[linux-dvb] need to hold fronend device open

Iilluzion Shadow iilluzion at gmail.com
Tue Dec 4 08:10:26 CET 2007


Hi there!
I appreciated for good staff you develop.

The question is:
is it a bug or feature that to be able to have dvbnet device
operational to be able to get traffic i need to have frontend device
to be held open by a user process?

env:
  dvb card: TT-budget S-1401
  budget module from kernel 2.6.22
  linuxtv-dvb-apps-1.1.1

OK. some examples.

successful example 1
1. szap -n 1    - successfully locks a signal and continually monitors
signal strength
  1.2 meanwhile [kdvb-fe-0] is being hold open
2. dvbnet        - successfully makes a dvb0_0 device
3. ifconfig       - successfully initializes dvb device
4. tcpdump    - gives traffic

unsuccessful example 2

1. szap -n 1 -x - lock a signal and stops
2,3. dvbnet and ifconfig - make dvb0_0
4. tcpdump - shows NO traffic

reason:  [kdvb-fe-0] is not being hold open
workaround: keep szap going placing it into background with &.
   szap -n 1 > /dev/null 2>&1 &

so it seems i have to keep [kdvb-fe-0] making szap running

what's wrong with my configuration?

thank you in advance.



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