I just wanted to report this very bug. It is pretty much the same on Dapper. I have "put display to sleep" enabled in Power Manager, and that's what happens when whatching a movie with totem. (gnome- screensaver is disabled, pointless when one has DPMS)
It was interesting to see it happen, since prevention for this has always been working even on older players (e.g. mplayer and xscreensaver) for ages. This must be a bug coming with g-p-m, hal or some new thing that hasn't been around so long (imho). -- [edgy] Screen blanks when watching movies https://launchpad.net/bugs/66257 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs