I've recently bought a new laptop with a dvd/cdrw combo drive. The playback of 
DVDs is not very good. The movie stops for a short while every few seconds, 
maybe best described as choppy. On my previous laptop I could use the 
following command to turn DMA on

$ hdparm -d1 /dev/hdc

Then the playback was prefect. This isn't supported with my new drive. Do 
anybody have a suggestion of how I can improve dvd-playback? (In grub it says 
hdc=ide-scsi, /dev/cdrom points /dev/scd0.) If I try the command on hda I get 
a message saying 

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

The same happens if I try that on /dev/hdc. 

-- 
Øystein Olsen, [EMAIL PROTECTED], http://folk.uio.no/oeysteio
Institute of Theoretical Astrophysics, http://www.astro.uio.no
University of Oslo, Norway



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