Okay, maybe swapping to the nVidia card isn’t going to make things any easier…
I had a working configuration with it on the old Slackware box, but that was with a specific version of the nVidia driver. The ‘official’ packaged driver for Kubuntu is a newer one, and TV-out doesn’t work at all with the newer drivers for some reason. I can uninstall the packaged drivers and then manually install the old drivers and TV-out starts working again, but then the X server hangs on a regular basis. And even when it works for a while, MythTV itself crashes after you finish viewing a show on the TV-out screen, but not on the monitor. I can either have a working TV-out, or stability, but not both.
I could try upgrading to the just-released Ubuntu 7 and see if that fixes the X server hangs, but major version upgrades can be tricky and I just got everything configured the way I need.
I used to love fiddling with Linux as a hobbyist, with the fun being in the learning as I went along, but sometimes you just want something to just work with as little fuss as possible. Maybe I’ll just get a Mac Mini and use it as a dedicated MythTV frontend…