[linux-dvb] Re: Problem with AverMedia DVB-T card

["Mark Edwards" <mark@edwards.homelinux.net>]

Hi Joni,

I'm probably going to have to defer to the more extensive experience of
others on this list such as Holger. Right about now, I would myself be
trying different modulation parameters in intial.h to bootstrap different
results out of scan, however this suggestion would not be based on anything
other than a desparate attempt to clutch at straws. As you can appreciate
support for this driver is pretty early and there is evidently something not
quite right at the moment - especially if you are having success under
Win98. This obviously indicates that your signal is OK, despite current
indications from tzap.

Does your windows tuner application have the ability to display any of the
frequency information it is using, and can you confirm that this is the same
as the frequency information you are passing to tzap?

Mark.

----- Original Message -----
From: Joni Loponen <joni.loponen@auriamail.net>
To: Mark Edwards <mark@edwards.homelinux.net>
Sent: Wednesday, September 10, 2003 11:04 PM
Subject: Re: [linux-dvb] Problem with AverMedia DVB-T card


> On Wed, 2003-09-10 at 01:27, Mark Edwards wrote:
> > This looks possible like something is missing in in the v4l support for
the
> > 2.6.0 kernel tree. I have not done any work on 2.6.0 as I am still
running
> > 2.4.22 kernel. Despite all the error messages, it looks like
> > adapter0/frontend0 is firing up OK, however the signal parameters coming
> > back from the tuner don't look all that healthy. Signal is down and the
> > error rates are maxed out. You won't be getting anything remotely like
an
> > MPEG 2 stream from this signal.
> >
> > I would firstly check your modulation parameters and then run scan
again.
> > What other transponder information do you have?
>
> In dvb-kernel/apps/scan/initial.h is an entry for Espoo A-mux. Here in
> Turku the same A-mux should be at 714 MHz.
>
> Here is the frequencies I used:
> http://www.digitv.fi/sivu.asp?path=1;2999;3751 (In finnish)
>
> Here is the other information like guard interval:
> http://www.digitag.org/dttmaps/countries/finland.htm
>
> Seems like Espoo A-mux entry is the same except the frequency. I also
> tried B- and C-mux frequencies, but the results were the same with scan
> and tzap.
>
> > You will want to try and
> > confirm that the transponder information you are using is accurate and
that
> > you are getting a decent signal coming into the card. Do you have any
way of
> > confirming that the card is OK (i.e. a windows box and windows drivers?)
> The card works with Windows 98SE. There is a file named FreqTbl.tbl that
> contains channel information, but I didn't get anything else than
> channel names out from it.
>
> --
> Joni Loponen
>
> joni.loponen@auriamail.net
>
> > ----- Original Message -----
> > From: "Joni Loponen" <joni.loponen@auriamail.net>
> > To: <linux-dvb@linuxtv.org>
> > Sent: Wednesday, September 10, 2003 4:53 AM
> > Subject: [linux-dvb] Problem with AverMedia DVB-T card
> >
> >
> > > Hi,
> > > I've tried to use AverMedia DVB-T card in Linux, but I didn't get
> > > working.
> > > Here is what I've done:
> > >
> > > 1. Added necessary files from DVB-kernel CVS to Linux kernel 2.6-test4
> > > 2. Added kernelconfig for SP887X/Microtune 7202DTF
> > > 3. Applied the pathes in
> > > dvb-kernel/linux/drivers/media/dvb/bt8xx/patches directory (seems like
> > > Nebula patch is already added to bttv in this kernel) and made
> > > Nebula-like addtions for AverMedia DVB-T
> > > 4. Removed #include "dvb_compat.h" from
