cd recording not working properly

[peter76]

I have an iBook 900 with 600 MB ram and neither in hoary nor breezy and now dapper is the cd burning working properly. ( btw, I did put dma on in hoary and breezy). Under mac OSX eveything works fine. I tried different programs as well, but it all comes down to cdrecord anyway, and it sometimes works, but most of the time I get a coaster. I decide to dive into this, because I completely want to switch to Ubuntu, so here's the info I've got so far:

- a lot of times I get Apr 16 00:37:26 ibook kernel: [32137.893176] scsi: unknown opcode 0x01
  but this doesn't seem to affect the burning, because it sometimes still works.
- Then I got one time:
  Apr 15 14:26:43 ibook kernel: [ 6192.347762] ide-pmac lost interrupt, dma status: 8400
Apr 15 14:26:50 ibook kernel: [ 6192.347786] hda: lost interrupt
Apr 15 14:26:51 ibook kernel: [ 6192.347802] hda: dma_intr: status=0xd0 { Busy }Apr 15 14:26:51 ibook kernel: [ 6192.347815] ide: failed opcode was: unknown
Apr 15 14:26:51 ibook kernel: [ 6192.347834] hda: DMA disabled
Apr 15 14:26:51 ibook kernel: [ 6192.347845] hdb: DMA disabled
Apr 15 14:26:51 ibook kernel: [ 6192.395755] ide0: reset: success

This looks quite serious to me... Going over the debian mailing list, I found some more iBook owners also having dma disabled, but not always with cd burning. I tried to reproduce this one; after a reboot, burned the same cd on the same type of blank, but now it worked fine, althoug halfway through the speed went down to 4x and stayed there. Buffer always full enough.Still not good though I reckon. Hope this can be sorted out. Ubuntu is great!! If any more info is needed, ask, and I will provide it.

[Dennis Kaarsemaker (dennis)]

bumping severity isn't neccessary.

[Schily (schilling-fokus)]

This may be a cable problem, a chip problem, a Interrupt
rrouting problem in the Linux kernel.

It also may be a problem with Linux removable media
support.

If you like to investigate in the problem, I encourage you to
fist upgrade to a recent original cdrtools

http://cdrecord.berlios.de/

and to kill the Linux removable media support processes.

Check this description:

http://fy.chalmers.se/~appro/linux/DVD+RW/#tutorial

on how to disable the non-cooperative software.

[Reinhard Tartler (siretart)]

peter, is your bug still valid? did you have more success lately and we can close this bug?

[peter76 (pf-moll)]

I think it is not really valid anymore... It turned out to be a problem with the cable; the cdrom and my harddisk where on the same ide cable, which caused problems; I could get around this by setting the -immed and -minbuf flags of cdrecord.... I apologize for never posting back about this. Roquier Philipe ( The author of Brasero ) was so kind to implement these features in Brasero via a gconf setting...
Still don't know how OS X solves this problem.... Hope this bug can be closed now..

[Schily (schilling-fokus)]

If it works with OS X, this may be a result of different filesystem buffering
in OS X.

[Schily (schilling-fokus)]

Set to "invalid" after confirmation from "peter76"