[mythtv-users] Signal Strength OSD

Devin Heitmueller dheitmueller at kernellabs.com
Tue Jan 5 16:32:27 UTC 2010


On Tue, Jan 5, 2010 at 11:26 AM, Adam Brown <abrown at spsu.edu> wrote:
> Hi all,
>
> Have a quick question. I've recently upgraded to mythtv 0.22, love it,
> but one problem. When first entering live tv from the "Watch TV" menu,
> the OSD shows the signal strength from my OTA HDTV Antenna. When
> selecting another channel (while in live tv mode) the signal strength
> meter always displays 0%, even though the channel comes in perfectly
> clear. In 0.21 all channels showed a signal. Is this a bug in the 0.22
> OSD?

It's not actually a bug - it's a lack of standardization of the units
in which different tuner drivers report Strength/SNR information
(hence applications do not know how to report the info since it
differs with every tuner).  The way MythTV shows the info is
appropriate for a particular model of tuner, presumably because
whoever wrote the code did what worked for whatever model of tuner
he/she happened to have.

You can search the linux-media mailing list archives for more on the
topic (as it's been discussed at length).

Devin

-- 
Devin J. Heitmueller - Kernel Labs
http://www.kernellabs.com


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