> > > dvb-kernel/linux/drivers/media/dvb/frontends/sp887x.c (Caused some
> > > compile errors)
> > >
> > >
> > > After compiling kernel I added a new initial transponder and tried to
> > > scan for channels:
> > > # ./scan
> > > using '/dev/dvb/adapter0/frontend0' and '/dev/dvb/adapter0/demux0'
> > > >>> tune to:
> > >
> >
714000000:INVERSION_OFF:BANDWIDTH_8_MHZ:FEC_2_3:FEC_NONE:QAM_64:TRANSMISSION
> > _MODE_8K:GUARD_INTERVAL_1_8:HIERARCHY_NONE
> > > WARNING: filter timeout pid 0x0011
> > > WARNING: filter timeout pid 0x0000
> > > WARNING: filter timeout pid 0x0010
> > > dumping lists (0 services)
> > > Done.
> > >
> > >
> > > Then I tried to add a station to ~/.tzap/channels manually and use
tzap
> > > to tune it:
> > > # tzap 1
> > > using '/dev/dvb/adapter0/frontend0' and '/dev/dvb/adapter0/demux0'
> > > tuning to 714000000 Hz
> > > status 1f | signal c0c0 | snr 4044 | ber ffffffff | unc ffffffff |
> > > FE_HAS_LOCK
> > > status 1f | signal c0c0 | snr 4044 | ber ffffffff | unc ffffffff |
> > > FE_HAS_LOCK
> > > status 1f | signal c0c0 | snr 4044 | ber ffffffff | unc ffffffff |
> > > FE_HAS_LOCK
> > > status 1f | signal c0c0 | snr 4044 | ber ffffffff | unc ffffffff |
> > > FE_HAS_LOCK
> > >
> > > Here is my parsed kernel dmesg:
> > > Linux video capture interface: v1.00
> > > bttv: driver version 0.9.11 loaded
> > > bttv: using 8 buffers with 2080k (520 pages) each for capture
> > > bttv: Host bridge is 0000:00:00.0
> > > bttv: Bt8xx card found (0).
> > > bttv0: Bt878 (rev 17) at 0000:01:08.0, irq: 7, latency: 32, mmio:
> > > 0xe4000000
> > > bttv0: detected: AverMedia DVB-T [card=105], PCI subsystem ID is
> > > 1461:0761
> > > bttv0: using: BT878(AverMedia DVB-T) [card=105,autodetected]
> > > PM: Adding info for No Bus:i2c-0
> > > bttv0: using tuner=-1
> > > videodev: "BT878(AverMedia DVB-T)" has no release callback. Please fix
> > > your driver for proper sysfs support, see
http://lwn.net/Articles/36850/
> > > bttv0: registered device video0
> > > videodev: "bt848/878 vbi" has no release callback. Please fix your
> > > driver for proper sysfs support, see http://lwn.net/Articles/36850/
> > > bttv0: registered device vbi0
> > > bttv0: PLL: 28636363 => 35468950 .. ok
> > > tvaudio: TV audio decoder + audio/video mux driver
> > > tvaudio: known chips:
> > >
> >
tda9840,tda9873h,tda9874h/a,tda9850,tda9855,tea6300,tea6420,tda8425,pic16c54
> > (PV951),ta8874z
> > > bt878: AUDIO driver version 0.0.0 loaded
> > > bt878: Bt878 AUDIO function found (0).
> > > bt878(0): Bt878 (rev 17) at 01:08.1, irq: 7, latency: 32, memory:
> > > 0xe4001000
> > > DVB: registering new adapter (Avermedia DVB-T).
> > > DVB: registering frontend 0:0 (Microtune MT7072DTF)...
> > > bt878 debug: bt878_start (ctl=04004020)
> > >
> > > .........
> > >
> > > i2c /dev entries driver module version 2.7.0 (20021208)
> > > PM: Adding info for No Bus:i2c-1
> > > i2c_adapter i2c-1: nForce2 SMBus adapter at 0x5000
> > > PM: Adding info for No Bus:i2c-2
> > > i2c_adapter i2c-2: nForce2 SMBus adapter at 0x5100
> > >
> > > .........
> > >
> > > i2c_adapter i2c-0: sendbytes: error - bailout.
> > > sp887x_initial_setup: firmware upload... done.
> > >
> > >
> > > I've probably done something wrong with i2c adapter things, right?
> > > Any help?
> > >
> > > --
> > > Joni Loponen
> > >
> > > joni.loponen@auriamail.net
> > >
> > >
> > >
> > >
> > > --
> > > Info:
> > > To unsubscribe send a mail to ecartis@linuxtv.org with "unsubscribe
> > linux-dvb" as subject.
> > >
> > >
> >
>
>



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