[linux-dvb] Re: Technotrend DVB-T 1.2 recommended for UK?

[Adrian P Challinor]

have it back and ready to try in a day or so.

 

I think this thread went quiet with out anyone answering Andy’s
questions: To reiterate – has anyone got the TT DVB-T 1.2 card working
fine, or not? If not, is there an alternative full featured TT-DVB-T card on
offer (Hauppauge may have a Nexus-T, I found one reference to it, but nowhere I
could buy one L.

 

 

Adrian


 

 

>Thanks for everyone who has shown interest in my post. I was quite
impressed at how it has snowballed into a conversion about possible fixes! As >Gregor
said, I don't have the option of misusing a full featured Sat card, because I
don't have a sat feed. I think I might as well get the TT DVB 1.2 >anyway,
because if it the problems arn't solved I should still be able to 'misuse' it
with a Nova-T? So I'll buy one and join in the discussion. Just a >couple of
quick questions though: 
>
>1) How hot does it get? Is it like a 1.3 sat card and roasts?
>2) Anyone with a happily working full feature card of any variety got it
working stabily with a mini-itx motherboard? (if I do decide to get a hush)
>
>Cheers,
>Andy

[linux-dvb] Re: Technotrend DVB-T 1.2 recommended for UK?

[Nils Ohlmeier]

On Monday 14 July 2003 10:22, Juergen Peitz wrote:
> On Sunday 13 July 2003 23:50, Nils Ohlmeier wrote:
> > On Tuesday 08 July 2003 13:23, Johannes Stezenbach wrote:
> > > Ragnar Sundblad wrote:
> > > > >+  /* read status reg in order to clear pending irqs */
> > > > >+  sp8870_readreg(i2c, 0x200);
> > > >
> > > > I have now done a little testing, and it really does seem that
> > > > that pending irq clearing makes a difference!
> > > >
> > > > Without it, I get a frontend hang of the kind that can be
> > > > resolved by changing channel (freqency) in one of maybe 20
> > > > channel switches.
> > > > With it, I don't think that kind of hang ever occurs for me.
> > >
> > > I comitted this change to CVS (untested, I don't have a DVB-T card
> > > a hand right now). Lets see if it works for other people, too.
> >
> > sorry guys, but the removeale of the line above completely breaks my
> > tuning
>
> Don't understand? This line was added and not removed!

Ok, sorry. I did not read the diff output carefully enough. The new line 
breaks my tuning :-(

Greets
  Nils



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[linux-dvb] Re: Technotrend DVB-T 1.2 recommended for UK?

[Juergen Peitz]

On Sunday 13 July 2003 23:50, Nils Ohlmeier wrote:
> Hi,
>
> On Tuesday 08 July 2003 13:23, Johannes Stezenbach wrote:
> > Ragnar Sundblad wrote:
> > > >+/* read status reg in order to clear pending irqs */
> > > >+sp8870_readreg(i2c, 0x200);
> > >
> > > I have now done a little testing, and it really does seem that
> > > that pending irq clearing makes a difference!
> > >
> > > Without it, I get a frontend hang of the kind that can be
> > > resolved by changing channel (freqency) in one of maybe 20
> > > channel switches.
> > > With it, I don't think that kind of hang ever occurs for me.
> >
> > I comitted this change to CVS (untested, I don't have a DVB-T card
> > a hand right now). Lets see if it works for other people, too.
>
> sorry guys, but the removeale of the line above completely breaks my tuning

Don't understand? This line was added and not removed!

Juergen


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[linux-dvb] Re: Technotrend DVB-T 1.2 recommended for UK?

[Nils Ohlmeier]

Hi,

On Tuesday 08 July 2003 13:23, Johannes Stezenbach wrote:
> Ragnar Sundblad wrote:
> > >+  /* read status reg in order to clear pending irqs */
> > >+  sp8870_readreg(i2c, 0x200);
> >
> > I have now done a little testing, and it really does seem that
> > that pending irq clearing makes a difference!
> >
> > Without it, I get a frontend hang of the kind that can be
> > resolved by changing channel (freqency) in one of maybe 20
> > channel switches.
> > With it, I don't think that kind of hang ever occurs for me.
>
> I comitted this change to CVS (untested, I don't have a DVB-T card
> a hand right now). Lets see if it works for other people, too.

sorry guys, but the removeale of the line above completely breaks my tuning 
:-(
This means with the latest code from CVS (where the line above is removed) my 
frontend does not get a permanent lock on any channel or frequency. I only 
see lots of MPEG squares, but the picture is never getting stable (sound 
too).
Without my patch (described in another mail to list a few days ago) i saw this 
MPEG squares for several seconds, before i got a stable  picture and sound. 
But without the line above i never (several minutes) do not get a stable 
picture or sound.

Can please someone reinsert the above line? Otherwise i have to start to 
maintain my own version of alps_tdlb7.c which works for my frontend.

Greetings
  Nils Ohlmeier



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[linux-dvb] Re: Technotrend DVB-T 1.2 recommended for UK?

