Re: DVD playback not working

["Steve O'Hara-Smith" <steve@xxxxxxxxxx>]

On Sun, 13 Jul 2008 13:21:36 +0200
Michael Neumann <mneumann@ntecs.de> wrote:

> Simon 'corecode' Schubert wrote:
> > Hey,
> > 
> > Yesterday night I tried to play a DVD.  No luck.  I tried with Ubuntu, 
> > no luck either until I installed libdvdcss.  So my drive works, but 
> > DragonFly has no means of playing a DVD.
> > 
> > That's pathetic.
> > 
> > A selection of error messages (all with libdvdcss installed):
> > 
> > ogle:
> > (from dmesg)
> > ata0: FAILURE - non aligned DMA transfer attempted
> > acd0: setting up DMA failed
> 
> Googling for "non aligned DMA transfer attempted" lead me to this page
> (in German):
> 
> http://www.bsdforen.de/showthread.php?p=185404
> 
> So it seems FreeBSD (7.0) has the same problem. Someone suggests the
> following:
> 
>    natacontrol mode acd0 pio4

	This does work - at the cost of very high CPU utilisation
(especially when trying to read a DVD at high speed with dvdbackup etc).
This problem has been around a while - see "Reading DVD video broken in
recent current" in bugs@ from 11 Jan. It started between preview and
current at that time. I've made periodic attempts to track it down without
success.

-- 
C:>WIN                                      |   Directable Mirror Arrays
The computer obeys and wins.                | A better way to focus the sun
You lose and Bill collects.                 |    licences available see
                                            |    http://www.sohara.org/