Dell D610, xine, DVD and DMA mode

[pparks1]

I have a significant frame rate problem with my Dell Latitude D610 notebook running Fedora Core 4.

The DVD+/-RW drive stutters very badly in xine. I made the assumption that I would have to enable dma, using hdparm -d1 /dev/hdc, but I get the following error:
setting using_dma to 1 (on)
HDIO_SET_DMA failed: Operation not permitted
using_dma = 0 (off)

Yes, I was doing this as root. I believe the problem is that this laptop has a SATA controller that this drive is plugging into.

Anybody have any suggestions on what I can do to improve my DVD playback performance? Currently, it's unusable. I've tried xine, totem and mplayer and all have the same problem.

accoding to /var/log/dmesg
hdc: SONY DVD+/-RW DW-D56A, ATAPI CD/DVD-ROM drive
hdc: ATAPI 24X DVD-ROM DVD-R CD-R/RW drive, 2048kB Cache
Uniform CD-ROM driver Revision: 3.20

Hope somebody has a suggestion for me, i'm down to my last few configs and would be very disappointed if I could not get DVD playback to work.

[steve941]

this is on other posts... your ide drives including your cdrom is connected to an sata controller thus your dvd writer should be sdc. It requires a kernel modification which i am working on but have not had success.

[pparks1]

Actually there is NO /dev/sdc on my system.

The hard drive is /dev/sda, the USB floppy (when connected) is /dev/sdb.

Here is the output from ls sd* from /dev
$ ls sd*
sda sda1 sda2 sda3 sda4 sda5 sdb sdb1

[steve941]

I know, Its not on mine either, thats why we cant enable dma, but the dvd writer should be sdc instead of hdc, i havnt figured this out yet on how to do it..

[montecarloss]

I am having the same problem with my D610. Any luck?

[pparks1]

As of yet, I don't think that this problem has been resolved. It sure does bum me out to have to rebot into Windows XP on this laptop in order to watch a movie :(

[kurifu]

I have a Dell Inspiron 9300 and I am having the exact same problem as described here. This issue is pushing me back to Windows since currently it seems that Linux is lacking proper support for a lot of the features that I have right now on my system.

If someone does find a fix for this, drop a line here so I know when I can come back to Linux. Hopefully this issue will be complete addressed by FC5.