Re: Fwd: KnoppMyth/LinHES Linux - Analog audio out to ear phones works but not to TV. Ubuntu 9-i386 LiveCD everything works fine!

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Matt Snow wrote:
> On Fri, Jul 10, 2009 at 2:20 AM, Clemens Ladisch<cladisch@xxxxxxxxxxxxxx> wrote:
>> Matt Snow wrote:
>>> On Thu, Jul 9, 2009 at 12:05 AM, Clemens Ladisch<cladisch@xxxxxxxxxxxxxx> wrote:
>>>> Matt Snow wrote:
>>>>> After upgrading to KnoppMyth/LinHES R6(ArchLinux), the analog out
>>>>> plays audio perfectly through head phones or powered speakers, but the
>>>>> 3.5mm stereo-to-RCA cable going to RCA input on the TV doesn't produce
>>>>> any sound at all.
>>>> Isn't that the same jack on the card?  Or where have you connected the
>>>> headphones, the speakers and the TV?
>>> there are several analog jacks on the card for different channels. i'm
>>> using the front speaker jack, but have tried all jacks with the TV and
>>> ear phones.
>> So the headphones or speakers in the front jack work, and the to-RCA
>> cable in the *same* jack does not?  This is obviously a broken cable
>> (or TV).

I didn't read the whole thread, but - just an idea:
Couldn't it also be some jack-detection of the soundcard?
In case it uses the impedance of the connected device for the plug-in
dectection, it might not notice the TV if its inputs have a higher
impedance than your phones or powered speakers.

> You might think that, but its fine. I take the exact same hdmi+dvi
> adaptor, and the rca-to-stero cable, plug in to either my macbook pro,
> or macbook with mini displayport adaptor to hdmi and I get audio and
> video.
> 
> Put the plugs right back to the HTPC, get nothing. leave them there,
> boot a i386 Ubuntu 9.x Jaunty liveCD and Audio out of the TV works.
> 
Perhaps the plug-in detection code has changed (if there is/was any used
for this card).

> TV and cables are fine, and the hardware is all fine as well. It's
> obviously a kernel/driver issue. i'm still working on compiling a new
> kernel but haven't had the time to do further troubleshooting.
> 
>>
>> Best regards,
>> Clemens
>>
> 
> ..Matt
--fe


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