🚀 go-pugleaf

torgo@cs.colostate.edu wrote:
> 
> Hello all,
> 
> I am having problems with my Chinon 535 (Revision Q20) CD-Rom drive.
> Whenever I boot up without a CD-Rom in the drive, Linux will boot up
> just fine, but the CD-Rom drive will never work.  If I boot up with a CD
> in the drive, then Linux will get "stuck" while reading the drive.  It says
> that it detected a disk change.  It will eventually time-out and reset the
> SCSI bus.  After this, the root directory of the cd-rom is visible, but I
> cannot touch any of the files or subdirectories (it can't read the files in
> the root directory and changing into subdirectories yields empty directories).
> 
> I noticed in the scsi.c file that an earlier version of this CD-Rom drive was
> blacklisted for hanging when Linux was probing LUNs other than 0.  I
> modified this file to blacklist this CD-Rom drive (Model Q20 instead of Q16)
> and re-compiled.  I even used make config to tell it not to probe for LUNs.
> However, I am still having these problems.
> 
> Does anyone have any ideas on other things to try?  (Besides getting a new
> CD-Rom player).  I have an Adaptec AHA1522A-Fast SCSI-2 controller.
> I am using Linux ver. 1.2.13.

I don't have any experience with Chinon drives, but I'd suggest trying
one of the newer kernels. Don't go hog-wild and get the latest, try one
of the inbetweens, like 1.3.43. I've been running that one (amongst others)
for awhile now without problem. The process related stuff that is broken
in the newer kernels works fine in 1.3.43. 

PS: I'm not touting 1.3.43 as *the* best, I'm just relating my experience
with it.

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