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

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

[Christian Hack]

Hi guys,

I've got one of these that has been successfully working on my MythDora
(based on Fedora 8) machine for the past few months. It didn't ever scan
properly though. I was able to use my other cards to populate the channel
list. Once the channels were set up, it worked perfectly.

All of sudden it seems to have stopped working. Using dvbtune it is unable
to lock on to a signal. In MythTV I just get a garbled mess like a very bad
signal. The audio is almost intelligble, video is a mess.

The firmware is in the right spot (as it was working before). I even
downloaded it again to check it hadn't somehow corrupted. As far as I am
aware nothing has changed (well it must have since it's not working).

Unplugging it and using it on my WinXP laptop it seems to work fine. So the
hardware, cabling etc should alright.

I'm not real sure what to try now. I can't seem to get the debug options
with the kernel modules to work properly. I'm not getting any extra info
output that I can see i.e. I'm doing this:
modprobe dvb_usb debug=511
modprobe dvb_usb_m920x debug=1
Is that right?

>From /var/log/messages it all looks ok. (I have to Hauppage PCI Nova-Ts that
are running just fine)

May 19 18:52:16 mythtv kernel: dvb-usb: found a 'LifeView TV Walker Twin
DVB-T USB2.0' in warm state.
May 19 18:52:16 mythtv kernel: dvb-usb: will pass the complete MPEG2
transport stream to the software demuxer.
May 19 18:52:16 mythtv kernel: DVB: registering new adapter (LifeView TV
Walker Twin DVB-T USB2.0)
May 19 18:52:16 mythtv kernel: DVB: registering frontend 2 (Philips
TDA10046H DVB-T)...
May 19 18:52:16 mythtv kernel: dvb-usb: will pass the complete MPEG2
transport stream to the software demuxer.
May 19 18:52:16 mythtv kernel: DVB: registering new adapter (LifeView TV
Walker Twin DVB-T USB2.0)
May 19 18:52:16 mythtv kernel: DVB: registering frontend 3 (Philips
TDA10046H DVB-T)...
May 19 18:52:16 mythtv kernel: input: IR-receiver inside an USB DVB receiver
as /class/input/input12
May 19 18:52:16 mythtv kernel: dvb-usb: schedule remote query interval to
100 msecs.
May 19 18:52:16 mythtv kernel: dvb-usb: LifeView TV Walker Twin DVB-T USB2.0
successfully initialized and connected.
May 19 18:52:16 mythtv kernel: usbcore: registered new interface driver
dvb_usb_m920x

Any ideas or suggestions on where to look in terms of debugging?

Whilst I'm here is there anyway to force DVB frontend ids? It seems to
randomly order them i.e. sometimes 1 and 3 are the Nova-Ts, sometimes they
are 0 and 1 etc...

Thanks
CH


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

[Nick Andrew]

On Mon, May 19, 2008 at 07:00:27PM +1000, Christian Hack wrote:
> Hi guys,
> 
> I've got one of these that has been successfully working on my MythDora
> (based on Fedora 8) machine for the past few months. It didn't ever scan
> properly though. I was able to use my other cards to populate the channel
> list. Once the channels were set up, it worked perfectly.
> 
> All of sudden it seems to have stopped working.

What changed? If it's not a hardware problem, then something must have
changed. Kernel upgraded, USB cable intermittent, firmware file removed
or renamed, antenna blown off roof, etc...

I'm suspicious about when you say "didn't ever scan properly". Mine
didn't scan either. Then I connected it to a proper antenna, and it
scanned fine.

> Using dvbtune it is unable
> to lock on to a signal. In MythTV I just get a garbled mess like a very bad
> signal. The audio is almost intelligble, video is a mess.

Have you tried tzap? Please post output from tzap and also the kernel
log messages generated using debug=1 and while tzap is running.

Mine are still working - at least they were the last time we watched TV
which must have been a few weeks ago :-)

Nick.
-- 
PGP Key ID = 0x418487E7                      http://www.nick-andrew.net/
PGP Key fingerprint = B3ED 6894 8E49 1770 C24A  67E3 6266 6EB9 4184 87E7

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

[Christian Hack]

[-- Attachment #1: Type: text/plain, Size: 3583 bytes --]

> -----Original Message-----
> From: Nick Andrew [mailto:nick-linuxtv@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've got one of these that has been successfully working on 
> my MythDora
> > (based on Fedora 8) machine for the past few months. It 
> didn't ever scan
> > properly though. I was able to use my other cards to 
> populate the channel
> > list. Once the channels were set up, it worked perfectly.
> > 
> > All of sudden it seems to have stopped working.
> 
> What changed? If it's not a hardware problem, then something must have
> changed. Kernel upgraded, USB cable intermittent, firmware 
> file removed
> or renamed, antenna blown off roof, etc...

Nothing that I'm aware of had changed. No kernel change - not even a reboot.
Firmware file is OK. I certainly didn't even touch anything physically.
Antenna is in the roof. I totally understand the concept that something must
have changed though (I'm an engineer)

> I'm suspicious about when you say "didn't ever scan properly". Mine
> didn't scan either. Then I connected it to a proper antenna, and it
> scanned fine.

Well it's possible my signal isn't the best. I see something like 75%
reported in MythTV (not that I see it much since I don't watch Live TV
often). I'm not that keen on upgrading/replacing it just yet. It does work
perfectly with the Two Hauppauge Nova-T PCI cards.

> > Using dvbtune it is unable
> > to lock on to a signal. In MythTV I just get a garbled mess 
> like a very bad
> > signal. The audio is almost intelligble, video is a mess.
> 
> Have you tried tzap? Please post output from tzap and also the kernel
> log messages generated using debug=1 and while tzap is running.

