TV tuner, sound etc. -- what does this mean?

Michael Schwendt mschwendt at
Tue Jul 28 01:46:00 UTC 2009

On Mon, 27 Jul 2009 15:48:45 -0400, William wrote:

> Hi;
> I have been going through my messages log and saw this.
> ...
> kernel: tuner 2-0042: chip found @ 0x84 (cx23885[0])
> kernel: tda829x 2-0042: could not clearly identify tuner address,
> defaulting to 60
> kernel: tda18271 2-0060: creating new instance
> kernel: TDA18271HD/C1 detected @ 2-0060
> kernel: tda829x 2-0042: type set to tda8295+18271
> ...
> Is this normal, or does "could not clearly identify tuner address"
> indicate a problem?


The implementation in the source code is ambiguous. The warning means that
either no tuner was detected or that multiple were detected (at most four
from 0x60 to 0x63), but the driver didn't pass its check when trying to
choose either one automatically, and then it uses a default address, 0x60.
Nevertheless, in a later check the driver thinks the tuner at the chosen
address works or else it would report an error "tuner access failed".

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