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[OCLUG-Tech] dma in Ubuntu?

Recently k3b has been complaining on startup:

   DMA disabled on device HL-DT-ST - DVDRAM GSA-4167B

I'm running Ubunutu Hardy (Jaunty seems to be set up very differently, with different /dev/... for the DVDRW)

When I try

   hdparm -d /dev/hda

I get

/dev/hda:
 using_dma     =  0 (off)

Putting in

/dev/hda:
 setting using_dma to 1 (on)
 HDIO_SET_DMA failed: Operation not permitted
 using_dma     =  0 (off)


I've looked on the web, and there is some commentary about enabling dma in the kernel. Yikes -- we shouldn't need regular users to do that.

Any ideas? Or is this a false complaint by k3b.

JN

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