[Gregor Lawatscheck]

At 23:36 10/07/2003, you wrote:
> >
> > I will now try Johannes' suggestion of rolling back to the older 0.94
> > driver (if I can work out where to download it from?)
>
> I never suggested that.
>
I'm sorry, it was actually Juergen Peitz.  I have a problem applying his
patch to the code, probably user error, but I will persevere
I was suggesting Guido Fiala's patch to vdr / driver to use 0.9.4
http://www.s.netic.de/gfiala/vdr-backport-0.9.4driver.tgz
see
http://www.linuxtv.org/mailinglists/vdr/2003/06-2003/msg01579.html
He added a few hints on using it:
http://www.linuxtv.org/mailinglists/vdr/2003/06-2003/msg01581.html 



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[linux-dvb] Re: Technotrend DVB-T 1.2 recommended for UK?

[Edward Wildgoose]

> >
> > I will now try Johannes' suggestion of rolling back to the older 0.94
> > driver (if I can work out where to download it from?)
>
> I never suggested that.
>

I'm sorry, it was actually Juergen Peitz.  I have a problem applying his
patch to the code, probably user error, but I will persevere

> AFAIK the problem are bugs in the demodulator firmware binary
> (Sc_main.mc). If this is true then you should be able to reproduce
> the error under Windows, and complain to Technotrend/Hauppauge until
> they give you a working card or driver. If it works in Windows (with the
> same Sc_main.mc as used under Linux), someone has to find out what the
> Windows drivers do differently, maybe be using an I2C sniffer.
>

Nope, windows driver dies in the same 4-5 channel changes.

> I guess that unless it is confirmed that the Windows driver works
> flawlessly no one will spend any time trying to improve the Linux
> driver.

Seems fair enough

I will drop another line to Hauppauge.  They never wrote back to my last
email though...

Thanks for the interest everyone

Ed



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[linux-dvb] Re: Technotrend DVB-T 1.2 recommended for UK?

[Edward Wildgoose]

> > I have just checked out the latest CVS and made sure that the above
patch
> > was included.  Unfortunately is has made no difference to my tuning
> > problems at all.  I still see the card appear to give up tuning anymore
> > after 3-6 channel changes.
> >
> > I will now try Johannes' suggestion of rolling back to the older 0.94
> > driver (if I can work out where to download it from?)
>
> Arrrg! I know you have tried it before, but maybe you should
> try the rest of the patch too again, just to see if it suddenly
> decides to make any difference.
> I use the entire patch (now merged with the recent CVS addition),
> and I do think there is a difference with and without it,
> especially that "read pending interrupts" thing.
> I see this problem much more seldom than you do, so my tests
> probably aren't as good.

Hmm, well I had the whole patch in before and I don't notice any real
difference with the pending interrupts stuff at all (sadly)

> You may have told us already, if so I ask you to do it again:
> Does your card work any better with the windows driver?
> Maybe Juergen can suggest some more tests to do/registers to
> touch? Is it maybe timing related?

Nope, exactly the same with the windows driver.

I forgot to check, but it was more reliable in the past and I think it may
have been the older sc_main firmware which was better.  I will try the older
firmware again later, but it was still broken back then anyway (just not to
bad)

Thanks

Ed



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[linux-dvb] Re: Technotrend DVB-T 1.2 recommended for UK?

[Johannes Stezenbach]

Ed Wildgoose wrote:
> Johannes Stezenbach wrote:
> 
...
> >>>+  /* read status reg in order to clear pending irqs */
> >>>+  sp8870_readreg(i2c, 0x200);
...
> >I comitted this change to CVS (untested, I don't have a DVB-T card
> >a hand right now). Lets see if it works for other people, too.
...
> I have just checked out the latest CVS and made sure that the above 
> patch was included.  Unfortunately is has made no difference to my 
> tuning problems at all.  I still see the card appear to give up tuning 
> anymore after 3-6 channel changes.
> 
> I will now try Johannes' suggestion of rolling back to the older 0.94 
> driver (if I can work out where to download it from?)

I never suggested that.

AFAIK the problem are bugs in the demodulator firmware binary
(Sc_main.mc). If this is true then you should be able to reproduce
the error under Windows, and complain to Technotrend/Hauppauge until
they give you a working card or driver. If it works in Windows (with the
same Sc_main.mc as used under Linux), someone has to find out what the
Windows drivers do differently, maybe be using an I2C sniffer.

I guess that unless it is confirmed that the Windows driver works
flawlessly no one will spend any time trying to improve the Linux
driver.


Johannes


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[linux-dvb] Re: Technotrend DVB-T 1.2 recommended for UK?

[Ragnar Sundblad]

--On den 10 juli 2003 17:38 +0100 Ed Wildgoose <[EMAIL PROTECTED]> wrote:

I have just checked out the latest CVS and made sure that the above patch
was included.  Unfortunately is has made no difference to my tuning
problems at all.  I still see the card appear to give up tuning anymore
after 3-6 channel changes.
I will now try Johannes' suggestion of rolling back to the older 0.94
driver (if I can work out where to download it from?)
Arrrg! I know you have tried it before, but maybe you should
try the rest of the patch too again, just to see if it suddenly
decides to make any difference.
I use the entire patch (now merged with the recent CVS addition),
and I do think there is a difference with and without it,
especially that "read pending interrupts" thing.
I see this problem much more seldom than you do, so my tests
probably aren't as good.
You may have told us already, if so I ask you to do it again:
Does your card work any better with the windows driver?
Maybe Juergen can suggest some more tests to do/registers to
touch? Is it maybe timing related?
/ragge



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[linux-dvb] Re: Technotrend DVB-T 1.2 recommended for UK?

