dvd dma problems

[Jeremy Chadwick]

On Sun, Jul 13, 2008 at 05:02:00PM +0200, Dominic Fandrey wrote:
> I have a couple of DVD drives (one drive, one burner) that used to play DVDs
> quite fine from 5.3 to somewhere in the 6.x branch. Nowadays I have to send
> them to PIO4 to play DVDs, because they'll just throw DMA not aligned errors
> around in UDMA33 or WDMA2 mode.
> 
> Should someone be interested in this I'm willing to supply all necessary
> information, such as the exact drives, firmware versions, kernel traces...
> whatever comes to your mind. I'm also willing to test patches.

Is the problem you're seeing identical to this?

http://lists.freebsd.org/pipermail/freebsd-hackers/2008-July/025297.html

-- 
| Jeremy Chadwick                                jdc at parodius.com |
| Parodius Networking                       http://www.parodius.com/ |
| UNIX Systems Administrator                  Mountain View, CA, USA |
| Making life hard for others since 1977.              PGP: 4BD6C0CB |