Choppy video in Ogle 9.1

I am running Ogle 9.1 on a Debian Unstable system, on an AMD Athlon 1Ghz
laptop with a Trident Microsystems CyberBlade/XP video card (trident
driver); I am also using devfs and ide-scsi.

When playing a video in Ogle, the sound is perfect but the video is
choppy. Strangely enough, when I play the same DVD in VLC, the video is
perfect but the sound is choppy. Arrgh. I assume, from what I have read,
that this is likely a dma problem.

I have read the FAQ, and gone through the mailing lists, and following the
instructions there I have done the following:

1. Made sure I had ogle-mmx installed
2. Tried to turn on the dma on the dvd drive. Problem is, I'm really not
sure what the right address for the thing is.

My DVD/CDRW is (according to K3B, in any case) at the following location:

 /dev/scsi/host0/bus0/target0/lun0/cd

which unfortunately isn't good enough for hdparm:

 # hdparm -d1 /dev/scsi/host0/bus0/target0/lun0/cd
 /dev/scsi/host0/bus0/target0/lun0/cd not supported by hdparm

I tried the following:

 # hdparm -d1 /dev/ide/host0/bus0/target0/lun0/disc
 /dev/ide/host0/bus0/target0/lun0/disc:
 setting using_dma to 1 (on)
 using_dma    =  1 (on)

Which seemed to turn something on somewhere. Is this the DVD drive? It
made no difference to the choppy video in Ogle or choppy sound in VLC.

I then tried:

 # hdparm -d1 /dev/ide/host0/bus1/target0/lun0/generic
 /dev/ide/host0/bus1/target0/lun0/generic:
 setting using_dma to 1 (on)
 HDIO_SET_DMA failed: Operation not permitted
 using_dma    =  0 (off)

So, I'm at a bit of a loss. I am guessing that in order to get smooth
video AND sound, I will have to figure out how to turn on dma on the
dvd/cdrw drive. How to do that seems to be beyond me.

Any suggestions?

Thanks, B.