[mythtv-users] Scan for channels not working with 2.6.20 kernel

[sj_pereira]

Hi list members,

I just subscribed since I'm starved for info.  I spent last weekend getting 
my first Myth box up and working when I ran into this channel scan not 
working problem.  I have two pchdtv-3000 cards in a converted Dell server 
SC420/P4 2.8G box.  I've been trying to follow the howto on Jarod's web site 
(which I'm thankful for).  Obviously, I'm stuck at the moment and I was 
wondering if anyone can tell me how to get from where I'm at now to a system 
that will record my over the air digital channels.

Can I downgrade the packages to an earlier verison that doesn't have the 
problem?  What SU commands would I run to do that?  I've done a 'yum -y 
upgrade' as recently as yesterday.  So I believe everything is up to date 
using the ATRPMs in the howto web site.  But still no dice with the Digital 
tuner in Myth.  I was able to scan for digital channels from the command 
prompt using the DVB utilities that I also installed using the KDE 
installer.

Shall I try mythdora 3.2?  I'd rather not since I've put a lot of time into 
getting FC6 on this box, and I'd hate to start all over again.  But if 
that's my best option right now, I'll do it.

I suppose the other option is to compile and install from source, but I 
haven't looked into that yet.  I did end up having to compile the Nvidia 
driver kernel interface, which was easy after getting the right libs.  I'll 
take a wild guess and suggest that compiling the Myth package is at least an 
order of magnitude more difficult :-)

Also, I ran into the DVB module loading problem.  I'm not sure how I fixed 
it, but the /dev directories are now showing up after cold boot.  I think 
that installing the DVR packages from the KDE add/remove software list 
changed something that fixed the DVB module load.  Is that possible?  I know 
I didn't do the other suggestions that I've seen on this list :-)  Anyway, 
the DVB issue was fixed before I used the DVB utilities to check my 
pchdtv3000s.

Regards,
-David

Partial message copied from on-line list archive:

> On Monday 26 March 2007 10:05:31 Nathan Faust wrote:
> Which tuner card are you using?
> I'm receiving QAM256 perfectly fine on my Kworld ATSC 110 with kernel
> 2.6.20.3 (Ubuntu Feisty 2.6.20-12)
>
>
>Something is definitely horked, at least in Fedora-land. I'm looking into 
>it.
>
>Summary:
>
>DVB channel scanning doesn't work for me using Axel's latest 0.20 mythtv
>builds, across kernels 2.6.19-1.2911.6.5.fc6 and 2.6.20-1.2925.fc6, and
>across a pcHDTV HD-3000, an AirStar HD-5000 and an HDHomeRun (which leads 
>me
>to believe this isn't a kernel issue). Current mythtv svn trunk (pre-0.21 
>dev
>code) works just fine though. Pretty sure channel scanning worked w/0.20 
>less
>than a month ago, but I'm not sure yet exactly what broke things or when.