[arm-allstar] 2 nodes on pi, audio goes out 1 node

[David McGough]

Hi Derek,

This issue has been sporadically discussed as of July, 2020. The problem
was reported in late June. Agreed that a message about this probably
belongs on the website, since a resolution still isn't here. I'll add this
in the next few days.

I commented about this issue on the Raspberry Pi forum back in June. I
believe a similar issue was reported in February. See this link, which
also demonstrates how to reproduce the issue directly with ALSA:

https://www.raspberrypi.org/forums/viewtopic.php?f=44&t=265458&p=1684129

I expect the problem is a USB driver bug, but I haven't gone digging. Most 
of the time previously, these type of issues have seen prompt resolution 
in updated kernels, without needing much discussion.


Note that the RPi4B works VERY well in all scenarios except multiple USB
fobs.  The HamVoIP recommendation is to only use a single USB fob per RPi
system. So, relatively few users have encountered this issue. At the low
cost of hardware, a single node per RPi will continue to be the standard
recommendation.


73, David KB4FXC



On Thu, 6 Aug 2020, Derek Chauran wrote:

> Is this bug documented anywhere? I spent a lot of time trying to 
troubleshoot this issue. If it's a known issue I think it should probably 
be listed as such in the HamVoip docs. If there;s a corresponding Kernel 
bug, I'd also like to go take a look at it.