Nota Bene for people swapping out PCs in Myth systems

In the past I've gotten away with swapping out HDs from Linux systems to newer PCs. After the most recent swap, I noticed two things stopped working: sound volume and DVD playback in Myth's internal player. Checking the settings between the troubled backend and the slave backend did me no good; they were identical.

What had happened with the DVD was that /dev/dvd wasn't being created properly at boot. Error messages reading "can't stat /dev/dvd" turned up a search which led to /etc/udev/rules.d/70-persistent-cd.rules, the config file which describes your optical drives' default /dev/ creation. Another blogger had discovered that replacing his optical drive did not automagically bring everything up to snuff; another set of rules were added but the previous set of rules were not deleted.

I haven't nailed down the audio problem yet, but I suspect it's similar. Edit: Apparently this is a problem with Intrepid and the onboard VIA 82xx audio chipset driver. I'll be experimenting with an audio card to see what I can do there.