I have attached two small patches to the scan application, the first (scan-check-fe.diff) adds a check to report an error if there was a problem setting the frontend parameters.
The second patch (scan-fallback.diff) queries the frontend capabilities before trying to use "INVERSION_AUTO". I agree that this might not be the best place to do this, but it works for me.
thanks, applied. Basically you have to retry with INVERSION_ON if tuning failed...
It looks like a good place to add the software auto-inversion might be in the generic dvb-frontend code, thereby allowing it to be used by any tuner which doesn't have the hardware suport feature. I'll take a look when I get some more time.
I'm not sure about this. For the inversion setting this approach works well, but would basically we need something similiar for all _AUTO parameters if we want to provide a consistent API...
And probing all parameters can get pretty expensive.
Holger
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