[mythtv-users] HVR-950q analog/NTSC capture has no sound

Hika van den Hoven hikavdh at gmail.com
Sat Feb 11 00:52:31 UTC 2017


Hoi James,

Friday, February 10, 2017, 11:48:12 PM, you wrote:

> On Fri, 10 Feb 2017, James Miller wrote:

>> On Fri, 10 Feb 2017, R. G. Newbury wrote:
>>
>>> It's a little off the wall, but try plugging the two units into USB sockets 
>>> *which are on different hubs*. Say, one on a rear socket and one on the 
>>> front of the box. It is quite possible that the usb sub-system is getting 
>>> confused about the number of units actually available *on one hub*, since 
>>> they obviously have the same usb identifier.
>>
>> Thanks for the suggestion, Geoff. Sounds worth a try, though I'll have to do 
>> some strategizing to implement it. First, I'm not sure this box has more than 
>> one hub built in: this is a Liva X with only 3 USB ports. I suppose it might 
>> nonetheless be worthwhile checking whether plugging one or other of the 
>> HVR-950q's into a different USB port might have an effect.

> Sure enough, by playing a bit of musical usb ports, I was able to cause
> the system to reboot/power-cycle with both tuners fully initialized and
> even in conformance with my udev rules (well, ok, I had to revise the alsa
> udev rules a bit). I'm reluctant to describe what worked since I don't
> really understand why it did; it will be unlikely to work in the way 
> described on a different system and I'm also not certain it will continue
> to work here--though it has so far through 2 power cycles. What will 
> happen if/when I will compile a new kernel, for example? I guess we'll
> have to see, should that eventuality transpire.

> Anyway, I plugged the behaving HVR-950q into the port where the flirc 
> formerly was inserted (directly into the Liva). I left the miscreant 
> HVR-950q plugged into the external USB hub, though in a different port on
> that hub. On booting the computer, everything came up just as I'd been
> expecting, with no need for any unplugging/replugging of usb capture 
> cards to get both operational and recognized by myth.

> I thought enumerating and naming of usb devices might have become more
> coherent at this stage in the 21st century, but I guess it hasn't. Go 
> figure. Back to boning up on slot-conflict resolutions for me.
> _______________________________________________

Describe, tell. Only data can have a chance of making us wiser. ;-)
And in the present time data is cheap.


Tot mails,
  Hika                            mailto:hikavdh at gmail.com

"Zonder hoop kun je niet leven
Zonder leven is er geen hoop
Het eeuwige dilemma
Zeker als je hoop moet vernietigen om te kunnen overleven!"

De lerende Mens



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