I have just recently set up a pvr system using mythbuntu. I have a pvr150 for a tuner and had the remote working by following this guide: http://www.blushingpenguin.com/mark/blog/?p=24. I cannot set up the ir blaster for this part because the bulb at the end fell off. I have purchased a RS232 IR Blaster to use instead of the broken one.
Now my question is how to set up the IR blaster and get it working with my directv d12-300 stb. i don't know how to do the channel change script or the testing to see of the new ir blaster even works.
p.s. If i can't use the pvr150 remote and RS232 IR Blaster at the same time that is ok because i mostly just want an ir blaster.