I am seeing this bug too on both AMD64 and Alpha architectures.
Sometimes DVD plays up with error messages (similar to those given by
original reporter; see below) and doesn't seem to recover until a
reboot. When the errors start typically I can get the disc mounted
(unlike the original reporter) but can't read much from it. My hardware
is as follows:
AMD64 machine running Debian testing:
kernel: 2.6.32-3-amd64 (Debian kernel)
SATA controller: 00:09.0 IDE interface: nVidia Corporation MCP78S
[GeForce 8200] SATA Controller (non-AHCI mode) (rev a2)
DVD drive: Lite-On ATAPI iHAS120 6 7L0F
I tried an old unstable installation (it hasn't been upgraded for 2 or 3
months) that is still hanging around on another partition. It has the
2.6.32-trunk-amd64 Debian kernel and it seemed to work okay, but I
really need to test it further to be really sure as I have since
discovered that the disc errors may take a few disc changes before they
start to appear.
Alpha running Debian unstable:
kernel: 2.6.34 (compiled from www.kernel.org)
SATA controller: 0001:03:09.0 RAID bus controller: Silicon Image, Inc.
SiI 3114 [SATALink/SATARaid] Serial ATA Controller (rev 02)
DVD drive: Lite-On ATAPI DVD A DH20A3S 9P54
On the Alpha I took it back to a 2.6.32.7 kernel and still could get the
disc errors to appear. To take the kernel back any earlier I will
probably have to create a patched kernel (udev didn't create the
necessary system disk device nodes when I tried an even earlier kernel
-- missing system calls maybe?).
This Alpha also has an old Compaq IDE CD-ROM drive which I use for
booting. It has also taken to spitting out errors since about 2.6.32
kernel or maybe 2.6.31, but I have really never cared since I only use
it for booting and that is working fine.
Example of the DVD errors I am getting on the Alpha:
[240094.915157] UDF-fs: Partition marked readonly; forcing readonly mount
[240094.960079] UDF-fs INFO UDF: Mounting volume 'SPARTACUS', timestamp
2000/11/02 17:15 (1000)
[240099.128045] sr 2:0:0:0: [sr0] Result: hostbyte=DID_OK
driverbyte=DRIVER_SENSE
[240099.128045] sr 2:0:0:0: [sr0] Sense Key : Illegal Request [current]
[240099.128045] sr 2:0:0:0: [sr0] Add. Sense: Read of scrambled sector
without authentication
[240099.128045] sr 2:0:0:0: [sr0] CDB: Read(10): 28 00 00 00 26 f4 00 00
40 00
[240099.128045] end_request: I/O error, dev sr0, sector 39888
[240099.128045] quiet_error: 97 callbacks suppressed
[240099.128045] Buffer I/O error on device sr0, logical block 9972
[240099.128045] Buffer I/O error on device sr0, logical block 9973
[240099.128045] Buffer I/O error on device sr0, logical block 9974
[240099.128045] Buffer I/O error on device sr0, logical block 9975
[240099.128045] Buffer I/O error on device sr0, logical block 9976
[240099.128045] Buffer I/O error on device sr0, logical block 9977
[240099.129022] Buffer I/O error on device sr0, logical block 9978
[240099.129022] Buffer I/O error on device sr0, logical block 9979
[240099.129022] Buffer I/O error on device sr0, logical block 9980
[240099.129022] Buffer I/O error on device sr0, logical block 9981
[240099.160272] sr 2:0:0:0: [sr0] Result: hostbyte=DID_OK
driverbyte=DRIVER_SENSE
[240099.160272] sr 2:0:0:0: [sr0] Sense Key : Illegal Request [current]
[240099.160272] sr 2:0:0:0: [sr0] Add. Sense: Read of scrambled sector
without authentication
[240099.160272] sr 2:0:0:0: [sr0] CDB: Read(10): 28 00 00 00 27 34 00 00
20 00
[240099.160272] end_request: I/O error, dev sr0, sector 40144
Cheers
Michael.
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