[linux-dvb] [PATCH] Assistance writing patch for Nova-T 500 stuttering problems
patrick.boettcher at desy.de
Mon Jul 30 20:32:49 CEST 2007
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/?
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.
> 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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