Comment 15 for bug 16170

Experiencing similar problems to those mentioned above.
In order to put DVD/CD drives in dma I added piix & ide-core to /etc/modules
above other ide modules. Also edited hdparm.conf

For me The problem seems most consistent on the 686-smp kernel (1xHT P4 cpu)
It happens less consistently on the 686, non-smp kernel.
On the 386 kernel, I've yet to see it happen.

Abit IS7, Intel 865/ICH5 w/onboard SATA
Additional details:
DVD-ROM on hda (pioneer 120s)
CD-RW on hdc (lite-on something or other)
Windows on sda (sata 1)
Ubuntu on sdb (sata 2)

I've since upgraded to breezy (colony 1). The HAL problem seemed to go away,
though there were still erratic problems regarding the hda DVD-ROM drive & dma.
 I swapped out that drive with another and DMA-related issues have *mostly*
cleared up.