[mythtv-users] HVR4000 woes

[Mike Perkins]

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