Question --- couldn't play DVD

Omak

Hallo. I'm running Knoppix (really Debian testing). My Desknote 901A notebook contains an IDE Matshita DVD-ROM SR-8176 MR38 drive. I used the Rpcmgr program from here to set the region code to 1 (I don't plan on buying many DVDs thanks to region coding). /dev/dvd is a symlink to /dev/cdrom which is a symlink to /dev/hdc. The permissions on /dev/hdc are set like this:

ls -al /dev/hdc
brw-rw-rw-    1 root     disk      22,   0 2001-04-14 17:43 /dev/hdc

The following relevant packages are installed:

ii  liba52-0.7.4   0.7.4-1        Library for decoding ATSC A/52 streams.
ii  libdvdcss2     1.2.5-0.2      Simple foundation for reading DVDs - runtime
ii  libdvdnav1     0.1.3-1.2      The DVD navigation library
ii  libdvdplay0    1.0.1-5        a portable abstraction library for DVD menus
ii  libdvdread2    0.9.3-2        Simple foundation for reading DVDs.
ii  libdvdread3    0.9.4-3        Simple foundation for reading DVDs

I'm able to mount the drive fine and can even open the .vob files and play them but it doesn't play well at all even though my processor is plenty fast. When I try to play the DVD using Xine, Ogle, and others I get error messages like this:

libdvdread: Using libdvdcss version 1.2.5 for DVD access
libdvdread: Can't seek to block 256
libdvdread: Can't seek to block 256
libdvdread: Can't open file VIDEO_TS.IFO.

With MPlayer I get errors like this:

gmplayer dvd://1
.
.
.
Playing dvd://1
Reading disc structure, please wait...
libdvdread: Can't seek to block 256
libdvdread: Can't open file VIDEO_TS.IFO.
Can't open VMG info!

I'm out of ideas aside from flashing the firmware on the DVD-ROM but can't imagine that would even accomplish anything. Is there something I'm missing? I'm totally out of ideas. Google has provided some leads, but nothing that has worked.

iceco

用命令mplayer -dvd 1 -dvd-device /dev/hdc
你可以读一读mplayer的doc