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

[Michael Krufky]

On Sun, Nov 1, 2009 at 9:00 PM, Mike Isely <isely at isely.net> wrote:
>
> Roger:
>
> One has *nothing* to do with the other.
>
> On Sun, 1 Nov 2009, Roger 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, e.g. application just has a for-loop which
> successively tunes each known station, monitors it a bit to find the EPG
> data, then goes onto the next station.  That's all driven by the
> application.  Heck, the hardware doesn't even know what those
> frequencies are, since that's a function of the frequency table which
> only the application knows.
>
>
>>
>> (There was a recent LCD TV performing this, which in turn, spurred the
>> EPA to update it's docs/requisites for power saving.  The fix to this is
>> to only scan for EPG data for a maximum count per day, instead of every
>> second.)
>
> Completely irrelevant for the pvrusb2 driver or anything it drives.

Roger,

If you're using mythtv, enable the option "OPEN DVB CARD ON DEMAND"
and disable the option to "USE ONAIR GUIDE"

done.

enjoy :-)

-Mike Krufky