Hmm. Thanks for the hint.<br><br>I was considering fetching the 0.23 source and building it for debug at the weekend.<br><br>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 ... <br>
<br><div class="gmail_quote">On Thu, Aug 26, 2010 at 11:27 AM, Mike Perkins <span dir="ltr"><<a href="mailto:mikep@randomtraveller.org.uk">mikep@randomtraveller.org.uk</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;">
<div class="im">Liam Friel wrote:<br>
<blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;">
Hi,<br>
<br>
tried all those various suggestions, but it still doesn't change anything<br>
for me :-(<br>
<br>
Switching from DVB-T to DVB-S locks up the frontend.<br>
<br>
Investigation shows that the frontend appears to lockup because, actually,<br>
it's the backend which crashes and restarts.<br>
<br>
Backend log shows<br>
<br>
*** glibc detected *** /usr/bin/mythbackend: munmap_chunk(): invalid<br>
pointer: 0xb5cb3020 ***<br>
<br>
(or similar)<br>
<br>
followed by a restart. This on attempting to start the DVB-S channel.<br>
<br>
Ring any bells with anyone?<br>
<br>
</blockquote></div>
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.<br>
<br>
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...<br>
<br>
-- <br><font color="#888888">
<br>
Mike Perkins</font><div><div></div><div class="h5"><br>
<br>
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