Hi all,

 

I was able to replicate the identical issue as trunktracker has reported.  It turns out to be a hardware virtualization issue in handling of the Airspy SDR’s running on Ubuntu as a VM on VMWare Player and not  an issue with the op25 code.

 

Normally, I use Oracle VirtualBox on a Windows-10 Pro 64 machine to run various Linux VM’s including Ubuntu 18.04 with op25.  That combination has worked perfectly using either the Airspy R2 or the RTL SDR’s.   However, I installed VMWare Player 15 last evening to experiment with Ubuntu 18.04 VM  and boatbod op25 to quickly discover I got the same results (error message) as trunktracker when attempting to run my Airspy R2.  Conversely, op25 did run perfectly on the VMWare Player setup as long as I only used the RTL SDR device.

 

So it then appears to be some type of virtualization issue with the Airspy devices on VM’s running on the VMWare Player.    I don’t know that is necessarily the case on other VMWare products such as the Pro version, and etc.    But it’s definitely broken as far as the Airspy is concerned with VMWare Player.  Changing USB modes (support) in the VM settings had not impact on the problem either.

 

I ran into a similar problem recently on my Windows-10 Machine where none of my SDR’s, Airspy or RTL types would run on any of my Linux VM’s.  That turned out to be a issue with Windows Defender causing a corruption with the USB hardware virtualization in VirtualBox.   

 

Bill, WA8WG

 

 

From: op25-dev@yahoogroups.com <op25-dev@yahoogroups.com>
Sent: Wednesday, November 28, 2018 6:48 PM
To: op25-dev@yahoogroups..com
Subject: Re: [op25-dev] Re: Beginner's Guide To Setting Up OP25 From Scratch

 

 

> On 29 Nov 2018, at 10:13, 'Trunk Tracker' trunktracker@tampabay.rr.com [op25-dev] <op25-dev@yahoogroups.com> wrote:
>
> Then I looked in stderr.2 and found this:

FYI this is a few bugs and bug fixes ganging up to crash.

The first bug was (it is fixed since *2016* - https://github.com/gnuradio/gnuradio/commit/11973c64437683cc99c48eae9eb4db8234f1ac42#diff-6afde48a2246887a22e0cbe0a675e1c8) in GNUradio #528.

A work around was added to rtl-sdr (which is the "Trying to fill up.." message) which is at https://github.com/osmocom/gr-osmosdr/blob/5ecfa255d299b9b4842ccd09a02892a853fcd5a7/lib/source_impl.cc#L413

The second bug is p25_demodulator.py crashing because it doesn't detect self.decim is zero.

It looks like gr-osmosdr now has the work around removed (since July 2017) - https://github.com/osmocom/gr-osmosdr/commit/ea6b356cfda8a90fa6d727fcc13aae60547962a2

tl;dr:
- It didn't find your hardware, check your VM pass through
- Update gr-osmosdr to get less confusing errors :)

--
Daniel O'Connor
"The nice thing about standards is that there
are so many of them to choose from."
-- Andrew Tanenbaum