If I can be permitted to respond to my own question: I found that I can access both card with different copies of xawtv, the step that I was missing was to set the address with v4l-conf for the second (/dev/video1) device. So: # v4l-conf -a 0xF0000000 -c /dev/video1 Then, if I make sure the correct config file is linked to from ~/.xawtv I can view images from both devices. Of course, there is a little interference from a performance and screen rendering perspective, but I think that will be acceptable. Really what I want to be able to do is do an unseen capture (with lavrec) on one device, while perhaps viewing from another. I still would like xawtv and other v4l tools to have the option of specifying the config file on the command line, so I can have different configs for different devices. *** One problem though. Somehow, while doing all my video testing, I seem to have messed up my ability to view TV signals from the tuner on my WinTV Theater card. I can view from the Composite input, but none of the channels come in. I rebooted to windows, and the card is working fine, so it's a linux problem. I checked all the related drivers, and they are all the same as when things were working, so if anyone has encountered a tuning problem that creaped up, and then disappeared, I'd love to know how you made it disappear. Thanks once again for any hints and other help, Bill /*************************************************************************/ /* Bill Sherman (wsherman@xxxxxxxxxxxxx) */ /* National Center for Supercomputing Applications */ /* University of Illinois at Urbana-Champaign */ /* Og - "You want to do mankind a real service? Tell funnier jokes" */ /* Spinner - "but facts don't always reveal the truth" */ /* Robin - "Yeah, but I always figure that's the writers' fault" */ /*************************************************************************/