kern.log filled with errors when DVD in drive

[Daniel Bonniot]

Hi,
As soon as I put a DVD video in my drive, kern.log starts filling up with:
Aug  7 20:41:35 localhost kernel: hdd: packet command error: status=0x51 { 
DriveReady SeekComplete Error }
Aug  7 20:41:35 localhost kernel: hdd: packet command error: error=0x54
Aug  7 20:41:35 localhost kernel: hdd: packet command error: status=0x51 { 
DriveReady SeekComplete Error }
Aug  7 20:41:35 localhost kernel: hdd: packet command error: error=0x54
Aug  7 20:41:36 localhost kernel: hdd: packet command error: status=0x51 { 
DriveReady SeekComplete Error }
Aug  7 20:41:36 localhost kernel: hdd: packet command error: error=0x54
Aug  7 20:41:36 localhost kernel: hdd: packet command error: status=0x51 { 
DriveReady SeekComplete Error }
Aug  7 20:41:36 localhost kernel: hdd: packet command error: error=0x54

It seems to be at this fixed rate, e.g. 4 lines/second. Reading the a DVD with 
xine works fine, and there are no problems with CD-ROMs or audio CDs. A search 
on this list 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
TIA,
Daniel
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