unable to rip/play DVDs on PB5,4

["Matthew T. Atkinson" <matthew@agrip.org.uk>]

'ello,

I installed acidrip on my Athlon box and it works fine when reading and
ripping a given DVD (that appears to be encrypted).  However, on my PB,
with the same setup (but mplayer-g4 instead of -k6) it simply fails to
read the disc, suggesting that it may be faulty.  I also can't play the
disc using mplayer for the same reason.  The error message I get from
lsdvd on the PB is:

matatk@oberon:/usr/share/doc/libdvdcss2$ lsdvd /dev/hdc
libdvdread: Using libdvdcss version 1.2.8 for DVD access
libdvdread: Invalid IFO for title 1 (VTS_01_0.IFO).
Can't open ifo 1!
matatk@oberon:/usr/share/doc/libdvdcss2$

and:

matatk@oberon:/usr/share/doc/libdvdcss2$ dpkg -l | grep dvd
ii  dvd+rw-tools   5.21.4.10.8-1  DVD+-RW/R tools
ii  libdvdcss2     1.2.8-0.0      Simple foundation for reading DVDs -
runtime
ii  libdvdread3    0.9.4-5        Simple foundation for reading DVDs
ii  lsdvd          0.10-0.0       read the contents of a DVD
matatk@oberon:/usr/share/doc/libdvdcss2$

which is the same set of packages and versions that my Athlon desktop
has.  Any thoughts on what's going on?

Thanks in advance, best regards,


-- 
Matthew T. Atkinson <matthew@agrip.org.uk>