[mythtv-users] Which device is which

[Michael Haan]

On 2/16/06, R. G. Newbury <newbury at mandamus.org> wrote:
>
> Brian Wood wrote:
> >> Brian Hann wrote:
> >>
> >> Nope, not yet (well, it did before).  I can unload it manually, but
> >> I'm not sure how to make that permanent - I tried make menuconfig,
> >> but it bombed.  Also, not sure why it's being loaded (cx8800).
> >> Thanks for chiming in, though - helps to get to the bottom of this.
> >
> > Do you have your /usr/src/linux symlink pointing to the correct source
> > directory, and did you run "makemenuconfig" from that directory  ??
> >
> > You could rmmod the module with a line in rc.local (if your distro
> > runs that way). I'm not really sure that it is causing me problems
> > though, azap gives me proper results and I can play the stream with
> > mplayer, I just get "too many packet" errors and azap loses lock at
> > times while playing, but never otherwise.
> >
> > It looks to me as if I have both an analog and a digital source for
> > the hd3000 card (/dev/ideox and /dev/dvb/adapterx), which everyone
> > seems to say you can't do.
> >
> > But too many other things to work out, getting the hd card working is
> > a low priority right now, as I have 3 other cap cards working OK.
> >
> > But on the original subject here, a very careful reading of your
> > bootup messages should reveal which card is which.
> To Brian
> You seem to be a little unclear about how things are supposed to work.
> No surprises in that! I'm still messing along and I bought my HD3000
> card last June!
>
> Re: the kernel
> You would only need to mess with compiling a kernel if your kernel had
> not been compiled originally with the modules we are talking about. In
> that case, you would need the kernel-source. Since you
> installed/upgraded from ATRPMS, you would not likely have the kernel
> source, and so, of course, make menuconfig would crash. If you look in
> /usr/src/kernels/`uname -r` with ls -al you should see a  '.config'
> file. This lists all of the things which the kernel was told to either
> compile in, or make as modules.
>
> Since you *do* have a cx88_dvb module in /lib/modules, the question is
> already answered: the module was built. It would not exist unless the
> kernel was told to make it. And Axel Thimm is clearly seriously
> interested in multimedia stuff... so it makes sense that he would ensure
> that all of that would be enabled.
>
> Re: the cards and the modules.
>
> In Fedora, at least with my machines, it appears that the only way to
> make things permanent, is to add lines to rc.local. The following is
> what I have deduced from the way things appear to happen. I may be wrong
> but I don't think so. On boot, the Fedora kernel, at some point searches
> and, I guess, matches found hardware with the list in
> /lib/modules/your-kernel-here/modules.pcimap and loads the matching
> module. Unfortunately, that file seems to get automagically re-ordered
> without human intervention! I edited the file to put cx88-dvb ahead of
> cx8800 and cx88-blackbird, but it kept changing back.
>
> So I added lines to rc.local to force the unloading of any unwanted
> modules and the loading of the correct module. (Not sure, but I think
> that rc.local runs *before* modprobe.conf gets called.)
>
> Your lsmod seems to show that both the cx88-dvb module *and* the cx8800
> module are being loaded. This ~could~ be because the Divico card also
> uses/can use the cx88-dvb module. Unfortunately, lsmod does not tell us
> which hardware is using which module.
>
> Your comment that you thought that the pvr350 was turning up at
> /dev/video1 is important. I'm not at my mythbox, but IIRC, you should be
> able to see where the pvr card is loaded from the ivtv segment of dmesg.
> Dmesg will tell you whether the proper firmware is being loaded for each
> card. You may be able to tell which module is being loaded for the
> HD3000, but IIRC, it is rather obscure and hard to tell exactly which
> module is being used.
>
> In the meantime, I suggest that the only way for you to tell what is
> going on will be to remove all other cards but the HD3000  and comment
> out all card associated lines in modprobe.conf while you do some tests.
> Then, on a cold boot, check for what /dev entries are showing up, do an
> 'lsmod > test1', followed by 'rmmod cx88-blackbird', 'rmmod cx8800',
> modprobe -v cx88-dvb' and then another lsmod > test2. That will show you
> what you need to know. At that point you should also see the
> /dev/dvb/adapter0/dvr0 entry show up.
>
> If the HD3000 card IS then showing up at /dev/dvb/adapter0/dvr0, then
> put the lines into rc.local, uncomment the ivtv lines, shutdown, add the
> pvr card and reboot. The pvr should now show up at /dev/video0 in
> accordance with the 'alias char-major-81-0 ivtv' line.
> Then do the same with the bttv card and lines.... which I guess should
> be after ivtv in modprobe.conf.
> And that will confirm where each is supposed to go, and what each needs
> to load properly.
>
> Then remember to fire up mythtv-setup and set the names of the tuner
> cards in the order you want, and with a name which you can recognize.
> Also remember that if your cards only do analog, your lineups for that
> card can only be analog channels. And it helps to make your most
> finicky  card the first card you enter in  mythtv-setup (in your case,
> like mine, probably the HD3000). This means that myth will choose
> another card (should be the pvr350) as the default card and that card is
> the easiest and most consistent to set up and tune. The HD3000 card at
> least, needs to have the modulation, mplexid, serviceid and other stuff
> set before it will actually tune... and that is sometimes difficult to
> get right, and when it fails you can end up with a black screeen and a
> stuck box. A default tuner/channel combination which always works, is 'a
> good thing'.
>
> HTH
>
> Geoff
>
>
>
>
>
>
>
> --
>        R. Geoffrey Newbury
>      Barrister and Solicitor
> Suite 106, 150 Lakeshore Road West
>     Mississauga, Ontario, L5H 3R2
>
>   905-271-9600  Fax 905-271-1638
>        newbury at mandamus.org
>
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>

I appreciate the time you put into this e-mail.  This seems like a weak spot
in linux; I'm suprised it exists!
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