Unable to enable DMA on my DVD drive

[Bob Nielsen]

On Mon, Feb 21, 2005 at 03:54:14AM +1100, Adam Membrey wrote:
> Hi, I'm trying to enable DMA on my Pioneer Drive (DVD-RW DVR-108) as I'm 
> experiencing gradual but huge losses between audio and video whilst 
> watching DVDs using mplayer. I'm using sudo hdparm -d1 /dev/hda and I'm 
> receiving the following error message:
> 
> /dev/hda:
> setting using_dma to 1 (on)
> HDIO_SET_DMA failed: Operation not permitted
> using_dma    =  0 (off)

Does 'hdparm -I /dev/hda' indicate any DMA capability?

> 
> I do have throttling using powernowd but would that be affecting the 
> loss I'm getting in any way?
> 

You could try killing powernowd and see if that makes any difference.

Bob