[mythtv-users] Help getting KWorld/VStream XPert DVB-T to work

David Watkins watkinshome at gmail.com
Wed Dec 21 17:27:03 EST 2005


On 21/12/05, Joacim J <jocke4news at gmail.com> wrote:
> On 12/21/05, David Watkins <watkinshome at gmail.com> wrote:
> > On 21/12/05, Joacim J <jocke4news at gmail.com> wrote:
> > > On 12/21/05, David Watkins <watkinshome at gmail.com> wrote:
> > > > On 21/12/05, Joacim J <jocke4news at gmail.com> wrote:
> > > > > Thanks anyway ;-)
> > > > >
> > > > > Do you have any idea about the questions I wrote:
> > > > >
> > > > > I don't have the /dev/dvb/... or the adapter/frontend aren't
> > > > > registered...is it because the /dev/dvb/...isn't created?? When/Where
> > > > > are /dev/dvb/... created?
> > > > >
> > > >
> > > > I missed the beginning of this thread, but have you looked at which
> > > > dvb modules are being loaded?
> > > >
> > > > /sbin/lsmod
> > > >
> > > > For my Nova-t card I had to manually modprobe cx88_dvb (I think that's
> > > > the correct name) because the wrong [blackbird] module was being
> > > > automatically loaded.
> > > >
> > > > It was the
> > > >
> > > > /sbin/modprobe cx88_dvb
> > > >
> > > > command that created the /dev/dvb/adapter stuff
> > > >
> > > > ( look in dmesg for errors / success messages)
> > > >
> > > > I'm not saying that this is the module for you (though it's worth a
> > > > try) but you need to find out which module it is you need, and check
> > > > that it is being loaded.
> > > >
> > > > HTH
> > >
> > > David,
> > >
> > > Here I got something interesting.
> > >
> > > 1. Fresh booted machine and the dmesg is not showing any DVB info
> > > 2. Result of /sbin/lsmod command is below
> > > 3. Executed "/sbin/modprobe cx88_dvb"
> > > 4. dmesg now show som interesting output, see below at the end. And I get:
> > >
> > > [root at HTPC ~]# ls -al /dev/dvb/adapter0/
> > > total 0
> > > drwxr-xr-x  2 root root    120 Dec 21 12:26 .
> > > drwxr-xr-x  3 root root     60 Dec 21 12:26 ..
> > > crw-rw----  1 root root 212, 4 Dec 21 12:26 demux0
> > > crw-rw----  1 root root 212, 5 Dec 21 12:26 dvr0
> > > crw-rw----  1 root root 212, 3 Dec 21 12:26 frontend0
> > > crw-rw----  1 root root 212, 7 Dec 21 12:26 net0
> > > [root at HTPC ~]#
> > >
> > > Now, how can I make persistent? I mean so the module 'cx88_dvb' is
> > > loaded every time.
> >
> > Well for me, all I had to do was prevent the cx88_blackbird module
> > loading, and then my system automatically loaded the cx88_dvb instead.
> >
> > I notice that you've also got the blackbird module in there so maybe
> > that would work for you too.
> >
> > As you've found out loading the cx88_dvb on top doesn't seem to cause
> > any problems so you can just force it to load.
> >
> > As for how to do either of the above, I'm afraid I'd have to look up
> > the way I did it tonight and I suspect it's distribution dependent
> > anyway.  I'm running Fedora Core 3, so if you don't get any joy before
> > I get home tonight I can let you know my solution.
> >
> > Post back with the flavour of linux that you are using, and I suspect
> > someone else here will be able to help you.
> >
> > In the meantime you could look at using /etc/modprobe.conf or rc.local
> > or rc.sysinit (as described in Jarod Wilson's guide to mythtv on
> > Fedora)
> > _______________________________________________
> > mythtv-users mailing list
> > mythtv-users at mythtv.org
> > http://mythtv.org/cgi-bin/mailman/listinfo/mythtv-users
> >
>
> I have Fedora Core 4 with kernel 2.6.14-1.1653_FC4.
>
> I have tried to add the following in /etc/rc.d/rc.local
> /sbin/modprobe --remove cx88_blackbird
> /sbin/modeprobe cx88_dvb
>
> It seems that the cx88_dvb module is loaded and blackbird is not, at boot time.
>
> Is this the correct way of doing this??
>
> Earlier I did som testing with dvbscan, tzap and dvbstream and I get
> some result that I haven't got before but no picture.
>
> When running dvbstream with command:
>
> ./dvbstream -o -ps -qam 64 -cr 2_3 1018 1010 | mplayer -
> it says:
> Reading from stdin...
> and nothing happens
>
> If I have started
> tzap "SVT1"
> before (that puts out some data every second that says FE_HAS_LOCK)
> and then run dvbstream with:
> ./dvbstream -o -ps -qam 64 -cr 2_3 1018 1010 | mplayer -
> it also says:
> Audiostream: Layer: 2 BRate: 256 kb/s  Freq: 48 kHz
> but  no mplayer appears.

Hmm, sounds like you're close.  Are you sure mplayer is installed
properly.  It might be worth skipping the mplayer stage and trying to
do a channel scan in mythtv?


More information about the mythtv-users mailing list