well of course the atsc drivers don't work out of the box knoppmyth is configured to have the dvb drivers work out of the box.

_________________
Have a question search the forum and have a look at the KnoppMythWiki.

Xsecrets

Hi,
If you have a new install, I recommend reviewing the knoppmythwiki.org HOWTO again. If you made a lot of changes to use the cx88_atsc modules, it may be easier and better in the long term to just wipe the installation and restart using the cx88_dvb module with the instructions and the Human script.

I updated the HOWTO so that you can use the dtvscan and dtvsignal utilities (see the end of the HOWTO) but knoppmyth HDTV is pretty much dependent on the DVB approach. I also made a note at the beginning to warn new installers to avoid the temptation of installing their HD-3000 as a "pcHDTV capture card (HD-2000 HD-3000)" as that uses the cx88_atsc module. You may get it to work but it will cause you grief in the long run. No matter how reasonable that sounds, stick with the DVB. Hopefully, MythTV will deprecate and remove that option as I think its confusing.

Andrew Lynch

Hmmm... maybe I said something confusing or else I am confused.

I did a standard KnoppMyth install. I set my HD3000 card up as DVB. I've seen other people with the same problem I have, which is you have to rmmod all the cx* modules and then modprobe cx88_dvb and let it load only the modules it needs. This occured for me under both the stock kernel with KnoppMyth (2.6.11) and my newer 2.6.12 kernel. Someone has suggested a boot script to do this as a workaround, but that's kludgy, there must be a better way. If I find it, I will post here.

The only reason I mentioned cx88_atsc is for the command line dtvsignal and dtvscan functionality. They are useful. I will reread the wiki, thanks for the reference.

this is what I was referring to. no you may not get a valid video? as dvb does not use /dev/video devices, and dvb is the default behavior on knoppmyth. Also no dtvscan/signal do not work with the dvb drivers, so no they do not work on default install either, however If you have a good antenna or you already know it's positioned correctly then the dvb drivers and recording and watching tv should work right off the bat.

_________________
Have a question search the forum and have a look at the KnoppMythWiki.

Xsecrets

Okay, I think we're on the same page now. I understand the cx88_atsc stuff is only for dtvsignal. I was following the "EFF's Guide to Building Your Own PVR" instructions. It's weird because I think they are based on the latest version of KnoppMyth and yet they discuss examples using dtvsignal. Anyway, with DVB drivers, once I take care of the rmmod and reprobe, I get great live TV and recording results.

* I did not have any antenna at first... this is my first attempt at OTA ATSC reception. I built a simple antenna and then NEEDED dtvsignal to point it in the right direction to get over 50% signal strength. Fixed the antenna there, and switched to the DVB drivers and now HD3000 is working for me.

This stuff is great!

actually the EFF article is based on a very early R5alpha that used the old hd3000 drivers. the one they used to write up the article was before we even had any public R5 releases.

_________________
Have a question search the forum and have a look at the KnoppMythWiki.

Xsecrets

Yep, that'd be me who referred to the boot script for removing the cx88_atsc module at boot time. Please, if you find a better method share it with the rest of us. Post it here and update the knoppmythwiki page. I am all ears when it comes to a better way.

Thanks!

Andrew Lynch

Cool, I think I'm about to make a tiny contribution to MythTV And please don't take my words the wrong way... if I didn't find a fix, I would have been happy to use yours over the manual method. It's just that I'm a UNIX guy of many years and I try to get to the root problem whenever possible (and, workaround otherwise.)

This worked for me, please try it:

I copied /etc/modules to /etc/modules.orig, then edited /etc/modules and removed a single line -- the line containing cx8800.

I rebooted and that fixed it. Following boot, 'lsmod|grep ^cx' returns:

cx88_blackbird 15108 0
cx8800 29196 0
cx88_dvb 7812 11
cx8802 9860 2 cx88_blackbird,cx88_dvb
cx88xx 51360 4 cx88_blackbird,cx8800,cx88_dvb,cx8802
cx22702 7940 1 cx88_dvb

I'm only guessing, but I think cx8800 was getting loaded too early. By removing it from /etc/modules, it gets demand loaded by another module.

That definitely is a more elegant method to solve the problem. I will give this a try as soon as I am done doing some video tape to xvid conversions. Thanks!

Andrew Lynch

My HD-3000 worked without changes using R5A12. After reading this thread I'm very scared about upgrading to anything newer.

No need to be scared. Do a backup, it all else fails you can revert. Testing R5A17, the 3000 worked w/o issue.

_________________
cesman

When the source is open, the possibilities are endless!

Hear Hear, the whole point of the HOWTO and the poll is to give folks confidence to proceed with an HD-3000 install.

Most likely (according to the poll) the HD-3000 will "just work" without a hitch. Even if it does have problems just follow the HOWTO and you'll get a working HDTV PVR system.

Just make a backup first!

Thanks!

Andrew Lynch

Speaking from the "it didn't work out of the box for me" camp, I'm fairly convinced that this is simply a hardware and BIOS thing. If it "just worked" for you the first time I'd give odds on it "just working" again.

Explaining the 'it didn't work out of the box for me':

1st issue, I can't read. Seriously, I just did not follow directions. My fault.
-Making an additional post installer step where the correct video card drivers get installed would be helpful but again, my fault.
-Remove the pcHD option from the card selection if that option is not expected to work. Again, my fault, should have read more.

2nd issue pcHD 3000 design, the card is not fitting that well on my board (seems case independent as I have the same issue where the card 'jumps' out with 2 totally different computer cases). No issues with any other card that I ever added to the system.

The lspci -v output is very long so I will spare the reader for this.[/list][/i]

Knoppmyth sucked, I used Fedora and Mythtv