I just installed Ubuntu a week or so ago and have got most things working, including several versions of software to work with my USB TV tuner card (VLC, TVTime, Mplayer). Various hiccups, etc., but the one specific one is in Mplayer. I'm running Mplayer live using a feed from the tuner card. According to the man pages, I should be able to toggle closed captioning (teletext) with the X key, but it doesn't have any effect.
I know the datastream is there because I can activate it with TVTime. (I also can't find the option in VLC to turn on the captioning, so if anyone knows how to do that, that would be good as well). I want to use mencoder to record TV signals.