[pvrusb2] EPA Power Saving - HVR-1950 When Scanning EPG Data

[Michael Krufky]

On Mon, Nov 2, 2009 at 7:03 PM, Roger <rogerx at sdf.lonestar.org> wrote:
> On Mon, 2009-11-02 at 00:09 -0500, Michael Krufky wrote:
>> On Sun, Nov 1, 2009 at 9:00 PM, Mike Isely <isely at isely.net> wrote:
>
>> >> Just curious as to whether we could expect (patched firmware?) which
>> >> would fix the HVR-1950's 24/7 scanning for EPG data?
>> >
>> > The firmware doesn't do that scan, the application has to do it, like
>> > MythTV.  The firmware only does what it is told by the driver (e.g.
>> > pvrusb2), which only does what it is told by the application (e.g.
>> > MythTV)...
>> >
>> >
>> >>
>> >> >From what I understand, when tuners do scan for EPG data, they consume
>> >> much more power then when actually in standby.
>> >
>> > Actually, in this case I doubt it makes any difference.  The concept of
>> > "scanning for EPG data" does not exist in the device.  It's a function
>> > of the application
>
> Granted, I've heard of devices consuming more power during scanning.
> This was usually noticed by hotter devices "to the touch" when scanning
> EPG vs. not scanning EPG, but I have not put a power meter to the
> HVR-1950 -- nor any other devices for that fact.
>
>
>> Roger,
>>
>> If you're using mythtv, enable the option "OPEN DVB CARD ON DEMAND"
>> and disable the option to "USE ONAIR GUIDE"
>
> Hey Mike.  But if I do this, then EPG data isn't downloaded.  (Or, this
> is what I've seen in the past.)
>
> When I get more time, I'll muddle around the mythtv stuff to see if
> scans can be restricted to less then one hour a day, or so.  But I'm
> sure this has already been discussed or thought of during coding.
>
> And, due to all the previous notes on the mailing list concerning the
> scans causing other problems, likely already been discussed.

I dont bother with EPG scans -- I am *much* happier with the guide
data provided by schedules direct.  For $20 / year, you cant go wrong!

-Mike