DVD that other computers can't play

Steve O'Hara-Smith steve at sohara.org
Sun Feb 7 12:36:03 PST 2010

On Sun, 7 Feb 2010 11:37:33 -0500
Pierre Abbat <phma at phma.optus.nu> wrote:

> I installed vlc and tried to play the disk. It came up with a menu 
> saying "English/Español"; I picked one and tried to play one of the
> movies. It is now spewing an endless stream of the following error on the
> console: acd0: setting up DMA failed
> ata1: FAILURE - oversized DMA transfer attempt 100352 > 65536
> At least that's farther than I got on Windows, and I understand the
> error. How do I fix it?

	Nasty - I thought that problem was fixed some time ago, I haven't
seen it recently. A workaround is to use natacontrol to turn off DMA on the
drive like this:

natacontrol mode acd0 pio4

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