Consistent DVB-T channel tuning problems / mythfrontend lock-up (SVN 8917)

[johan@…]

Hello all,

I am having terrible troubles getting DVB channels to tune in the latest SVN (8917). Mostly the trouble is with HD channels, in which case I never get to see any video, mythfrontend totally locks up with a black screen, but the backend continues to record.

In fact, it has been the case twice now where the backend has continued to record *after* the frontend had been forceably killed causing endless recording resulting in 80GB of mpg files that never seem to get expired by the backend - I've had a total 100% partition fill a couple times now.

I hope this not a duplicate of an existing ticket, but I don't think that there is currently anything open about this (forgive me if I missed it).

Anyway, I've done all the related informating gathering and attached to this ticket you will find the frontend and backend gdb.txt from the point at which the frontend stops responding (I entered LiveTV, an SD channel tuned, then I tried to change to another SD (yes, SD, not HD)), the frontend log and the backend log ("-v record").

Here's the contents of my gdbcommands for the frontend (backend was the same):

   handle SIGPIPE nostop noprint
   handle SIG33 nostop noprint
   set logging on
   set pagination off
   set args -l mythfrontend-debugging.log -v record,channel,siparser
   run
   thread apply all bt full
   set logging off

---

Configure command:

   ./configure --compile-type=debug --arch=athlon-xp --disable-joystick-menu 
     --prefix=/usr/local/mythtv --enable-dvb --dvb-path=/usr/include/ 
     --enable-xvmc --enable-proc-opt --enable-opengl-vsync --enable-dts --enable-dvd

Configure output:

  # Basic Settings
  Compile type     debug
  Compiler cache   yes
  DistCC           no
  Install prefix   /usr/local/mythtv
  CPU              x86 (athlon-xp)
  Big Endian       no
  MMX enabled      yes
  Vector Builtins  yes

  # Input Support
  Joystick menu    no
  lirc support     yes
  Video4Linux sup. yes
  ivtv support     yes
  FireWire support no
  DVB support      yes [/usr/include/]
  DBox2 support    yes
 
  # Sound Output Support
  OSS support      yes
  ALSA support     yes
  aRts support     no
  JACK support     no
  DTS passthrough  yes

  # Video Output Support
  x11 support      yes
  xrandr support   yes
  xv support       yes
  XvMC support     yes
  XvMC VLD support yes
  XvMC pro support no
  XvMC libs        -lXvMCW
  OpenGL vsync     yes
  DirectFB         no

  # Misc Features
  DVD playback     yes
  Frontend         yes
  Backend          yes

---

A bit about my system:

  AMD Athlon(TM) XP 2600+
  512MB RAM
  Happauge NOVA-T DVB-T PCI card

---

Need anything else?

Johan.

[johan@…]

Frontend log at channel change.

[johan@…]

Frontend log at channel change.

[johan@…]

Backend trace shortly after getting the trace from the frontend

[johan@…]

Frontend trace at channel change

[johan@…]

Obviously the description for mythbackend-debugging.log should be "*Backend* log at channel change". Oops.

[danielk]

Duplicate [906].

[johan@…]

Fair enough if you think it's the same problem.

I'll just mention though that I cannot watch LiveTV *at all* with SVN 9023. Sometimes I can ESC back to the main menu, but other times I have to forcibly kill the frontend.

Oh well, hopefully you can use all the debugging info I produced as ticket 906 doesn't seem to have nearly enough information.