[Ed Wildgoose]

Johannes Stezenbach wrote:

Ragnar Sundblad wrote:
 

+		/* read status reg in order to clear pending irqs */
+		sp8870_readreg(i2c, 0x200);
 

I have now done a little testing, and it really does seem that
that pending irq clearing makes a difference!
Without it, I get a frontend hang of the kind that can be
resolved by changing channel (freqency) in one of maybe 20
channel switches.
With it, I don't think that kind of hang ever occurs for me.
   

I comitted this change to CVS (untested, I don't have a DVB-T card
a hand right now). Lets see if it works for other people, too.
 

Hi folks,

I have just checked out the latest CVS and made sure that the above 
patch was included.  Unfortunately is has made no difference to my 
tuning problems at all.  I still see the card appear to give up tuning 
anymore after 3-6 channel changes.

I will now try Johannes' suggestion of rolling back to the older 0.94 
driver (if I can work out where to download it from?)

Thanks for your help

Ed W



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[linux-dvb] Re: Technotrend DVB-T 1.2 recommended for UK?

[Gregor Lawatscheck]

At 13:58 09/07/2003, you wrote:
As Gregor said, I don't have the option of misusing a full featured Sat 
card, because I don't have a sat feed. I think I might as well get the TT 
DVB 1.2 anyway, because if it the problems arn't solved I should still be 
able to 'misuse' it with a Nova-T?
Good point. That holds true as long as those vertical lines on the TV out 
aren't specific to the full featured DVB-T 1.2. Not sure if that's all 
cards or just some.

You could still "misuse" a full featured sat or cable card, as is a patch 
to the current vdr to use it with the 0.9.4 drivers which don't mind a 
missing sat signal: See 
http://www.linuxtv.org/mailinglists/linux-dvb/2003/06-2003/msg00832.html 
and follow-ups. Rev 1.6 recommended as those don't get hot but have RGB 
output unlike the rev 2s (please correct me if I'm wrong).



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[linux-dvb] Re: Technotrend DVB-T 1.2 recommended for UK?

[Edward Wildgoose]

> discussion. Just a couple of quick questions though:
>
> 1) How hot does it get? Is it like a 1.3 sat card and roasts?

It gets really hot (burn you if you touch it).  But I think that the hot
bits may be limited to the top resistor above the tuner, and perhaps the
outside of the tuner shielding.  I haven't really touched all the bits to
see where the heat is coming from.

Ed



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[linux-dvb] Re: Technotrend DVB-T 1.2 recommended for UK?

[Andrew Dowsey]

At 18:11 08/07/2003 +0100, Edward Wildgoose wrote:
> I comitted this change to CVS (untested, I don't have a DVB-T card
> a hand right now). Lets see if it works for other people, too.
Thanks Johannes,

I will give this a try real soon.  My linux PC is in bits at the moment, but
I should have it back and ready to try in a day or so.
Thanks for everyone who has shown interest in my post. I was quite 
impressed at how it has snowballed into a conversion about possible fixes! 
As Gregor said, I don't have the option of misusing a full featured Sat 
card, because I don't have a sat feed. I think I might as well get the TT 
DVB 1.2 anyway, because if it the problems arn't solved I should still be 
able to 'misuse' it with a Nova-T? So I'll buy one and join in the 
discussion. Just a couple of quick questions though:

1) How hot does it get? Is it like a 1.3 sat card and roasts?
2) Anyone with a happily working full feature card of any variety got it 
working stabily with a mini-itx motherboard? (if I do decide to get a hush)

Cheers,
Andy


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[linux-dvb] Re: Technotrend DVB-T 1.2 recommended for UK?

[Edward Wildgoose]

> I comitted this change to CVS (untested, I don't have a DVB-T card
> a hand right now). Lets see if it works for other people, too.

Thanks Johannes,

I will give this a try real soon.  My linux PC is in bits at the moment, but
I should have it back and ready to try in a day or so.

Fingers crossed, but lets hope that you have it cracked.

Many thanks for your interest, regardless!

Ed



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[linux-dvb] Re: Technotrend DVB-T 1.2 recommended for UK?

[Johannes Stezenbach]

Ragnar Sundblad wrote:
> 
> >+/* read status reg in order to clear pending irqs */
> >+sp8870_readreg(i2c, 0x200);
> 
> I have now done a little testing, and it really does seem that
> that pending irq clearing makes a difference!
> 
> Without it, I get a frontend hang of the kind that can be
> resolved by changing channel (freqency) in one of maybe 20
> channel switches.
> With it, I don't think that kind of hang ever occurs for me.

I comitted this change to CVS (untested, I don't have a DVB-T card
a hand right now). Lets see if it works for other people, too.

Thanks,
Johannes


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[linux-dvb] Re: Technotrend DVB-T 1.2 recommended for UK?

