DVD viewing problems with Sony HS73
I am running Mandrake 10.0 on a DELL Laptop (P4, 1.4Ghz). I downloaded the relevant CSS2 RPMs to play DVDs via Totem which works just great. HOWEVER, when I connect my external Sony SCMHS73 Monitor, the laptop display is replicated perfectly - EXCEPT for DVD playback. I just get a blank screen on Totem AND Mplayer on the Sony, while simultaneously on the Dell native screen, the movie runs just fine.
This is true for both encryoted and non-encrypted DVDs.
Oh, and the initial Gnome.org startup screen on Totem... that comes up blank as well on the external monitor, even though all the controls, menus appear perfectly. Interestingly, when I take a screenshot, even on the Sony, I manage to capture a perfect movie still. Just no movie playback.
I have played about with XFRConfig-4 and the Mandrake settings wizards ad nauseam... could any of you experts help this ailing Newbie?
Thanks in advance,