[ivtv-users] HVR-1600 sound problem

[Ben Nemec]

On Sunday 08 February 2009 03:17:47 pm Andy Walls wrote:
[snip]
>
> How does line in analog audio sound when you use Composite  or SVideo
> in?
I'm afraid I don't have any appropriate devices immediately available, but 
I'll see if I can find something.
>
> > It does seem that my cable company may have made changes that coincided
> > with this power outage because suddenly my cable quality seems to have
> > improved signficantly on my PVR150 that's still working.  Not sure
> > whether that could be related.  I was also running a 2.6.24 kernel
> > previously when this was working but now I'm on 2.6.27 because I did an
> > update to make sure I had the newest versions of everything after it quit
> > working.
>
> The newer kernel do something different with the PCI bus, that can cause
> a lot more PCI bus errors to happen at bootup (the bus is busier).  This
> in turn can cause some cx18 register settings related to audio to fail.
>
> You really do need to try the AUDIO_ENABLE register related fix I have
> at my cx18 repo.
I tried this, but I seem to be hitting the I2C_DRIVERID_TVMIXER error that I 
believe you are already aware of.  Since it appears your audio changes went 
in after the change that caused it I can't get them built.  Is there a 
workaround?
>
> You can also try unloading the cx18 module, or prevent it from loading
> at boot up with a blacklist option in modprobe.conf, and load it when
> the bus is rather quiet.  If it works in that case, you may want to take
> out your PCI cards, blow the dust out of the slots and re-install the
> cards (take antistatic discharge precautions of course).  This will
> often improve PCI bus signals that have degraded, as the PCI bus relies
> on both the incident and reflected voltage wave to reach the proper
> signalling level on the lines.
I tried this as well, but still no luck.

-Ben