[ivtv-users] cx18 HVR-1600 Analog Audio Issues

[Darren Blaber]

Andy Walls wrote:
> On Sat, 2010-02-27 at 14:45 -0500, Darren Blaber wrote:
>   
>> Devin Heitmueller wrote:
>>     
>>> On Sat, Feb 27, 2010 at 3:41 AM, Darren <dmbtech at gmail.com> wrote:
>>>   
>>>       
>>>> Hello,
>>>>
>>>> I recently bought a HVR-1600 PCI card, and after playing with it for quite a
>>>> while, it seems I have come to the conclusion that audio does not work
>>>> unless I start in windows first, then reboot back into linux. I am using the
>>>>
>>>> latest cx18 driver from http://linuxtv.org/hg/v4l-dvb/ . Its almost like the
>>>> card needs windows to initialize before it will work in linux.  I believe to
>>>> be using the latest firmware, I grabbed it from
>>>>
>>>> http://linuxtv.org/downloads/firmware/v4l-cx23418-apu.fw [along with the
>>>> rest of firmware files]. Is there anything I can do to debug this problem?
>>>>
>>>> Is it possible that the card has a hardware issue?
>>>>     
>>>>         
>>> Hello Darren,
>>>
>>> That seems a little suspicious, since I added the raw analog audio
>>> support and never once had the card booted into Windows.
>>>
>>> Are you talking about raw audio (either the /dev/video24 device or via
>>> ALSA)?  Or are you capturing MPEG video which contains audio?  Also,
>>> which input are you using?  The tuner input?  The S-video/composite
>>> input?
>>>
>>> Devin
>>>
>>>   
>>>       
>> I am capturing MPEG video that contains the audio, I am using the tuner 
>> input, grabbing everything from /dev/video0.
>>     
>
>
> When running a capture, please check the output of 
>
> $ v4l2-ctl --log-status
>
> looking especially at the lines starting with
>
> 	cx18-0 843:
>
> as these will show you the state of the A/V decoder and digitizer.  If
> the audio microcontroller can't dtetct the audio standard, it will stay
> muted and the log will show you that.
>
>
> I would be interested in see the dmesg or /var/log/messages output
> showing if all three firmware images loaded properly.
>
> So maybe try this:
>
> 1. blacklist the cx18 module in /etc/modprobe.d/balcklist (or whereever)
> 2. Shutdown your machine for 30 seconds or so - I want the memory
> holding the firmware to be cleared.
> 3. Restart into linux.
> 4. After boot up has settled, as root:
>
> 	# modprobe cx18 debug=255
>
>
> And look in /var/log/messages for firmware loading properly.
>
> Regards,
> Andy
>
>
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>   
Here is a dump of the registers, attached.
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