[mythtv] How to make sure v4l2 is being used (compile flag?)

[Kevin Kuphal]

The Cyberwizzard wrote:

> I tried hardcoding it back to v4l2 but no avail - it still plunges 
> into an infinity loop of errors :(
>
> Starting up as the master server.
> 2004-11-29 20:41:36.955 mythbackend version: 0.16.20041126-1 
> www.mythtv.org
> 2004-11-29 20:41:36.955 Enabled verbose msgs : important general
> 2004-11-29 20:41:38.956 Found changes in the todo list.
> 2004-11-29 20:41:38.959 Scheduled 0 items in 0.0 seconds.
> 2004-11-29 20:41:38.961 Seem to be woken up by USER
> 2004-11-29 20:41:43.074 MainServer::HandleAnnounce Playback
> 2004-11-29 20:41:43.074 adding: cyberwizzard as a client (events: 0)
> 2004-11-29 20:41:43.098 MainServer::HandleAnnounce Playback
> 2004-11-29 20:41:43.098 adding: cyberwizzard as a client (events: 1)
> 2004-11-29 20:41:43.103 MainServer::HandleAnnounce Playback
> 2004-11-29 20:41:43.103 adding: cyberwizzard as a client (events: 0)
> 2004-11-29 20:41:43.118 MainServer::HandleAnnounce Playback
> 2004-11-29 20:41:43.118 adding: cyberwizzard as a client (events: 0)
> 2004-11-29 20:41:43.125 adding: cyberwizzard as a remote ringbuffer
> 2004-11-29 20:41:43.140 Changing from None to WatchingLiveTV
> VIDIOCMCAPTUREi0: Invalid argument
> VIDIOCMCAPTUREi1: Invalid argument
> VIDIOCMCAPTURE0: Invalid argument
> VIDIOCMCAPTURE1: Invalid argument
> VIDIOCMCAPTURE0: Invalid argument
> VIDIOCMCAPTURE1: Invalid argument
> VIDIOCMCAPTURE0: Invalid argument
> VIDIOCMCAPTURE1: Invalid argument
> VIDIOCMCAPTURE0: Invalid argument
>
> I've heard stories about ppl who had a working setup with this card 
> but none of them actually know how they fixed it (tbh, most of them I 
> don't even trust to know for sure they actually have a cx88 card).
>
> Is there a way to get more info on this error? I tried setting verbose 
> to lvl all but that didn't help...
>
> Berend Dekens

You could try adding more debugging statements around the VIDIOCMCAPTURE 
calls to see which one specifically is failling.

Kevin