[linux-dvb] Howto automatically load saa7134-dvb?

Juergen Orschiedt jorschiedt at web.de
Mon Mar 13 23:28:56 CET 2006


On Monday 13 March 2006 21:55, Johannes Stezenbach wrote:
> On Mon, Mar 13, 2006, Ole Reinartz wrote:
> > I'm struggling to automate the loading of saa7134-dvb for my Avermedia
> > 777. I'm using Jose Alberto Reguero's patch to get the 777 working, and
> > it is working well. However, whenever the system starts up, it detects
> > the card and loads the saa7134 module, but not the saa7134-dvb. After I
> > modprobe this module, everything is ok.
> > Is that working automatically at someones system? How can that be done?
> >
> > Now I searched the source for a reason and found out that someone
> > (probably Gerd Knorr himself) added a mechanism to load the saa7134-dvb
> > from the saa7134 whenever that detects a dvb- card.
> > The saa7134-dvb is dependent on saa7134, so it cannot be loaded while
> > the saa7134 itself is being loaded. So the code registers a notifier to
> > get notified after it got 'live' (i.e. its state changed to
> > MODULE_STATE_LIVE) I guess. And this notifier never gets called.
> > Looking in module.c (of kernel 2.6.15, which is the kernel I use) I find
> > that in sys_init_module() the notification mechanism is called only
> > before the module actually gets initialised, but not after that. That
> > confuses me a bit. Does someone know how this is going to work? Can the
> > module somehow act at the time it got 'live'?
>
> Well, I reported a bug (modprobe saa7134 deadlocked) which
> lead to some discussion on lkml and finally Gerd's changes.
> I suggest you look up the date of Gerd's change from the
> hg or cvs history, and then search for the lkml discussion
> around that time. Probably a piece of code from the module
> notification stuff went missing. It would be nice to get
> this fixed.
>

I used modprobe.d/tv config file to work around this issue:
install saa7134 /sbin/modprobe --first-time --ignore-install saa7134 && 
{ /sbin/modprobe saa7134-dvb && /sbin/modprobe saa7134-alsa || :; }

Cheers,
Juergen



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