[linux-dvb] [PATCH] Assistance writing patch for Nova-T 500 stuttering problems

Patrick Boettcher patrick.boettcher at desy.de
Tue Jul 31 12:08:51 CEST 2007


I'm stupid. I arrived at my desk this morning and the commit window was 
still open.

It is now committed.

Patrick.


On Tue, 31 Jul 2007, Matt Doran wrote:

> Hi Patrick,
> 
> Thanks for that Patrick. My patch fixed the problem for me and someone else I
> know with the same card.   I'll try the fix tonight, and also will get the
> other guy to test it.
> 
> What module parameter do I need to use?   Do I also need the new firmware?
> 
> I looked through your repository and couldn't see the change that fixed the
> problem, what was the revision? ... e.g. my patch added a module parameter to
> dib3000mc, but I can see a new module parameter there.
> 
> Thanks,
> Matt
> 
> Patrick Boettcher wrote:
> > Hi Matt,
> >
> > Based on your Idea I just committed something which will fix your problems
> > using a module parameter.
> >
> > I don't know why Hauppauge has splitted the fix into two, it is not useful,
> > both register-changes are required to solve the issue.
> >
> > By using those settings one will decrease the mobile performance of the
> > receiver, but for fixed-reception it is OK.
> >
> > Can you please try it from my hg repo: http://linuxtv.org/hg/~pb/v4l-dvb/?
> >
> > regards,
> > Patrick.
> >
> > On Thu, 19 Jul 2007, Matt Doran wrote:
> >
> >   
> > > Hi Patrick,
> > >
> > > I tracked down the code that sets up the registers in dib3000mc.c.  I
> > > created
> > > a patch to add a "fix_sfn" module option to the dib3000mc modele.  e.g.
> > > when
> > > fix_sfn 0x01 bit is set, configure register 29 -> 0x1073 ... when fix_sfn
> > > 0x02
> > > bit is set, configure register 108 -> 0x4000.  I've tested this with
> > > "fix_sfn" set to 3 to enable both fixes, and it doesn't
> > > cause any regressions.  Tonight I have not had any reception/stuttering
> > > problems (it doesn't happen all the time), so I'm not sure if it fixes the
> > > problem..... but I'll continue to use this to see if it successfully
> > > resolves
> > > my issues.  I'll also ask others I know who see this problem to test this
> > > fix.
> > >
> > > Can you review this patch?  Does it look right?
> > >
> > > I wasn't sure what to call the module option, or how to describe the
> > > options
> > > ... if you have any suggestions I'd be happy to adjust the patch.
> > >
> > > Regards,
> > > Matt
> > >
> > > Patrick Boettcher wrote:
> > >     
> > > > Hi,
> > > >
> > > > I nothing really important happens I'm trying to provide something this
> > > > or
> > > > beginning of next week.
> > > >
> > > > Patrick.
> > > >
> > > > On Sun, 15 Jul 2007, Matt Doran wrote:
> > > >   
> > > >       
> > > > > Hi there,
> > > > >
> > > > > The Nova-T 500 has some serious problems with some channels in various
> > > > > locations around Australia. These channels show serious video
> > > > > break-up/stuttering like there is poor reception, however this is not
> > > > > the
> > > > > case.   Using other tuners (e.g. other cards, or tuners in TVs), or
> > > > > using
> > > > > the Nova-T 500 on Windows doesn't exhibit these problems.  I raised
> > > > > this
> > > > > issue 3 or four months ago
> > > > > (http://www.linuxtv.org/pipermail/linux-dvb/2007-April/017065.html).
> > > > >
> > > > > Patrick Boettcher indicated that it relates to some peculiarities with
> > > > > the
> > > > > DVB broadcast
> > > > > (http://www.linuxtv.org/pipermail/linux-dvb/2007-April/017102.html).
> > > > > The Hauppauge windows drivers now have a registry key
> > > > > (HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\HCW99BDA\Parameters\FixSFN)
> > > > > that can be used to modify the tuner's behaviour to fix this problem.
> > > > >
> > > > > I'd like to work on a patch for the drivers to add a module option
> > > > > "fix_sfn", that does the same as the windows drivers.  But need to
> > > > > know
> > > > > what registry settings need to be changed.  If Patrick or someone from
> > > > > Hauupauge or Dibcom could give me this information, I'd like to
> > > > > develop
> > > > > the initial patch.
> > > > >
> > > > > Thanks in advance,
> > > > > Matt
> > > > >
> > > > > _______________________________________________
> > > > > linux-dvb mailing list
> > > > > linux-dvb at linuxtv.org
> > > > > http://www.linuxtv.org/cgi-bin/mailman/listinfo/linux-dvb
> > > > >
> > > > >     
> > > > >         
> > > >   
> > > >       
> >
> >
> >   
> 



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