[Ragnar Sundblad]

--On den 8 juli 2003 02:27 +0200 Nils Ohlmeier <[EMAIL PROTECTED]> wrote:

It's no official patch from the list. When someone published the patch
which  considers the frequence i played around with the values. And i get
the best  result with the patch below (i know that i could remove the if
;).
I guess you are referring to my patch to make the frontend
more ALPS compliant.
I played around with the power and the diveder values quite
a lot when I had my previous power supply with the poor(er) 12V.
I could get slightly better results with another power/divider
setting on some frequencies, but settled with the ALPS
recommended one.
Note that you can get quite instable tuning and problems
tuning upwards or downwards and all other kinds of weird
behaviour if you change those values. Nils seems to have
found good values for him, but other experimenters should
keep this in mind!
This is what I mean with that the tuner voltage DC/DC
converter is a bad design on these cards - it is highly
dependant of the level and cleanliness of the 12V it gets,
the voltage has to be at least some 12,0V which is higher
than what is normally acceptable for a PC power supply, and
it doesn't seem to really keep up with load anyway.
I have been thinking of replacing that piece of circutry just
to see what happens, but I haven't got around to that yet.
/ragge

Greetings
  Nils
--- alps_tdlb7.c2003-07-08 02:19:51.0 +0200
+++ alps_tdlb7.c.new2003-07-08 02:18:47.0 +0200
@@ -148,9 +148,9 @@
int pwr;
if (freq <= 78200)
-   pwr = 1;
+   pwr = 3;
else
-   pwr = 2;
+   pwr = 3;
buf[0] = (div >> 8) & 0x7f;
buf[1] = div & 0xff;


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[linux-dvb] Re: Technotrend DVB-T 1.2 recommended for UK?

[Nils Ohlmeier]

On Monday 07 July 2003 23:34, Edward Wildgoose wrote:
> This sounds like exactly the problem that I have.  I can sometimes get it
> back doing the trick you mention, but not more often than 1 in 10 times.
> Usually it just dies permanently and only comes back when I reload the
> dvbtt-pci module

Soemtimes if the switch back do not help, i switch to some other channel which 
works almost any time. Then i wait until the OSD is gone and try the desired 
channel again.
It sounds silly, but i have the "feeling" that my frontend  can "stabilize" 
itself on this channels again.

> I'm interested in a reference to your patch for frontend taking a while to
> lock?  My card takes about the same time to lock (second or so) as my set
> top box, but it seems pretty slow to me, especially as the card is often
> already on the right multi-plex...
>
> Could you send me a link perhaps?

It's no official patch from the list. When someone published the patch which 
considers the frequence i played around with the values. And i get the best 
result with the patch below (i know that i could remove the if ;).

Greetings
  Nils

--- alps_tdlb7.c2003-07-08 02:19:51.0 +0200
+++ alps_tdlb7.c.new2003-07-08 02:18:47.0 +0200
@@ -148,9 +148,9 @@
int pwr;

if (freq <= 78200)
-   pwr = 1;
+   pwr = 3;
else
-   pwr = 2;
+   pwr = 3;

buf[0] = (div >> 8) & 0x7f;
buf[1] = div & 0xff;



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[linux-dvb] Re: Technotrend DVB-T 1.2 recommended for UK?

[Ragnar Sundblad]

--On den 8 juli 2003 00:30 +0200 Ragnar Sundblad <[EMAIL PROTECTED]> wrote:

--On den 7 juli 2003 22:52 + Juergen Peitz <[EMAIL PROTECTED]> wrote:

Monday, 7. Juli 2003 17:32 you wrote:

Do you still have the new fixes that Juergen made installed?
 I have, they may be what have fixed it for me.
Interesting! Is the card really running better with that patch?
Do you still have other problems with the frontend driver?
I have changed so many parameters now that I am actually not
sure anymore, but it was quite a while ago that I had a
frontend hang with the newer SP8870 firmware.
IIRC, it was the
+   /* read status reg in order to clear pending irqs */
+   sp8870_readreg(i2c, 0x200);
part that seemed to stop the frontend hangs, but I must test it
again to tell for sure.
I have now done a little testing, and it really does seem that
that pending irq clearing makes a difference!
Without it, I get a frontend hang of the kind that can be
resolved by changing channel (freqency) in one of maybe 20
channel switches.
With it, I don't think that kind of hang ever occurs for me.
/ragge



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[linux-dvb] Re: Technotrend DVB-T 1.2 recommended for UK?

[Ragnar Sundblad]

--On den 7 juli 2003 22:52 + Juergen Peitz <[EMAIL PROTECTED]> wrote:

Monday, 7. Juli 2003 17:32 you wrote:

Do you still have the new fixes that Juergen made installed?
 I have, they may be what have fixed it for me.
Interesting! Is the card really running better with that patch?
Do you still have other problems with the frontend driver?
I have changed so many parameters now that I am actually not
sure anymore, but it was quite a while ago that I had a
frontend hang with the newer SP8870 firmware.
IIRC, it was the
+   /* read status reg in order to clear pending irqs */
+   sp8870_readreg(i2c, 0x200);
part that seemed to stop the frontend hangs, but I must test it
again to tell for sure.
/ragge



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[linux-dvb] Re: Technotrend DVB-T 1.2 recommended for UK?