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@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 | 

[root@mythtv tmp]# tzap -c channels.conf -a 0 -f 0 -d 0 "Ten HD"
using '/dev/dvb/adapter0/frontend0' and '/dev/dvb/adapter0/demux0'
tuning to 219500000 Hz
video pid 0x0202, audio pid 0x0000
status 00 | signal c8c8 | snr ffff | ber 0001fffe | unc 00000000 | 
status 1f | signal c9c9 | snr ffff | ber 0000000e | unc 00000000 |
FE_HAS_LOCK
status 1f | signal c9c9 | snr fefe | ber 00000014 | unc 00000000 |
FE_HAS_LOCK
status 1f | signal c9c9 | snr fefe | ber 00000010 | unc 00000000 |
FE_HAS_LOCK
status 1f | signal c9c9 | snr ffff | ber 00000012 | unc 00000000 |
FE_HAS_LOCK

/var/log/messages is attached from a "modprobe dvb_usb_m920x" onwards. Of
the last two lines the first is the firmware load for the TDA10046 in the
LR540. The second is the load for the TDA10045 in the Nova-T. The only lines
that appear when tuning the LR540 are:

May 22 12:55:53 mythtv kernel: tda1004x: setting up plls for 48MHz sampling
clock
May 22 12:55:55 mythtv kernel: tda1004x: found firmware revision 29 -- ok

CH


[-- Attachment #2: var-log-messages.txt --]
[-- Type: text/plain, Size: 2745 bytes --]

May 22 12:41:23 mythtv kernel: dvb-usb: found a 'LifeView TV Walker Twin DVB-T USB2.0' in warm state.
May 22 12:41:23 mythtv kernel: dvb-usb: will pass the complete MPEG2 transport stream to the software demuxer.
May 22 12:41:23 mythtv kernel: DVB: registering new adapter (LifeView TV Walker Twin DVB-T USB2.0)
May 22 12:41:23 mythtv kernel: DVB: registering frontend 2 (Philips TDA10046H DVB-T)...
May 22 12:41:23 mythtv kernel: dvb-usb: will pass the complete MPEG2 transport stream to the software demuxer.
May 22 12:41:23 mythtv kernel: DVB: registering new adapter (LifeView TV Walker Twin DVB-T USB2.0)
May 22 12:41:23 mythtv kernel: DVB: registering frontend 3 (Philips TDA10046H DVB-T)...
May 22 12:41:23 mythtv kernel: input: IR-receiver inside an USB DVB receiver as /class/input/input17
May 22 12:41:23 mythtv kernel: dvb-usb: schedule remote query interval to 100 msecs.
May 22 12:41:23 mythtv kernel: dvb-usb: LifeView TV Walker Twin DVB-T USB2.0 successfully initialized and connected.
May 22 12:41:23 mythtv kernel: usbcore: registered new interface driver dvb_usb_m920x
May 22 12:41:28 mythtv kernel: usbcore: deregistering interface driver dvb_usb_m920x
May 22 12:41:28 mythtv kernel: dvb-usb: generic DVB-USB module successfully deinitialized and disconnected.
May 22 12:41:28 mythtv kernel: dvb-usb: LifeView TV Walker Twin DVB-T USB2.0 successfully deinitialized and disconnected.
May 22 12:42:29 mythtv kernel: dvb-usb: found a 'LifeView TV Walker Twin DVB-T USB2.0' in warm state.
May 22 12:42:29 mythtv kernel: dvb-usb: will pass the complete MPEG2 transport stream to the software demuxer.
May 22 12:42:29 mythtv kernel: DVB: registering new adapter (LifeView TV Walker Twin DVB-T USB2.0)
May 22 12:42:29 mythtv kernel: DVB: registering frontend 2 (Philips TDA10046H DVB-T)...
May 22 12:42:29 mythtv kernel: dvb-usb: will pass the complete MPEG2 transport stream to the software demuxer.
May 22 12:42:29 mythtv kernel: DVB: registering new adapter (LifeView TV Walker Twin DVB-T USB2.0)
May 22 12:42:29 mythtv kernel: DVB: registering frontend 3 (Philips TDA10046H DVB-T)...
May 22 12:42:29 mythtv kernel: input: IR-receiver inside an USB DVB receiver as /class/input/input18
May 22 12:42:29 mythtv kernel: dvb-usb: schedule remote query interval to 100 msecs.
May 22 12:42:29 mythtv kernel: dvb-usb: LifeView TV Walker Twin DVB-T USB2.0 successfully initialized and connected.
May 22 12:42:29 mythtv kernel: usbcore: registered new interface driver dvb_usb_m920x
May 22 12:42:39 mythtv kernel: tda1004x: setting up plls for 48MHz sampling clock
May 22 12:42:41 mythtv kernel: tda1004x: found firmware revision 29 -- ok
May 22 12:42:58 mythtv kernel: tda1004x: found firmware revision 2c -- ok

[-- Attachment #3: Type: text/plain, Size: 150 bytes --]

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

[Christian Hack]

> -----Original Message-----
> From: linux-dvb-bounces@linuxtv.org 
> [mailto:linux-dvb-bounces@linuxtv.org] On Behalf Of Christian Hack
> Sent: Thursday, 22 May 2008 12:57 PM
> To: 'Nick Andrew'
> Cc: linux-dvb@linuxtv.org
> Subject: Re: [linux-dvb] LifeView TV Walker Twin DVB-T (LR540) Problem
> 
> > -----Original Message-----
> > From: Nick Andrew [mailto:nick-linuxtv@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@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@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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