I have a 4-port Geovision card marked "GV650" on a sticker placed on a DIP-8 IC. 'lspci' is showing 650a:763d and 650b:763d. I'm loading the bttv module with "card=157,158". Only two of the four BNC inputs on this card are displaying video when connected. Are there some known quirks I'm missing in a google search?
hverkuil: I'm working on/testing cedrus driver with tag support and I noticed that it doesn't work if kernel is 64 bit and userspace 32 bit
it turns out you forgot to update v4l2-compat-ioctl32.c