Errors and problems reading DVDs (dual layer?)

[Daniel Bonniot <Daniel.Bonniot@inria.fr>]

Hi,

As soon as I put a DVD video in my drive, kern.log starts filling up with:

Sep 18 09:40:56 localhost kernel: hdd: packet command error: status=0x51 { 
DriveReady SeekComplete Error }
Sep 18 09:40:56 localhost kernel: hdd: packet command error: error=0x54
Sep 18 09:40:56 localhost kernel: hdd: packet command error: status=0x51 { 
DriveReady SeekComplete Error }
Sep 18 09:40:56 localhost kernel: hdd: packet command error: error=0x54
Sep 18 09:40:56 localhost kernel: hdd: packet command error: status=0x51 { 
DriveReady SeekComplete Error }
Sep 18 09:40:56 localhost kernel: hdd: packet command error: error=0x54

The errors seem to be coming at a rate of about 75/second. Reading the DVD 
with xine works fine (most of the time), and there are no problems with 
CD-ROMs or audio CDs.
A few times, I had problems in the middle of playing DVDs, in the second half, 
which makes me think that this could be related with reading on the second 
layer (that might or might not be related to the above errors).

A search on debian-kernel and debian-user did not show up any relevent info.

What could be going wrong?

Here is some system info:

Debian kernel-image:
Linux blanche 2.6.6-2-686 #1 Wed Jun 16 01:25:38 PDT 2004 i686 GNU/Linux


sudo hdparm -I /dev/hdd

/dev/hdd:

ATAPI CD-ROM, with removable media
        Model Number:       HITACHI DVD-ROM GD-2500
        Serial Number:
        Firmware Revision:  0101
Standards:
        Likely used CD-ROM ATAPI-1
Configuration:
        DRQ response: 50us.
        Packet size: 12 bytes
Capabilities:
        LBA, IORDY(can be disabled)
        DMA: sdma0 sdma1 sdma2 mdma0 mdma1 *mdma2
             Cycle time: min=120ns recommended=120ns
        PIO: pio0 pio1 pio2 pio3 pio4
             Cycle time: no flow control=120ns  IORDY flow control=120ns


Thanks in advance for any help or clue.

Daniel