Fwd: Odd problems with cdrom not finding media

[Alex Hsia <xanderhsia@gmail.com>]

Greets everyone,

 I am running into an odd problem with a NEC-3520AW (firmware 3.06)
attached to a Promise Ultra TX2 100 pci card (pdc20268 kernel driver).
DVD's and DVD-R's seem to be recognized fine when inserted; however
CDs (pressed, cdr, cdrw, audio) are not. I always end up with a
message to effect of "No media found" when trying to use those.

 I googled for quite a bit, but wasn't able to narrow the problem
down. I don't know if it is the promise driver or something in the
ide-cd module. A fair bit of my log looks like the following after
trying various mounting operations.

 cdrom: open failed.
 cdrom_pc_intr, write: dev hdf: flags = REQ_STARTED REQ_PC REQ_QUIET
 sector 0, nr/cnr 0/0
 bio 00000000, biotail 00000000, buffer 00000000, data 00000000, len 0
 cdb: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 hdf: cdrom_pc_intr: The drive appears confused (ireason = 0xd0)
 cdrom: This disc doesn't have any tracks I recognize!

 I am running vanilla-2.6.14-rc2 no enhancements. The drive itself
worked fine in another computer. Any ideas on where to go hunting?
 I can provide lots of info if needed, just give me a idea of what.

 Thanks,

 -A

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