[paranoia] SOLVED: Problems with cdparanoia

[David Balazic]

I think most of what is written below is wrong, except the CD
autorun issue. Are you using KDE or GNOME ?
If GNOME, try to uninstall the 'magicdev' package.
Reboot after that , just in case.

About the kernel options, I have a stock redhat 8.0 kernel,
with all ( most ) SCSI options turned on and have no problem
with IDE/SCSI emulation. True, I only tried cdrecord for
burning CDs and did not try  cdparanoia.

Regards,
david

Kim Lux wrote:
> 
> Hi people
> 
> Disclaimer: I'm a linux newbie.  Some of this may be incorrect.
> 
> I spent a good day troubleshooting cdparanoia crashing my RH8 linux
> install.  I traced the problem to a conflict between two kernel options
> involving SCSI operation of an IDE/ATAPI CDROM drive.
> 
> Related posts: "What is the difference between /dev/sg0, /dev/scd0..."
> and
> "cdparanoia crashes linx, hdd loses interrupt, can't kill process"
> These
> posts were made to linux.redhat, etc. over the weekend.
> 
> Background Info
> 
> Frequently, certain CDROM applications ie cdparanoia and cd burning
> require
> SCSI access to an IDE/ATAPI CDROM device because it offers a richer set
> of features
> to control it.
> 
> The default manner of CDROM control in a stock Linux kernel is via the
> ATAPI interface.  In fact, it appears to me that unless the ATAPI
> interface is turned off as a kernel option, the CDROM drive will be
> accessed
> this way no matter what options might be selected elsewhere. (Ie: grub
> and
> lilo)
> 
> Symptoms Of a IDE/ATAPI SCSI CDROM Problem
> 
> - linux crashes or becomes unresponsive when accessing the CDROM
> - the message "hdx lost interrupt" appears (x = CDROM drive)
> - CDROM applications hang
> - improper operation of the CDROM in general
> - your operation require SCSI CDROM access
> - a dirty dmesg printout after CDROM operation
> - the process using the CDROM won't kill after crashing
> 
> Root Problem
> 
> IDE-ATAPI CDROM operation becomes unstable under SCSI emulation if both
> of the following options are
> selected:
> 
> a) SCSI CDROM Support
> b) IDE-SCSI Emulation
> 
> SCSI CDROM support is enabled to allow the use of a true SCSI CDROM
> IDE-SCSI Emulation is enabled to allow Linux to emulate a SCSI CDROM
> when
> accessing an IDE CDROM.
> 
> WARNING: There may be more to this issue than resolving these two
> options.
> My CDROM works OK with these two options resolved.  Others are saying
> that
> they need to disable all the low level SCSI drivers in the kernel.
> 
> So... to set a CDROM up for SCSI access, one should perform the
> following:
> 
> a) check that the line hdx=ide-scsi appears in your boot loader (ie lilo
> or
> grup.) x = the position of the cdrom drive ie hda for primary master,
> hdb
> for primary slave, hdc for secondary master, etc.  This line will
> request
> that linux operate the CDROM in SCSI emulation mode
> 
> b) in the kernel options, the ATAPI CDROM support MUST be turned OFF.
> This option is selected under ATA/IDE/MFM/RLL Support-> ATA/IDE.. Block
> Devices-> Include IDE/ATAPI CDROM Support.  Turning this option off will
> force Linux to access the CDROM by another method.
> 
> c) in the kernel options, in the same area, SCSI Emulation Support must
> be
> turned ON.  This allows Linux to access the EDI/ATAPI CDROM via the SCSI
> emulation interface.
> 
> d) in the kernel options, Under SCSI Support, turn off SCSI CDROM
> Support.
>  SCSI CDROM Support is used to access a real SCSI CDROM.
> 
> e) in /dev/, set the /cdrom link to point to /hdd.  Actually I am not
> sure
> about this.
> 
> f) It might or might not help to disable autorun or at least disable the
> CDROM player application from attempting to control the CDROM device.
> 
> I hope this helps someone.
> 
> Nobody
> 
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