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SubjectRe: Yamaha CRW4416S problem playing audio CD's
Hi everyone,
Okay - I just tried 2.3.18ac4 + Jens' patch and things still don't
work. OTOH, the kernel actually doesn't try as hard to make the SCSI
drive work, so I don't get into a dead loop. Good job with the SCSI
cleanups, Alan.

Anyway, I was able to get the system to actually give some verbose error
messages about what's going on under kernel 2.2.13p7. It does look like
a SCSI problem, and might be a problem with the drive, or how the drive
is handling things. Could someone with appropriate SCSI clue take a
look at the errors below? It probably is a problem with the hardware,
but I'd like to be able to tell the people at Yamaha that their drive
doesn't properly support X SCSI commands when reading the CD volume,
rather than telling them that it doesn't work with linux.

Thanks very much,

Greg Zornetzer
gazornetzer@students.wisc.edu

Sep 14 18:50:20 athena kernel: Detected scsi CD-ROM sr0 at scsi0,
channel 0, id 3, lun 0
Sep 14 18:50:20 athena kernel: sr0: scsi3-mmc drive: 16x/16x writer
cd/rw xa/form2 cdda tray
Sep 14 18:50:20 athena kernel: cdrom: entering register_cdrom
Sep 14 18:50:20 athena kernel: Uniform CDROM driver Revision: 2.56
Sep 14 18:50:20 athena kernel: cdrom: drive "/dev/sr0" registered
Sep 14 18:50:20 athena kernel: cdrom: entering cdrom_open
Sep 14 18:50:20 athena kernel: cdrom: Use count for "/dev/sr0" now 1
Sep 14 18:50:20 athena kernel: cdrom: doing audio ioctl
(start/stop/pause/resume)
Sep 14 18:50:20 athena kernel: cdrom: entering check_for_audio_disc
Sep 14 18:50:21 athena kernel: cdrom: entering CDROM_CHANGER_NSLOTS
Sep 14 18:50:22 athena kernel: cdrom: entering CDROMVOLREAD

Sep 14 18:50:30 athena kernel: sr0: CDROM (ioctl) error, command: Read
sub-channel 02 40 01 00 00 00 00 10 00
Sep 14 18:50:30 athena kernel: [valid=0] Info fld=0x0, Current sr00:00:
sense key Hardware Error
Sep 14 18:50:30 athena kernel: Additional sense indicates Track
following error

last 3 lines repeated a couple times

Sep 14 18:50:43 athena kernel: (scsi0:0:3:0) Performing Domain
validation.
Sep 14 18:50:43 athena kernel: (scsi0:0:3:0) reducing SCSI transfer
speed due to Domain validation failure.

a couple more fo the sr0 cdrom ioctl errors, same command


Sep 14 18:51:20 athena kernel: (scsi0:0:3:0) Performing Domain
validation.
Sep 14 18:51:20 athena kernel: (scsi0:0:3:0) Successfully completed
Domain validation.

and so on.


Finally, timeouts started occurring, and the SCSI bus was reset. That
actually by-passed the problems, so it seems that whatever command is
failing isn't totally necessary to play cd audio, but the SCSI cdrom
driver has issues when it doesn't complete properly.

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