needs ivtv installed to create cap node

for ubuntu edgy, see:
https://help.ubuntu.com/community/Install_IVTV_Edgy#head-4dab30da47e2645aa5f1c6d6956f6e1e41b816bd

notibly, this needs to be done on new kernel:
      sudo m-a update,prepare
      sudo m-a a-i ivtv
      sudo depmod -a