Troubleshooting:mythbackend: Problem with capture cards: Card 1failed init
I was getting this message from the backend (in the mythbackend.log) followed by some messages implying I didn't have a capture card configured (although I did). In my case, the trouble was I didn't have all the appropriate drivers loaded.
On my distribution (PCLOS) I load the modules in /etc/rc.local but there are other possible ways to load them. To get my setup (PVR-350, using the remote for input, and also using a serial IR blaster to control the cable box) working properly I added this to rc.local:
modprobe lirc_serial modprobe lirc_i2c modprobe -r ivtv;modprobe ivtv modprobe msp3400 modprobe tveeprom modprobe tuner
With the last three items missing from the list, mythtv-setup did not complain but when I would try to schedule a recording (or watch live TV) from the frontend, the backend would post the 'card failed init' message.
Note: the ivtv line in the above snippet is for an unrelated issue (IVTV unable to find firmware) but I included it here for completeness. --Mjrice