Help please: Can't get xawtv or /dev/video working

Hi,

   I have been trying to get /dev/video to show up to no avail:

 This is xawtv-3.79, running on Linux/i686 (2.4.19)
 dlopen: /usr/lib/xawtv/conv-mjpeg.so: undefined symbol:  jpeg_resync_to_restart
 WARNING: Your X-Server has no DGA support.
 can't open /dev/video0: No such device
 v4l-conf had some trouble, trying to continue anyway
 v4l2: open /dev/video0: No such device
 v4l2: open /dev/video0: No such device
 v4l: open /dev/video0: No such device
 no video grabber device available

At this point I'm just going in circles. From one howto to another. The
kernel docs have been no help. I would be more than happy to RTM if I could find it! 
Please help if you can. If only a pointer to a COMPLETE document on how to do this.

PS I can not turn on DGA without the Xserver crashing. That is why there is "no DGA support". Actually just a sensible explanation of how DGA DRI and Xv work together would probably help.

Thanks,

J Sims