Now that I've setup my DVB-C adapter (here), MythTV will no longer record from my PVR-150 adapter. I've switched from ivtv-kmdl to video4linux-ivtv-kmdl as a driver. However, according to /var/log/messages, both of my IVTV cards are still detected. What's going on?

It turns out that I've placed the DVB-C card in my first PCI slot. Because of this, it's now detected first, before the IVTV cards. It turns out that /dev/video0 is now in use by the DVB-C card. I have no idea what this does, as /dev/dvb/adapter0/ is for this card, but it's there anyway.

As a result, the two IVTV cards have shifted one slot. The PVR-150 is now on /dev/video1 and the PVR-250 card is now on /dev/video2. A simple change to these devices in mythtv-setup is sufficient. At least my analog recordings now work again. Next step is to get digital recordings going!