Kev,

> Make sure that the GPIO pin used for audio isn't getting its mode
> changed by one of your programs using the GPIO.

Any idea how I can check that ?    'Cause currently I can only guess to if,
and if so, why that happens.

Also, I've re-run "speaker-test" directly after booting (with none of my
(manually started, python) programs having run yet), and its still hdmi
only.

The only thing I can currently think of is that I've enabled a few things,
like SPI and I2C, as well as bluetooth.

> If you installed a new OS to another SD card and that played
> audio over the analogue output, then that would at least confirm
> that it's a software problem rather than a hardware one.

Its confirmed.

I remembered that I had another sd card with the same, but never actually
used OS on it (checked using "uname -a"), and it has no problem, using
"speaker-test" outputting (stereo!) sound over the audio jack.

So, its a software and/or configuration problem.  Any idea to how to figure
out what causes it (other than to go thru time-consuming rounds of multiple
re-installs and configurations of everything)  ?   A diagnostic program
perhaps ?

Regards,
Rudy Wieser

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