Unusual CD-ROM problem from the Installfest

[david at kramer.ne.mediaone.net (David Kramer)]

Derek Martin wrote:
> 
> Today, Bill Horne gleaned this insight:
> 
> > It has a generic sound card, with a Sony CDU33A-01 CD-ROM
> > plugged into the card.  This is a proprietary interface; Win95
> > shows it as such, and it's usable with Win95.
> 
> So it will have a device name which is associated with that proprietary
> interface.  I'm not familiar with those devices so I can't tell you what
> it might be.  I suggest reading the kernel configuration help files for
> the non-scsi, non-atapi CD drives (i.e. from the 'make xconfig' command).
> That may give you some insight.
> 
> > dmesg says:
> >
> > ISP16: configuration cdrom interface, version 0.6
> > ISP16: cdrom interface (with OPTi 82C928 chip) detected.
> > ISP16: cdrom interface set up with io base 0x340, irq 0, dma 0,
> > type Sanyo
> >
> > I've tried specifying port and IQ at the LILO prompt, without
> > any change:  every mount command gives a message saying the
> > kernel does not recognize /dev/cdrom as a block device.
> 

I found /usr/src/linux/Documentation/cdrom/cdu31a and
/usr/src/linux/drivers/cdrom/cdu31a.(c|h)

The two important pieces of information I picked up form a cursory scan
of these files is that (1) Newer versions of the driver can work in
interrupt-driven mode, but it is disabled by default, so it normally
works in polled mode, eating up bus bandwidth and CPU cycles. (2) The
driver really can't autodetect the controller very well, so you may be
seeing false positives.  See these files for more info.

I did not see a reference to a device name.
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