[linux-dvb] [PATCH] Nova-T 500 issues - losing one tuner

Jonas Anden jonas at anden.nu
Mon Feb 4 19:51:22 CET 2008


Hmm... typical, isn't it? Just about ten minutes after I've sent out the
patch, the second tuner died again. It appears this is *not* enough to
fix the issue. Please discard the previous mail.

  // J

On Mon, 2008-02-04 at 19:28 +0100, Jonas Anden wrote:
> Hi all, 
> 
> > I have a hunch about this problem...
> ...
> > This, ... leads me to believe that this is timer-induced. Something
> > can't keep up. Adding debugging makes the operations slightly slower
> > (the module needs to do additional IO to speak to syslogd), and this
> > delay seems to be enough to keep it operational.
> 
> Attached is an extremely simple patch which seems to resolve the issue
> for me. Before turning streaming on/off, I have inserted a tiny delay or
> 10 ms-
> 
> Just using 'debug=1' wasn't enough to keep tuner 2 from dying. I set it
> up yesterday morning with debug=1, and when I got back home in the
> evening the second tuner was dead again. I then made the attached patch
> and the system has been stable since then (~24 hrs).
> 
> I also made a slight change by removing a "| 0x00" from the code. It
> performs absolutely nothing (and is probably removed by the compiler in
> optimization) but confuse when reading the code, imho... Patrick, if you
> really want it there I can recreate the patch with the or statement
> back ;)
> 
> Feel free to try it out.
> 
>   // J
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