. Sense: Logical unit communication CRC error (Ultra-DMA/32)

end_request: I/O error, dev sr0, sector 6356860
sr 6:0:0:0: [sr0] Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE,SUGGEST_OK
sr 6:0:0:0: [sr0] Sense Key : Hardware Error [current]

sr 6:0:0:0: [sr0] Add. Sense: Logical unit communication CRC error (Ultra-DMA/32)

end_request: I/O error, dev sr0, sector 8453752
sr 6:0:0:0: [sr0] Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE,SUGGEST_OK
sr 6:0:0:0: [sr0] Sense Key : Hardware Error [current]

sr 6:0:0:0: [sr0] Add. Sense: Logical unit communication CRC error (Ultra-DMA/32)

end_request: I/O error, dev sr0, sector 9127460

I changed the driver back to old IDE and DVD-playing works again
so it's not a hardware error. Is there something I forgot to compile in
or is it a handicap in the SCSI CD drivers?

Best regards,
Zoltán Böszörményi


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