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Old 01-14-2009, 03:07 AM
Matthew Braun
 
Default Cannot see SCSI CD changer in 2.6.24-14-generic or newer kernels

Greetings!

I have a 200-disc SCSI-attached CD changer that I'd like to make use of, and
I'm currently running 8.10 (upgraded from Gutsy). However, ever since
upgrading from kernel 2.6.22-14-generic to kernel 2.6.24-14-generic (and all
subsequent kernels) the boot process hangs and drops out to
initramfs/busybox while the CD changer initializes itself (i.e. it checks
all 200 element slots for discs). After around 7 minutes, I get a message
that ch0 has finished and that a SCSI disk is attached. However, I'm stuck
in initramfs.

I increased the root timeout value to 10 minutes and the system will boot,
but what then happens is I get numerous error messages from within Gnome
that I can't mount the audio disc (which is is in the changer for testing).

I'm at a loss as to how best to diagnose and resolve the situation. Any help
or suggestions would be very much appreciated!

The (truncated) dmesg output from the running 2.6.22-14-generic boot is:

<SNIP>
[ 118.836191] scsi2 : Adaptec AIC7XXX EISA/VLB/PCI SCSI HBA DRIVER, Rev 7.0
[ 118.836194] <Adaptec 2940 Ultra SCSI adapter>
[ 118.836196] aic7880: Ultra Wide Channel A, SCSI Id=7, 16/253 SCBs
[ 118.836197]
[ 118.836869] ACPI: PCI Interrupt 0000:02:0b.0[A] -> GSI 19 (level, low) ->
IRQ 16
[ 118.889932] ohci1394: fw-host0: OHCI-1394 1.0 (PCI): IRQ=[16]
MMIO=[ec184000-ec1847ff] Max Packet=[2048] IR/IT contexts=[4/8]
[ 118.898517] shpchp: Standard Hot Plug PCI Controller Driver version: 0.4
[ 118.898541] piix4_smbus 0000:00:14.0: Found 0000:00:14.0 device
[ 118.898715] agpgart: Detected Ati IGP9100/M chipset
[ 118.905832] agpgart: AGP aperture is 64M @ 0xe4000000
[ 118.917611] ACPI: PCI Interrupt 0000:00:14.5[b] -> GSI 17 (level, low) ->
IRQ 18
[ 119.011967] input: PS/2 Generic Mouse as /class/input/input2
[ 119.428211] scsi 2:0:2:0: CD-ROM PLEXTOR CD-ROM PX-32CS
1.01 PQ: 0 ANSI: 2
[ 119.428238] target2:0:2: Beginning Domain Validation
[ 119.430667] target2:0:2: FAST-20 SCSI 20.0 MB/s ST (50 ns, offset 15)
[ 119.431991] target2:0:2: Domain Validation skipping write tests
[ 119.431996] target2:0:2: Ending Domain Validation
[ 119.438401] scsi 2:0:3:0: CD-ROM PLEXTOR CD-ROM PX-32CS
1.01 PQ: 0 ANSI: 2
[ 119.438424] target2:0:3: Beginning Domain Validation
[ 119.440872] target2:0:3: FAST-20 SCSI 20.0 MB/s ST (50 ns, offset 15)
[ 119.442135] target2:0:3: Domain Validation skipping write tests
[ 119.442140] target2:0:3: Ending Domain Validation
[ 119.448520] scsi 2:0:4:0: CD-ROM PLEXTOR CD-ROM PX-32CS
1.01 PQ: 0 ANSI: 2
[ 119.448545] target2:0:4: Beginning Domain Validation
[ 119.450979] target2:0:4: FAST-20 SCSI 20.0 MB/s ST (50 ns, offset 15)
[ 119.452294] target2:0:4: Domain Validation skipping write tests
[ 119.452299] target2:0:4: Ending Domain Validation
[ 119.458705] scsi 2:0:5:0: CD-ROM PLEXTOR CD-ROM PX-32CS
1.01 PQ: 0 ANSI: 2
[ 119.458731] target2:0:5: Beginning Domain Validation
