[linux-dvb] Lost lock problems over extended periods of time

Dominique Dumont domi.dumont at free.fr
Wed Jun 8 15:20:38 CEST 2005


Manu Abraham <manu at kromtek.com> writes:

> What i was wondering (a wild thought) was that, is something
> disturbing the frontend settings once it is set up ? That was the only
> way that a lock could be lost on the Twinhan cards, since i cannot
> logically think of any other reason that's what written to a register
> is lost. But that's too wild a thought.
>
> Dominique had a similar problem, but that was triggered off at a
> certain period of time nearing midnight on TPS, but could be something
> else too... Maybe he can test the same on the Twinhan DST-CI and see
> what's the effect..

In fact, when I tune my twinhan card, I do a 'szap szap -r -x ...'.

Which means that the thead created in the function patched by Andrew
(dvb_frontend_thread) is no longer active (I've verified this by
adding traces to the dvb_frontend_thread state machine):

Jun  8 15:06:55 gandalf kernel: dvb_frontend_thread: retune state
Jun  8 15:06:55 gandalf kernel: dvb_frontend_thread: retune -> tuning fast
Jun  8 15:06:56 gandalf kernel: dvb_frontend_thread: waiting_for_lock -> tuned
Jun  8 15:06:57 gandalf kernel: dvb_frontend_thread: tuned
Jun  8 15:06:58 gandalf kernel: dvb_frontend_thread: tuned
Jun  8 15:06:58 gandalf kernel: dvb_frontend_thread: tuned
Jun  8 15:06:58 gandalf kernel: dvb_frontend_thread: tuned
Jun  8 15:06:58 gandalf kernel: dvb_frontend_thread: tuned
Jun  8 15:06:58 gandalf kernel: dvb_frontend_thread: tuned
Jun  8 15:06:59 gandalf kernel: dvb_frontend_thread: tuned
Jun  8 15:06:59 gandalf kernel: dvb_frontend_thread: tuned
Jun  8 15:07:00 gandalf kernel: dvb_frontend_thread: tuned
Jun  8 15:07:01 gandalf kernel: dvb_frontend_thread: tuned
Jun  8 15:07:01 gandalf kernel: dvb_frontend_thread: exiting

Besides, when decryption fails, data is still flowing from the dvb
card so I don't think that a lock problem triggers the decryption
failure.

Cheers




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