Re: [wsjt-devel] WSJT-X version 1.60 devel by K1JT and Yeasu FT-991 (buffer underflow)

[John N. <n1...@ya...>]

Peter Frenning[ OZ1PIF] <peter@...> writes:

> 
> 
>     Den 21-09-2015 kl. 22:01 skrev Peter
>       Frenning [OZ1PIF]:
> 
>     
>       Den 21-09-2015 kl. 19:39 skrev KI7MT:
> 
>       
>         Hello Haken,
> 
> I can't ( won't ) speak to Mint 17.x specifics, as it is *not* Ubuntu,
> however, I can state, all of my PPA's work properly on Ubuntu 14.04+ as
> that is my main distribution for building and testing WSJT-X on Linux.
> 
> It is well known that Mint has implemented unique sound system when
> compared to Ubuntu proper (Unity). These issues are not Ubuntu bugs
> (IMHO), clearly not WSJT-X bugs, and the issue(s) should be addressed
> with the Mint folks.
> 
> 
> 73's
> Greg, KI7MT
> 
> 
>       
>       I'm running 1.6.0 r5881 (32bit) from Greg's PPA on Mint 17.1 and 
17.2 - 
> no sound system modifications made, and no problems whatsoever. Running 
> WSPR-2 and JT65+JT9 modes. Many many JT9 & JT65 QSOs made, and hundreds 
> of hours running WSPR-2 with Tx enabled.
> 
> 
>     
>     Forgot to say that I'm using a modified SignalinkUSB
>       connected to a Tentec Orion 2 (mostly) or a Yaesu FT-847-- 
> Vy 73 de OZ1PIF/5Q2M, Peter
> 
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Greetings All,

I used to see this in a terminal running custom minimal Ubuntu install. It 
never caused me any operating issues, but I attempted to correct the 
reported underflow. I haven't been running WSJT-X all Summer, because I 
have been doing computer hardware upgrades, and my ham computers HDD's are 
wiped, but as I recall, using alsa-mixer to mute the 1 unnecessary audio 
channel corrected the problem, but... I experimented a lot with my OS 
setup, and in the end I got rid of Pulseaudio. WSJT-X works just fine on a 
ALSA only setup, that is, no pulseaudio. Again, this is all from recalling 
my OS installation setup. I am inclined to think that muting the unused 
audio channel will correct this issue, as Signalink only using 1 channel. I 
believe.

It is also possible that using the Ubuntu 15.04, and later might also 
correct this issue, I say that because I tend to use the latest and 
greatest Ubuntu release, currently 15.10, and that has all the latest QT 
updated software as well. I was using 15.10 this last Spring 2015 with 
WSJT-X, and I know for certain, I stopped seeing this "underflow" issue 
reported in the terminal, everything was working perfectly. The latest 
WSJT-X dev. releases of that time period.

I'll be up and running WSJT-X again real soon.

I hope this helps.

73, John, N1ISA