[ 119.461149] target2:0:5: FAST-20 SCSI 20.0 MB/s ST (50 ns, offset 15)
[ 119.462456] target2:0:5: Domain Validation skipping write tests
[ 119.462460] target2:0:5: Ending Domain Validation
[ 119.470054] scsi 2:0:6:0: Medium Changer JVC CD-CHG MC-1200
1.02 PQ: 0 ANSI: 2
[ 119.470080] target2:0:6: Beginning Domain Validation
[ 119.501913] target2:0:6: Ending Domain Validation
[ 119.992466] lp: driver loaded but no devices found
[ 120.165728] ieee1394: Host added: ID:BUS[0-00:1023]
GUID[00301bb100009a6d]
[ 120.634783] Adding 2931820k swap on /dev/hdc5. Priority:-1 extents:1
across:2931820k
[ 121.346340] EXT3 FS on hdc1, internal journal
[ 121.667091] sr0: scsi-1 drive
[ 121.667513] sr 2:0:2:0: Attached scsi CD-ROM sr0
[ 121.675645] sr1: scsi-1 drive
[ 121.676054] sr 2:0:3:0: Attached scsi CD-ROM sr1
[ 121.694454] SCSI Media Changer driver v0.25
[ 121.695202] sr2: scsi-1 drive
[ 121.695677] sr 2:0:4:0: Attached scsi CD-ROM sr2
[ 121.700406] sr3: scsi-1 drive
[ 121.700828] sr 2:0:5:0: Attached scsi CD-ROM sr3
[ 121.716046] ch0: type #1 (mt): 0x2000+1 [medium transport]
[ 121.716051] ch0: type #2 (st): 0x1+200 [storage]
[ 121.716054] ch0: type #3 (ie): 0x4000+1 [import/export]
[ 121.716056] ch0: type #4 (dt): 0x3001+4 [data transfer]
[ 121.725497] ch0: dt 0x3001: ID 5, LUN 0, name: PLEXTOR CD-ROM PX-32CS
1.01
[ 121.737404] sr 2:0:2:0: Attached scsi generic sg0 type 5
[ 121.737781] sr 2:0:3:0: Attached scsi generic sg1 type 5
[ 121.738165] sr 2:0:4:0: Attached scsi generic sg2 type 5
[ 121.738604] sr 2:0:5:0: Attached scsi generic sg3 type 5
[ 121.738977] ch 2:0:6:0: Attached scsi generic sg4 type 8
[ 121.762428] ch0: dt 0x3002: ID 4, LUN 0, name: PLEXTOR CD-ROM PX-32CS
1.01
[ 121.782824] ch0: dt 0x3003: ID 3, LUN 0, name: PLEXTOR CD-ROM PX-32CS
1.01
[ 121.842549] ch0: dt 0x3004: ID 2, LUN 0, name: PLEXTOR CD-ROM PX-32CS
1.01
[ 121.842560] ch0: INITIALIZE ELEMENT STATUS, may take some time ...
[ 122.887340] audit(1231905243.746:3): type=1505 operation="profile_load"
info="unsupported interface version" pid=4078
[ 123.142881] audit(1231905244.246:4): type=1505 operation="profile_load"
info="unsupported interface version" pid=4083
[ 123.219799] audit(1231905244.246:5): type=1505 operation="profile_load"
info="unsupported interface version" pid=4087

<SNIP>

[ 169.092631] (scsi2:A:5:0): No or incomplete CDB sent to device.
[ 169.092755] scsi2: Issued Channel A Bus Reset. 2 SCBs aborted
[ 169.093111] ch0: ... finished
[ 169.094174] ch 2:0:6:0: Attached scsi changer ch0
[ 169.446036] target2:0:5: FAST-20 SCSI 20.0 MB/s ST (50 ns, offset 15)
[ 169.459827] sr3: CDROM not ready yet.
[ 170.598339] target2:0:2: FAST-20 SCSI 20.0 MB/s ST (50 ns, offset 15)
[ 170.603793] target2:0:3: FAST-20 SCSI 20.0 MB/s ST (50 ns, offset 15)
[ 170.609267] target2:0:4: FAST-20 SCSI 20.0 MB/s ST (50 ns, offset 15)
[ 171.465687] sr3: CDROM not ready yet.
[ 173.591760] sr3: CDROM not ready yet.
[ 175.598051] sr3: CDROM not ready yet.
[ 177.645293] sr3: CDROM not ready yet.
[ 179.649795] sr3: CDROM not ready yet.





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