[linux-dvb] LifeView TV Walker Twin DVB-T (LR540) Problem

Christian Hack christian at hack.id.au
Thu Sep 25 04:24:16 CEST 2008


> -----Original Message-----
> From: linux-dvb-bounces at linuxtv.org 
> [mailto:linux-dvb-bounces at linuxtv.org] On Behalf Of Christian Hack
> Sent: Thursday, 22 May 2008 12:57 PM
> To: 'Nick Andrew'
> Cc: linux-dvb at linuxtv.org
> Subject: Re: [linux-dvb] LifeView TV Walker Twin DVB-T (LR540) Problem
> 
> > -----Original Message-----
> > From: Nick Andrew [mailto:nick-linuxtv at nick-andrew.net] 
> > Sent: Wednesday, 21 May 2008 11:26 PM
> > 
> > On Mon, May 19, 2008 at 07:00:27PM +1000, Christian Hack wrote:
> > > Hi guys,
> > > > I can't get any extra info with debug=1. I have tried in both
> /etc/modprobe.conf and by specifying it on the command line 
> i.e. "modprobe
> dvb_usb_m920x debug=1" etc. I am removing dvb_usb tda827x and 
> dvb_usb_m920x
> modules before trying each time.
> 
> Tzap output (first go is the LR540, second is the Hauppage 
> Nova-T) using the
> same aerial:
> 
> [root at mythtv tmp]# tzap -c channels.conf -a 2 -f 0 -d 0 "Ten HD"
> using '/dev/dvb/adapter2/frontend0' and '/dev/dvb/adapter2/demux0'
> tuning to 219500000 Hz
> video pid 0x0202, audio pid 0x0000
> status 00 | signal b8b8 | snr c8c8 | ber 0001fffe | unc 00000000 | 
> status 00 | signal b8b8 | snr d5d5 | ber 0001fffe | unc 00000000 | 
> status 00 | signal b7b7 | snr d3d3 | ber 0001fffe | unc 00000000 | 
> status 00 | signal b7b7 | snr d4d4 | ber 0001fffe | unc 00000000 | 
> 
After some playing when this original occurred, it started to work just fine
and continued working fine (even over reboots etc). So I left it for a while

The other day it started to play up again. Since I have some time I invested
more time in debugging the problem. This is what I'm seeing in the debug
log. I had to modify rsyslog's config to get this. This is interspersed with
the output from tzap:

[root at mythtv ~]# tzap -c channels.conf -a 2 -f 0 -d 0 "Ten HD"
using '/dev/dvb/adapter2/frontend0' and '/dev/dvb/adapter2/demux0'
Sep 25 12:20:58 mythtv kernel: power control: 1
Sep 25 12:20:58 mythtv kernel: tda1004x: setting up plls for 48MHz sampling
clock
tuning to 585625000 Hz
video pid 0x00a1, audio pid 0x0051
Sep 25 12:21:00 mythtv kernel: tda1004x: found firmware revision 29 -- ok
Sep 25 12:21:00 mythtv kernel: tda827x: tda827x_init:
Sep 25 12:21:00 mythtv kernel: tda827x: tda827xa_set_params:
Sep 25 12:21:00 mythtv kernel: tda827x: tda827x_config not defined, cannot
set LNA gain!
Sep 25 12:21:00 mythtv kernel: tda827x: tda8275a AGC2 gain is: 0
Sep 25 12:21:00 mythtv kernel: tda827x: tda827x_config not defined, cannot
set LNA gain!
status 00 | signal a2a2 | snr c2c2 | ber 0001fffe | unc 00000000 | 
Sep 25 12:21:02 mythtv kernel: tda827x: tda827xa_set_params:
Sep 25 12:21:02 mythtv kernel: tda827x: tda827x_config not defined, cannot
set LNA gain!
Sep 25 12:21:02 mythtv kernel: tda827x: tda8275a AGC2 gain is: 0
Sep 25 12:21:02 mythtv kernel: tda827x: tda827x_config not defined, cannot
set LNA gain!
status 00 | signal a1a1 | snr d4d4 | ber 0001fffe | unc 00000000 | 
Sep 25 12:21:03 mythtv kernel: tda827x: tda827xa_set_params:
Sep 25 12:21:03 mythtv kernel: tda827x: tda827x_config not defined, cannot
set LNA gain!
Sep 25 12:21:03 mythtv kernel: tda827x: tda8275a AGC2 gain is: 0
Sep 25 12:21:03 mythtv kernel: tda827x: tda827x_config not defined, cannot
set LNA gain!
Sep 25 12:21:05 mythtv kernel: tda827x: tda827xa_set_params:
Sep 25 12:21:05 mythtv kernel: tda827x: tda827x_config not defined, cannot
set LNA gain!
status 00 | signal a1a1 | snr d6d6 | ber 0001fffe | unc 00000000 | 

This lines up with what I'm seeing i.e. it can't seem to tune correctly.
Tda827x doesn't seem to have any configuration options. Suggestions?
Remember this system did work previously.

CH




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