[linux-dvb] Re: Full featured DVB-T card update

[Nils Ohlmeier <nils.ohlmeier@web.de>]

On Tuesday 05 August 2003 12:23, Juergen Peitz wrote:
> On Tuesday 05 August 2003 11:07, Nils Ohlmeier wrote:
> > Aug  5 10:40:51 [kernel] dvb_bend_frequency
> > Aug  5 10:40:51 [kernel] sp8870_set_frontend: firmware lockup!
> > Aug  5 10:40:51 [kernel] sp8870_set_frontend: Delay (850 usec)
> >
> > I did not saw a "..: firmware lockup recovered *" message yet.
>
> Strange after a "... firmware lockup!" message a "fimware recovered!" or
> "... firmware chrash!!!!" message should follow. Will have a look at the
> patch again.

It is strange. I still did not had a "recovered" or "crash" message. From a 
first rough look at your code i also do not understand how this can happen.

> > If i did not mentioned
> > it yet, the "hangup during watching" happens only on one frequency
> > (658MHz, Sat1, Pro7,...) too me.
>
> This is another problem my patch can't help here. If you don't get
> "dvb_frontend_recover" messages before the hangups I don't know what could
> be the cause for this. May be we should find more about the lockups while
> channel switching first?

Yes, sure.

> > Should i enable debug also on dvb-ttpci ? :-)
>
> Don't think this would help on the channel switching problem. If we only
> want to test this more first, you can also remove "dvb_frontend_debug=1",
> then it might be easier to follow the albs_tdlb7 messages.
>
> Please test again channel switching and if you get " ...recovered!" or "...
> chrashed!!!!" messages after a "...lockup" message.
> May be you could also try different values for MAXCHECKS (e.g. 50 or 150).

I increased MAXCHECKS to 150, but until now it doesnt changed anything.

Yesterday i had the first completed lock-up after a long time. The log looks 
like this:

Aug  6 23:04:18 [kernel] sp8870_set_frontend: Delay (0 usec)
                - Last output repeated 49 times -
Aug  6 23:04:28 [kernel] sp8870_set_frontend: Delay (30 usec)
Aug  6 23:04:28 [kernel] sp8870_set_frontend: Delay (0 usec)
                - Last output repeated 54 times -
Aug  6 23:04:51 [kernel] sp8870_set_frontend: Delay (20 usec)
Aug  6 23:04:52 [kernel] sp8870_set_frontend: Delay (0 usec)
                - Last output repeated 10 times -
Aug  6 23:04:55 [kernel] sp8870_set_frontend: firmware lockup!
Aug  6 23:04:55 [kernel] sp8870_set_frontend: Delay (50 usec)
Aug  6 23:04:56 [kernel] sp8870_set_frontend: firmware lockup!
                - Last output repeated 52 times -

I have a question to the people with switching problems: how fast do you 
switch the channels?
I had the complete lock-up after switching many channels very fast (i switched 
to the next channel after seeing the first picture or the on-screen 
tv-program). Normaly i do not switch that fast. So maybe the lock-ups are 
related to the switching speed?!

Greetings
  Nils



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