[mythtv-users] HVR4000 woes

[Liam Friel]

Hmm. Thanks for the hint.

I was considering fetching the 0.23 source and building it for debug at the
weekend.

What I might try first is changing the backend tuner priorities so that it
will pick the HVR 4000 DVB-S tuner in preference to the TT-3200 one ... to
see if this makes zapping stable in the case where there is no active DVB-S
recording ...

On Thu, Aug 26, 2010 at 11:27 AM, Mike Perkins <mikep at randomtraveller.org.uk
> wrote:

> Liam Friel wrote:
>
>> Hi,
>>
>> tried all those various suggestions, but it still doesn't change anything
>> for me :-(
>>
>> Switching from DVB-T to DVB-S locks up the frontend.
>>
>> Investigation shows that the frontend appears to lockup because, actually,
>> it's the backend which crashes and restarts.
>>
>> Backend log shows
>>
>> *** glibc detected *** /usr/bin/mythbackend: munmap_chunk(): invalid
>> pointer: 0xb5cb3020 ***
>>
>> (or similar)
>>
>> followed by a restart. This on attempting to start the DVB-S channel.
>>
>> Ring any bells with anyone?
>>
>>  This sounds to me like some kind of bad interaction between the two
> drivers, probably caused by some kind of bug in one of them. A guess would
> be one overwriting memory in the other.
>
> To debug this you're probably going to have to set DEBUG flags in the
> drivers when loading and fine-tooth the logs; or alternatively, get someone
> who knows the drivers to take a look...
>
> --
>
> Mike Perkins
>
>
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