mythbuntu-bugs team mailing list archive

[Thomas Mashos <1333207@xxxxxxxxxxxxxxxxxx>]

We really do appreciate you opening this ticket to help improve
Mythbuntu, but it needs to be closed for a number of reasons. The
biggest one is that upstream has moved on to a new version and believes
this to be fixed. Could you please verify if this issue still exists in
the latest version?

Please do not let the closing of this ticket dissuade you from opening a
new ticket if this (or any other) problem occurs with the newer
versions.

** Changed in: mythbuntu
       Status: New => Expired

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https://bugs.launchpad.net/bugs/1333207

Title:
  dvb-t tuner produces lots of UNC and bad MPEG streams randomly (1/2 of
  the times, but not deterministic)

Status in Mythbuntu, Ubuntu derivative focused upon MythTV:
  Expired

Bug description:
  Tuning of some dvb-t channels produces bad MPEG streams pseudo-
  randomly.

  Consecutively tuning several times to the same channel results in 1/2
  of the time channel lock with almost 0 UNC and 1/2 of the time with
  high rates of UNC. That second scenario makes the mpeg stream
  unwatchable (even no output in dvr0 most of the time)

  A sequence of "tzap -r channel_name" results in a cycle of OK/KO tuning results. After an "OK" tuning (no BER, no UNC, signal level aprox 0x6600)
  I always get a "KO" tuning (high BER, high UNC, signal level aprox 0x7700)

  Note that "pseudo-randomly" means that sometimes it doesn't happen at
  all but, when it happens, you always get the 50%-50% KO-OK sequence.
  Unfortunatelly, I'm not able to reproduce it on demand, it depends on
  some unknown conditions.

  Additional information:

  Channel example (this specific channel -Spain DVB-T- in channels.conf
  (tzap) format

  Antena3
  HD:578000000:INVERSION_AUTO:BANDWIDTH_8_MHZ:FEC_2_3:FEC_AUTO:QAM_64:TRANSMISSION_MODE_8K:GUARD_INTERVAL_1_4:HIERARCHY_NONE:501:503:148

  $ lsb_release -a
  No LSB modules are available.
  Distributor ID:	Ubuntu
  Description:	Ubuntu 12.04.4 LTS
  Release:	12.04
  Codename:	precise

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