[Edward Wildgoose]

> >> What happens really often (but without any
> >> regularity in it) is that the frontend do not deliver any signal after
> >> changing the channel. I can often fix it, by changing back to the
previous
> >> channel again, wait until the OSD disappears, and then try another time
to
> >> switch to the desired channel. Which also means that the OSD still
works
> >> without any signal.
> >
> > This sounds like exactly the problem that I have.  I can sometimes get
it
> > back doing the trick you mention, but not more often than 1 in 10 times.
> > Usually it just dies permanently and only comes back when I reload the
> > dvbtt-pci module
>
> I see this also.
> Edward: is it possible, that you try tuning to channels on the same
> frequency? I ask, because if I have this problem, it usually disappears
> when I tune to a channel that is on a *different* frequency and then tune
> back.

Nope, my testing is usually to switch between BBC 2 and ITV 1 in the UK.
Back and forwards is killing output in 1-5 channel changes (it sometimes
dies first change even)

Ed



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[linux-dvb] Re: Technotrend DVB-T 1.2 recommended for UK?

[Juri Haberland]

Edward Wildgoose wrote:
>> What happens really often (but without any
>> regularity in it) is that the frontend do not deliver any signal after
>> changing the channel. I can often fix it, by changing back to the previous
>> channel again, wait until the OSD disappears, and then try another time to
>> switch to the desired channel. Which also means that the OSD still works
>> without any signal.
> 
> This sounds like exactly the problem that I have.  I can sometimes get it
> back doing the trick you mention, but not more often than 1 in 10 times.
> Usually it just dies permanently and only comes back when I reload the
> dvbtt-pci module

I see this also.
Edward: is it possible, that you try tuning to channels on the same
frequency? I ask, because if I have this problem, it usually disappears
when I tune to a channel that is on a *different* frequency and then tune
back.

>> I did not tested the composite out ever, because i just watch at the
> computer.
>> But i use a patched driver for my card, which fixes the problem for me
> that
>> the frontend takes several seconds to lock. I do not know or tested if
> this
>> fix also changes anything on the "black screen" problem.
> 
> I'm interested in a reference to your patch for frontend taking a while to
> lock?  My card takes about the same time to lock (second or so) as my set
> top box, but it seems pretty slow to me, especially as the card is often
> already on the right multi-plex...
> 
> Could you send me a link perhaps?

Yes, Nils (hi anyway :-)), please send the patch and discribe it a bit more.

Cheers,
Juri



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[linux-dvb] Re: Technotrend DVB-T 1.2 recommended for UK?

[Edward Wildgoose]

> What happens really often (but without any
> regularity in it) is that the frontend do not deliver any signal after
> changing the channel. I can often fix it, by changing back to the previous
> channel again, wait until the OSD disappears, and then try another time to
> switch to the desired channel. Which also means that the OSD still works
> without any signal.

This sounds like exactly the problem that I have.  I can sometimes get it
back doing the trick you mention, but not more often than 1 in 10 times.
Usually it just dies permanently and only comes back when I reload the
dvbtt-pci module

> I did not tested the composite out ever, because i just watch at the
computer.
> But i use a patched driver for my card, which fixes the problem for me
that
> the frontend takes several seconds to lock. I do not know or tested if
this
> fix also changes anything on the "black screen" problem.
>

I'm interested in a reference to your patch for frontend taking a while to
lock?  My card takes about the same time to lock (second or so) as my set
top box, but it seems pretty slow to me, especially as the card is often
already on the right multi-plex...

Could you send me a link perhaps?



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[linux-dvb] Re: Technotrend DVB-T 1.2 recommended for UK?

[Nils Ohlmeier]

On Monday 07 July 2003 22:12, Juergen Peitz wrote:
> Monday, 7. Juli 2003 11:56 Gregor Lawatscheck wrote:
> > There appear to be issues with the full featured version of the DVB-T 1.2
> > card but I don't think it has been established whether it's a problem
> > with some of the cards or even a single card. Neither is there much info
> > on whether it's a driver / firmware problem - which I guess is hard to
> > test as the generally quite stable 0.9.4 drivers (they don't appear to
> > mind reception errors or no signal too much) didn't support the full
> > featured DVB-T card?
>
> I have a working patch for the full featured card and the old oldstruct
> drivers. Because of the size I don't want to publish it on the mailinglist,
> but I could send it to you and everybody who is interested by private mail.
> Just let me know.

I'm definately interested in testing any patch for the DVB-T 1.2.
I currently do not have the time to participate in the discussion :-( But in 
the next week i have spare time for testing.

But i want to share briefly my experiences:
Complete lockups of the ALPS frontend are very rare for me. If they happen an 
unload and reload of the dvbtt-pci module fixes the problem (but the frontend 
module can stay in memory). What happens really often (but without any 
regularity in it) is that the frontend do not deliver any signal after 
changing the channel. I can often fix it, by changing back to the previous 
channel again, wait until the OSD disappears, and then try another time to 
switch to the desired channel. Which also means that the OSD still works 
without any signal.
I did not tested the composite out ever, because i just watch at the computer.
But i use a patched driver for my card, which fixes the problem for me that 
the frontend takes several seconds to lock. I do not know or tested if this 
fix also changes anything on the "black screen" problem.

Greetings
  Nils



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[linux-dvb] Re: Technotrend DVB-T 1.2 recommended for UK?

[Juergen Peitz]

Monday, 7. Juli 2003 17:32 you wrote:

> Do you still have the new fixes that Juergen made installed?
> 
> I have, they may be what have fixed it for me.

Interesting! Is the card really running better with that patch? 
Do you still have other problems with the frontend driver?

Juergen


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[linux-dvb] Re: Technotrend DVB-T 1.2 recommended for UK?

[Juri Haberland]

Ragnar Sundblad wrote:

> Do you still have the new fixes that Juergen made installed?
> 
> I have, they may be what have fixed it for me.

Ah, ok, I'll patch my kernel in a minute, but can't really test it,
because I'm going on a trip tomorrow. I'll report back on next monday.
Then I will see whether I still have a picture when I get back on Sunday.

> I guess Juergen never really got a report on this from the rest
> of us.

I must have missed it. Sorry. Thanks for pointing this out.

Cheers,
Juri



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[linux-dvb] Re: Technotrend DVB-T 1.2 recommended for UK?

[Juergen Peitz]

Monday, 7. Juli 2003 11:56 Gregor Lawatscheck wrote:

> There appear to be issues with the full featured version of the DVB-T 1.2
> card but I don't think it has been established whether it's a problem with
> some of the cards or even a single card. Neither is there much info on
> whether it's a driver / firmware problem - which I guess is hard to test as
> the generally quite stable 0.9.4 drivers (they don't appear to mind
> reception errors or no signal too much) didn't support the full featured
> DVB-T card?

I have a working patch for the full featured card and the old oldstruct 
drivers. Because of the size I don't want to publish it on the mailinglist, 
but I could send it to you and everybody who is interested by private mail. 
Just let me know.

Greetings 
Juergen


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[linux-dvb] Re: Technotrend DVB-T 1.2 recommended for UK?

[Ragnar Sundblad]

--On den 7 juli 2003 17:34 +0100 Edward Wildgoose <[EMAIL PROTECTED]> wrote:


4-5 channel changes looks terribly like the problem I've had with two
cards
which was resolved with 230k video memory (instead of 210k).

Does replaying of recorded channels work fine?
I haven't tried yet to be honest.  However, OSD *IS* still working for me
when this problem occurs.  Juri I think you said that your OSD is still
working also?
I think this suggests that it *isn't* an arm crash?  Is that correct?
Probably, since the ARM handles the OSD, and on my card that problems
only happens with the older SP8870 firmware.
Do you still have the new fixes that Juergen made installed?

I have, they may be what have fixed it for me.
I guess Juergen never really got a report on this from the rest
of us.
/ragge



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[linux-dvb] Re: Technotrend DVB-T 1.2 recommended for UK?

[Edward Wildgoose]

> 4-5 channel changes looks terribly like the problem I've had with two
cards
> which was resolved with 230k video memory (instead of 210k).
>
> Does replaying of recorded channels work fine?

I haven't tried yet to be honest.  However, OSD *IS* still working for me
when this problem occurs.  Juri I think you said that your OSD is still
working also?

I think this suggests that it *isn't* an arm crash?  Is that correct?



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[linux-dvb] Re: Technotrend DVB-T 1.2 recommended for UK?

[Juri Haberland]

Ragnar Sundblad wrote:
> 
> --On den 7 juli 2003 15:06 +0200 Juri Haberland <[EMAIL PROTECTED]> wrote:
> 
>> But: it has obviously some design flaw that leads to vertical lines on
>> the composite out (at least seen by me and another person).
> 
> Do you really have vertical lines on the composite out?
> I have horizontal lines traveling down over the screen, about 4
> of them can be seen at any time. On the tv last in my antenna

You are right. I meant horizontal lines. And yes, they are scrolling down
quite fast (actually, I would discribe them as waves or somesuch;
depending on the picture broadcasted, they are better visible or not at all).

> chain, on the other hand, I have some 30 vertical/diagonal lines,
> _if_ I let the signal go trough the DVB-T card. I don't know if
> these two problems are related.

Haven't tried this. I have a seperate antenna for the DVB card.

[SNIP]

> Is there really a DVB-T with a Grundig tuner? The ALPS tuner on
> my 1.2 can only tune to UHF too.

Looks like: http://www.usa-x.org/1shop/popup_image.php?pID=7

Cheers,
Juri



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[linux-dvb] Re: Technotrend DVB-T 1.2 recommended for UK?

[Ragnar Sundblad]

--On den 7 juli 2003 15:06 +0200 Juri Haberland <[EMAIL PROTECTED]> wrote:

But: it has obviously some design flaw that leads to vertical lines on
the composite out (at least seen by me and another person).
Do you really have vertical lines on the composite out?
I have horizontal lines traveling down over the screen, about 4
of them can be seen at any time. On the tv last in my antenna
chain, on the other hand, I have some 30 vertical/diagonal lines,
_if_ I let the signal go trough the DVB-T card. I don't know if
these two problems are related.
Also the
tuner (or frontend or whatever?) locks up often, so that you cannot tune.
It is not quite clear whether this can be resolved by the driver
developers or if this bug is in a closed source binary that has to be
taken from the Windows drivers.
It might be that the SP8870 problems are SP8870 hardware/firmware
bugs, but the lines on composite out I think are just because of
some hardware bug on the DVB-T 1.2 card, since they don't seem
to be there on the DVB-C or DVB-S.
There must be a way to fix this, and maybe the SP8870 would
then have an easier life too.
It is probably some grounding of the wrong pin, a missing
decoupling or something like that.
(Also see earlier postings from me on spikes on the IF line
from the tuner to the SP8870, and what I think seems to be
a bad tuner voltage source, both problems on both my first
and my replacement card.)
Actually I cannot recommend to buy this card.
Me neither, not until someone has found and fixed the hardware
problems at least.
--On den 7 juli 2003 15:59 +0200 Holger Waechtler <[EMAIL PROTECTED]> 
wrote:

Juri Haberland wrote:
Actually I cannot recommend to buy this card. If you can get the other
version with a Grundig tuner it might be better - but I don't know.
The Grundig Tuner can tune UHF channels only, better use a cheap Nova-T
or Nebula card and a DXR3 card from ebay as MPEG decoder.
Is there really a DVB-T with a Grundig tuner? The ALPS tuner on
my 1.2 can only tune to UHF too.
--On den 7 juli 2003 16:06 +0200 Juri Haberland <[EMAIL PROTECTED]> wrote:

BTW: there seems to be a new full featured DVB-T card from Technotrend:
TT-DVB-T1200
(german site:)

I wonder if it really is a new one, it could be that TT just
have started to multiply the version numbers with 1000 and it
really is just 1.2, since T1300 is the new budget 1.3.
(And there are good chances that it is a DVB-S card on that
picture since it has a F connector.)
/ragge



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[linux-dvb] Re: Technotrend DVB-T 1.2 recommended for UK?

[Gregor Lawatscheck]

At 16:06 07/07/2003, you wrote:
> 4-5 channel changes looks terribly like the problem I've had with two 
cards
> which was resolved with 230k video memory (instead of 210k).
>
> Does replaying of recorded channels work fine?

Yes, replaying works, even if the fronted locked up.

Cheers,
Juri
I highly suspect there is still a a problem with video memory size for 
decoding. It used to be 240k in 0.9.4 and went down afterwards to support 
new features. Klaus managed to up it back to 230k and this works fine for 
replying (-> transfer mode). Maybe it's not quite enough for the full 
featured cards. A 240k version would be interesting. You'd have to use a 12 
line OSD in vdr - but that's good enough for testing.

Moreover it would be interesting if someone with knowledge of the firmware 
could explain what "overflow buffer memory" is used for and whether there 
have been changes to this since 0.9.4 -- this seems to related to live view.



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[linux-dvb] Re: Technotrend DVB-T 1.2 recommended for UK?

[Gregor Lawatscheck]

At 16:06 07/07/2003, you wrote:
> The Grundig Tuner can tune UHF channels only, better use a cheap Nova-T
> or Nebula card and a DXR3 card from ebay as MPEG decoder. Or misuse a
> fullfeatured DVB-S card for decoding, this might still be cheaper than a
> fullfeatured DVB-T card...
Yes, this is what I'm currently thinking about.
Good scenatro, but please bear in mind with current drivers/firmware you've 
got to make sure you have a good sat or cable signal on the "misused" card, 
otherwise the ARM will crash after a couple of hours. 



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[linux-dvb] Re: Technotrend DVB-T 1.2 recommended for UK?

[Juri Haberland]

Gregor Lawatscheck wrote:
> At 14:13 07/07/2003, you wrote:

>>My full featured 1.2 card "stops working" after changing channel 4-5
>>times

> Would be interesting to see if it worked with an even higher video memory 
> in the firmware (like 240k). Obviously OSD would be tiny - just to test if 
> that causes it. To thest this one of the fw-wizards would have to find the 
> time to release such an experimental firmware for testing.
> 
> 4-5 channel changes looks terribly like the problem I've had with two cards 
> which was resolved with 230k video memory (instead of 210k).
> 
> Does replaying of recorded channels work fine? 

Yes, replaying works, even if the fronted locked up.

Cheers,
Juri



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[linux-dvb] Re: Technotrend DVB-T 1.2 recommended for UK?

[Juri Haberland]

Holger Waechtler wrote:
> Juri Haberland wrote:
>> 
>> Actually I cannot recommend to buy this card. If you can get the other
>> version with a Grundig tuner it might be better - but I don't know.
> 
> The Grundig Tuner can tune UHF channels only, better use a cheap Nova-T 
> or Nebula card and a DXR3 card from ebay as MPEG decoder. Or misuse a 
> fullfeatured DVB-S card for decoding, this might still be cheaper than a 
> fullfeatured DVB-T card...

Yes, this is what I'm currently thinking about.

BTW: there seems to be a new full featured DVB-T card from Technotrend:
TT-DVB-T1200
(german site:)
http://www.dvb-portal.de/oscn/modules.php?name=oscn_catalog&file=product_info&products_id=360&osCsid=d184bd90479ab8d479c9d6c217a21f20

Cheers,
Juri



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[linux-dvb] Re: Technotrend DVB-T 1.2 recommended for UK?

[Holger Waechtler]

Juri Haberland wrote:
Actually I cannot recommend to buy this card. If you can get the other
version with a Grundig tuner it might be better - but I don't know.
The Grundig Tuner can tune UHF channels only, better use a cheap Nova-T 
or Nebula card and a DXR3 card from ebay as MPEG decoder. Or misuse a 
fullfeatured DVB-S card for decoding, this might still be cheaper than a 
fullfeatured DVB-T card...

Holger



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[linux-dvb] Re: Technotrend DVB-T 1.2 recommended for UK?

[Gregor Lawatscheck]

At 14:13 07/07/2003, you wrote:
> the generally quite stable 0.9.4 drivers (they don't appear to mind
> reception errors or no signal too much) didn't support the full featured
> DVB-T card? Edward Wildgoose will know more about this, I'm sure.
My full featured 1.2 card "stops working" after changing channel 4-5
times
Basic symptoms are no error messages in logs, etc.  dvbtune or tzap go
through the motions of changing channel properly, even getting LOCK, but no
signal comes out of the card to either the analogue tv port on the card, or
via the driver to /dev/dvb
I have a very strong signal here as well I think...
Would be interesting to see if it worked with an even higher video memory 
in the firmware (like 240k). Obviously OSD would be tiny - just to test if 
that causes it. To thest this one of the fw-wizards would have to find the 
time to release such an experimental firmware for testing.

4-5 channel changes looks terribly like the problem I've had with two cards 
which was resolved with 230k video memory (instead of 210k).

Does replaying of recorded channels work fine? 



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[linux-dvb] Re: Technotrend DVB-T 1.2 recommended for UK?

[Edward Wildgoose]

> There appear to be issues with the full featured version of the DVB-T 1.2
> card but I don't think it has been established whether it's a problem with
> some of the cards or even a single card. Neither is there much info on
> whether it's a driver / firmware problem - which I guess is hard to test
as
> the generally quite stable 0.9.4 drivers (they don't appear to mind
> reception errors or no signal too much) didn't support the full featured
> DVB-T card? Edward Wildgoose will know more about this, I'm sure.

My full featured 1.2 card "stops working" after changing channel 4-5
times

Basic symptoms are no error messages in logs, etc.  dvbtune or tzap go
through the motions of changing channel properly, even getting LOCK, but no
signal comes out of the card to either the analogue tv port on the card, or
via the driver to /dev/dvb

I have a very strong signal here as well I think...

Not sure where the problem lies though...

Good luck!



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[linux-dvb] Re: Technotrend DVB-T 1.2 recommended for UK?

[Juri Haberland]

Gregor Lawatscheck wrote:
> At 13:42 07/07/2003, you wrote:
>>Which sounds great, but I've trawled the archives for this list and the 
>>1.2 version uses the SP8870 chip. Now I do believe the dvb driver now 
>>supports this chip, and I remember a post which says this card works great 
>>in Berlin. But there was a big thread a few months back about problems 
>>with the card hanging when maybe changing multiplexors for UK freeview. 
>>Were these problems ever solved? Is there anyone out there with a 1.2 
>>DVB-T in the UK who can recommend the card, or should I stick with my 
>>current setup, or perhaps something else?

> There appear to be issues with the full featured version of the DVB-T 1.2 
> card but I don't think it has been established whether it's a problem with 
> some of the cards or even a single card. Neither is there much info on 
> whether it's a driver / firmware problem - which I guess is hard to test as 
> the generally quite stable 0.9.4 drivers (they don't appear to mind 
> reception errors or no signal too much) didn't support the full featured 
> DVB-T card? Edward Wildgoose will know more about this, I'm sure. 

There seem to be two different full featured DVB-T cards from
Technotrend. The 1.2 version that I have uses the forementioned SP8870
chip (and an ALPS tuner) and is supported by the new DVB driver.
But: it has obviously some design flaw that leads to vertical lines on
the composite out (at least seen by me and another person). Also the
tuner (or frontend or whatever?) locks up often, so that you cannot tune.
It is not quite clear whether this can be resolved by the driver
developers or if this bug is in a closed source binary that has to be
taken from the Windows drivers.

Actually I cannot recommend to buy this card. If you can get the other
version with a Grundig tuner it might be better - but I don't know.

Cheers,
Juri



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[linux-dvb] Re: Technotrend DVB-T 1.2 recommended for UK?

[Gregor Lawatscheck]

At 13:42 07/07/2003, you wrote:
Which sounds great, but I've trawled the archives for this list and the 
1.2 version uses the SP8870 chip. Now I do believe the dvb driver now 
supports this chip, and I remember a post which says this card works great 
in Berlin. But there was a big thread a few months back about problems 
with the card hanging when maybe changing multiplexors for UK freeview. 
Were these problems ever solved? Is there anyone out there with a 1.2 
DVB-T in the UK who can recommend the card, or should I stick with my 
current setup, or perhaps something else?
I've used a 1.2 DVB-T Nova budget (!) card fine with current drivers / 
firmware and a full featured sat card for decoding (strong signal on sat 
card required so it doesn't ARM crash - but I'm hoping this will be fixed 
in the firmware / driver one of these days).

There appear to be issues with the full featured version of the DVB-T 1.2 
card but I don't think it has been established whether it's a problem with 
some of the cards or even a single card. Neither is there much info on 
whether it's a driver / firmware problem - which I guess is hard to test as 
the generally quite stable 0.9.4 drivers (they don't appear to mind 
reception errors or no signal too much) didn't support the full featured 
DVB-T card? Edward Wildgoose will know more about this, I'm sure. 



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