[linux-dvb] Asus My Cinema P7131 Dual

hermann pitton hermann-pitton at arcor.de
Tue Jun 13 23:04:52 CEST 2006


Hello,

Am Dienstag, den 13.06.2006, 14:35 +0200 schrieb Benjamí Villoslada:
> I'm looking for one card with FM + DVB that works in Debian Sid (custom kernel 
> from vanilla 2.6.16.18-smp)
> 
> Seems that Asus My Cinema P7131 Dual should work fine because is in the 
> CARDLIST.saa7134 as the #78 card:
> 
> ------------------
> $ grep -i 
> 7131 /usr/src/linux-2.6.16.18/Documentation/video4linux/CARDLIST.saa7134
> 
>  78 -> ASUSTeK P7131 Dual                       [1043:4862]
> ------------------

yes, that one works fine for me. It has also an on board analog audio
out connector and so you don't depend on saa7134-oss or saa7134-alsa for
sound, but this works too either using sox or mplayer/mencoder to access
the saa7134 dsp and mixer. (the two pins in the middle are ground and
this cable was not bundled with mine)

There is another Asus My Cinema P7131 Dual with subsystem 1043:4857,
which is not confirmed for DVB-T and radio yet, AFAIK.

> But I'm afraid because since now I've tested 3 cards and always I get the same 
> sound error with ALSA:   kernel: saa7133[0] dsp access error

There have been some reports of incompatibilities with some kernels and
installed distro alsa, but can't say for Debian.

> The difference is that those 3 cards have no specific entry in the 
> CARDLIST.saa7134 file.

This usually indicates that the cards are
unknown/uninvestigated/unsupported. The latest cardlist is always within
the mercurial repository.

> Anyone have one Asus My Cinema P7131 Dua working in Debian?   With FM sound.

Not on Debian, but card=78 1043:4862 works since about eight or nine
months for me now. With nice FM stereo sound since about four months
after Hartmut adjusted the saa7133/35/31e to the special 5.5MHz FM IF
the Philips silicon tuners use. Is in 2.6.16.

There is no signal strength and stereo detection on radio implemented
with the saa7131e yet, means radio autotuning doesn't work. You have to
set up a list of your stations manually once. The IR remote is also not
yet supported and to have a fine picture on analog TV it needs cable-tv
input, poor FreeToAir broadcast is not recommended. Some complain about
a little bit slow analog channel switching too. Else, for what I know
and can compare to, it performs very well.

BTW, using all three input types at once without to plug antenna
connectors is only possible if you have the radio on the same antenna
input as DVB-T. It comes up currently with DVB-T and analog on the
cable-tv input. After using radio once the FM connector is also active
for DVB-T input then. Using one of the analog video inputs switches
back.

To quote Hartmut for some other known caveats on this and similar cards
from the video4linux-list

Am Dienstag, den 30.05.2006, 00:31 +0200 schrieb Hartmut Hackmann:
> The messages look ok. You live in France?
> In this case, you need to add the option "secam=l" to the tuner
> module.
> This should make analog TV work.
> For DVB-T, you need to have a proper initial config file for your
> area.
> There are 2 pitfalls:
> - Some drivers ignore modulation parameters like FEC and guard
> interval.
>    But for the TDA10046, you need to set them correctly or to auto,
> otherwise
>    it will not lock.
> - In some countries - including France - some transmitters are + or
> -166kHz
>    off the channel center frequency. In the current driver
> implementation,
>    the TDA10046 will not lock with such an offset. So you need to
> correct
>    the channel frequency in such a case.

Cheers,
Hermann











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