Re: [linux-dvb] Re : Technotrend Budget S2-3200 Digital artefacts on HDchannels]

Re: [linux-dvb] Re : Technotrend Budget S2-3200 Digital artefacts on HDchannels]

[Jonas Kvinge]

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Manu Abraham wrote:
> Alex Betis wrote:
>> On Tue, Jan 27, 2009 at 9:56 PM, Manu Abraham <abraham.manu@gmail.com>wrote:
>>
>>>> Hmm OK, but is there by any chance a fix for those issues somewhere or
>>>> in the pipe at least? I am willing to test (as I already offered), I
>>>> can compile the drivers, spread printk or whatever else is needed to
>>>> get useful reports. Let me know if I can help sort this problem. BTW in
>>>> my case it is DVB-S2 30000 SR and FEC 5/6.
>>> It was quite not appreciable on my part to provide a fix or reply in
>>> time nor spend much time on it earlier, but that said i was quite
>>> stuck up with some other things.
>>>
>>> Can you please pull a copy of the multiproto tree
>>> http://jusst.de/hg/multiproto or the v4l-dvb tree from
>>> http://jusst.de/hg/v4l-dvb
>>>
>>> and apply the following patch and comment what your result is ?
>>> Before applying please do check whether you still have the issues.
>> Manu,
>> I've tried to increase those timers long ago when played around with my card
>> (Twinhan 1041) and scan utility.
>> I must say that I've concentrated mostly on DVB-S channels that wasn't
>> always locking.
>> I didn't notice much improvements. The thing that did help was increasing
>> the resolution of scan zigzags.
>
> With regards to the zig-zag, one bug is fixed in the v4l-dvb tree.
> Most likely you haven't tried that change.
>
>> I've sent a patch on that ML and people were happy with the results.
>
> I did look at your patch, but that was completely against the tuning
> algorithm.
>
> [..]
>
>> I believe DVB-S2 lock suffer from the same problem, but in that case the
>> zigzag is done in the chip and not in the driver.
>
> Along with the patch i sent, does the attached patch help you in
> anyway (This works out for DVB-S2 only)?
>
>
>

- From what I understand the driver still has some issues. Got feedback
from another guy with Canal Digital in Norway that he has the same
issues as me.

Not sure if the diff was an attempt to fix the digital artefacts but I
tried applying the diff manually on the source I grabbed from
http://jusst.de/hg/v4l-dvb/ but did not notice any improvements or
difference with the artefacts. Would any logs be helpful?

If there is anything else I could try I'm willing to try it out. I
appreciate your effort. Thanks.


Jonas
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Re: [linux-dvb] Re : Technotrend Budget S2-3200 Digital artefacts on HDchannels]

[Newsy Paper]

it's really disappointing that this error exists for long time and everybody ran out of idea how to fix it :(


regards

Newsy

--- Jonas Kvinge <linuxtv@night-light.net> schrieb am Di, 3.2.2009:

> Von: Jonas Kvinge <linuxtv@night-light.net>
> Betreff: Re: [linux-dvb] Re : Technotrend Budget S2-3200 Digital artefacts on HDchannels]
> An: linux-dvb@linuxtv.org
> Datum: Dienstag, 3. Februar 2009, 20:00
> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA1
> 
> 
> Manu Abraham wrote:
> > Alex Betis wrote:
> >> On Tue, Jan 27, 2009 at 9:56 PM, Manu Abraham
> <abraham.manu@gmail.com>wrote:
> >>
> >>>> Hmm OK, but is there by any chance a fix
> for those issues somewhere or
> >>>> in the pipe at least? I am willing to test
> (as I already offered), I
> >>>> can compile the drivers, spread printk or
> whatever else is needed to
> >>>> get useful reports. Let me know if I can
> help sort this problem. BTW in
> >>>> my case it is DVB-S2 30000 SR and FEC 5/6.
> >>> It was quite not appreciable on my part to
> provide a fix or reply in
> >>> time nor spend much time on it earlier, but
> that said i was quite
> >>> stuck up with some other things.
> >>>
> >>> Can you please pull a copy of the multiproto
> tree
> >>> http://jusst.de/hg/multiproto or the v4l-dvb
> tree from
> >>> http://jusst.de/hg/v4l-dvb
> >>>
> >>> and apply the following patch and comment what
> your result is ?
> >>> Before applying please do check whether you
> still have the issues.
> >> Manu,
> >> I've tried to increase those timers long ago
> when played around with my card
> >> (Twinhan 1041) and scan utility.
> >> I must say that I've concentrated mostly on
> DVB-S channels that wasn't
> >> always locking.
> >> I didn't notice much improvements. The thing
> that did help was increasing
> >> the resolution of scan zigzags.
> >
> > With regards to the zig-zag, one bug is fixed in the
> v4l-dvb tree.
> > Most likely you haven't tried that change.
> >
> >> I've sent a patch on that ML and people were
> happy with the results.
> >
> > I did look at your patch, but that was completely
> against the tuning
> > algorithm.
> >
> > [..]
> >
> >> I believe DVB-S2 lock suffer from the same
> problem, but in that case the
> >> zigzag is done in the chip and not in the driver.
> >
> > Along with the patch i sent, does the attached patch
> help you in
> > anyway (This works out for DVB-S2 only)?
> >
> >
> >
> 
> - From what I understand the driver still has some issues.
> Got feedback
> from another guy with Canal Digital in Norway that he has
> the same
> issues as me.
> 
> Not sure if the diff was an attempt to fix the digital
> artefacts but I
> tried applying the diff manually on the source I grabbed
> from
> http://jusst.de/hg/v4l-dvb/ but did not notice any
> improvements or
> difference with the artefacts. Would any logs be helpful?
> 
> If there is anything else I could try I'm willing to
> try it out. I
> appreciate your effort. Thanks.
> 
> 
> Jonas
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> Version: GnuPG v2.0.9 (GNU/Linux)
> Comment: Using GnuPG with SUSE - http://enigmail.mozdev.org
> 
> iEYEARECAAYFAkmIlGoACgkQpvOo+MDrK1H4yACdHPoej4cSsfPvp7m4NUGsAjAz
> 36EAn3cz9MffjPWztzyMEOcs0VcxhQdD
> =h9tA
> -----END PGP SIGNATURE-----
> 
> _______________________________________________
> linux-dvb users mailing list
> For V4L/DVB development, please use instead
> linux-media@vger.kernel.org
> linux-dvb@linuxtv.org
> http://www.linuxtv.org/cgi-bin/mailman/listinfo/linux-dvb