DVD Drive Issues - DMA turns off/kernel messages

[markusg]

Hopefully someone can help me with this.

I have a AOpen DVD drive which works fine in Windows XP when playing DVDs/etc. Here's the output from hdparm -i:

Model=AOpen 12xDVD-ROM DRIVE 10042000, FwRev=R04, SerialNo=
Config={ Fixed Removeable DTR<=5Mbs DTR>10Mbs nonMagnetic }
RawCHS=0/0/0, TrkSize=0, SectSize=0, ECCbytes=0
BuffType=unknown, BuffSize=0kB, MaxMultSect=0
(maybe): CurCHS=0/0/0, CurSects=0, LBA=yes, LBAsects=0
IORDY=on/off, tPIO={min:120,w/IORDY:120}, tDMA={min:120,rec:120}
PIO modes: pio0 pio1 pio2 pio3 pio4
DMA modes: sdma0 sdma1 sdma2 mdma0 mdma1 mdma2
UDMA modes: udma0 udma1 *udma2
AdvancedPM=no
Drive conforms to: device does not report version: 1 2 3 4

I've attempted to get this drive to work properly with Gentoo, but when using both Ogle and Xine to play DVDs, I get horrible perfomance.

First, I noticed that DMA was not on, so I issued:

hdparm -d 1 /dev/hda (which is DVD drive, my hard drives are on another controller). After I do that, hdparm gives me this output:

/dev/hda:
HDIO_GET_MULTCOUNT failed: Invalid argument
IO_support = 0 (default 16-bit)
unmaskirq = 0 (off)
using_dma = 1 (on)
keepsettings = 0 (off)
readonly = 1 (on)
readahead = 8 (on)
HDIO_GETGEO failed: Invalid argument

Looks like DMA is now on, so I play a DVD... and still poor, jumpy, video.

Also, oddly, DMA decides to turn itself off. Also, I seem to get these messages (via dmesg):

hda: ATAPI reset complete
hda: cdrom_decode_status: status=0x51 { DriveReady SeekComplete Error }
hda: cdrom_decode_status: error=0x30
hda: cdrom_decode_status: status=0x51 { DriveReady SeekComplete Error }
hda: cdrom_decode_status: error=0x30
hda: cdrom_decode_status: status=0x51 { DriveReady SeekComplete Error }
hda: cdrom_decode_status: error=0x30
hda: cdrom_decode_status: status=0x51 { DriveReady SeekComplete Error }
hda: cdrom_decode_status: error=0x30
hda: ATAPI reset complete

I've made sure that the kernel has support for my IDE chipset. I've tried mounting/not mounting the DVD. I've also pulled everything else off the channel with no improvement.

I'd chalk it up to a bad DVD drive, cable or controller, but it works fine in XP with the same DVD and drive. I'd rather not have to boot into XP to play DVDs .

Any suggestions?

[pilla]

could you post your /proc/ide/hda/settings?

And you can change your configs directly there. Maybe you could try different access modes. See http://linux-sxs.org/hdptune.html this page for info in accepted modes.
_________________
"I'm just very selective about the reality I choose to accept." -- Calvin

[markusg]

Here it is: