[mythtv] Shouldn't MythTV disable the tuner between switching inputs?

[Cal]

Sam Logen wrote:
> --- Sam Logen <starz909 at yahoo.com> wrote:
> 
>> Hi,
>> I was talking to someone over on the MythTV users
>> list
>> about how the current ivtv drivers don't allow
>> switching inputs while the tuner is still active.
>>
>> I learned that this is to prevent corruption in the
>> mpeg stream.
>>
>> I've got a pvr-150, and I'm unable to switch inputs
>> from the tuner to a composite source during livetv.
>>
>> Shouldn't mythtv disable the tuner prior to it
>> asking
>> for a different input from the driver?  Or would
>> that
>> break compatibility with other cards?
>>
>> Sam
>>
>>
>>      
> 
> 
> Hi everyone, I'd like to bring this issue up again
> because, partly, I didn't get a reply the first time,
> and second, since some time has gone by, perhaps this
> feature has been modified since then.
> 
>   Anyhow, when I'm attaching a device to a/v
> connectors on a PVR-150, and I'd like to watch Livetv
> through that, instead of the tuner, I can't seem to
> change my inputs on the card because the tuner isn't
> being shut off first (I have programming on the tuner,
> so I want to keep that input source).  I'm just asking
> if it's not better to have Mythtv shut off the tuner
> before switching away from it to a different input.
> 
> You can read my original email above, it says
> basically the same thing.  I'm just wondering why that
> sequence of commands (shutting down the tuner before
> switching inputs) hasn't been implemented.  Would it
> break compatibility, or is there another reason?
> 
> Thanks,
> Sam

Given that the ivtv drivers went into the kernel sources with 2.6.22,
can I ask what kernel version you're using?  I've been trying a little
bisection exercise on kernel versions to try to identify where it stops
working (on my system at least), and so far the results are a little
puzzling.

Cheers.