[mythtv] EPG/LiveTV/ivtv problem with backtraces

[Edward Wildgoose]

> I can lockup the frontend while in the EPG by quickly scrolling through the
> channel lineup, I have 291 channels.  The same symptoms occur sporadically
> when watching LiveTV too.  

I'm guessing that you hold down the arrow key to scroll and the epg scrolling is somewhat sluggish yeah?

The epg does a ton of little queries, each one is quite computationally expensive, hence the sluggish movement (at least that's how I understand the code.  Could be wrong).  It might be as simple as the machine loading up due to scrolling the epg which is causing a stall reading from your PVR card, and the driver not being happy filling up buffers.

It's not an ideal solution, but some workarounds you could look at would be:

a) If you have mysql4 then turning on the query cache gives a BIG speedup to the EPG.
b) Try a low latency kernel patch.  The extra interactivity might mean more frequent servicing of the PVR interrupts...?