[nos-bbs] Ubuntu 7.10 some more info about the issues I have

[Chris]

The rig is a VHF rig, Yaesu FT-7800R and it works fine as long as
packet isn't being done in linux.  Maybe I didn't say, but this is
strictly FM 2m 1200 baud packet.

I'm wondering if it isn't something to do with the sound sub system in
this distribution of linux having some sort of latency issue.  It's
about the only thing that would make sense with all the variety of
ways I've tried making it work.

I'll have to put a different distribution on another machine and try that.

On Sat, Mar 29, 2008 at 8:52 PM, Steven Stimpson (N1OHX)
<steven2 at gwi.net> wrote:
>
>  ----- Original Message -----
>  From: "Chris" <kc2rgw at gmail.com>
>  To: "TAPR xNOS Mailing List" <nos-bbs at lists.tapr.org>
>  Sent: Friday, March 28, 2008 10:58 AM
>  Subject: [nos-bbs] Ubuntu 7.10 some more info about the issues I have
>  .
>
>  You have run several different ax.25 engines and several interfaces, since
>  everything from the Mic input out ward has been tried twice, the only
>  possible solution is a problem with the rig. Regardless, I cannot
>  think of any problem with an ax.25 stack that would cause a packet
>  to be cut short, it is clearly a radio issue. start with ALC
>  troubleshooting..
>
>  Steven - N1OHX
>
>
>
>
>
>
>  > This isn't NOS specific, but I think the discussions have been on this
>  > list about this.
>  >
>  > The issue is basically that the packet data seems to shift around as
>  > far as TX Delay and TX Tail.  It isn't consistent in the 'window' so
>  > to speak.
>  >
>  > OS here is Ubuntu 7.10 x86
>  >
>  > I've run the Ubuntu packaged ax25 stuff, compiled my own, Ubuntu JNOS2
>  > and one I compiled on my own as well.
>  >
>  > This issue occurs with xNOS or with linux ax25.
>  >
>  > This has occurred running either a TNC in KISS mode or a soundmodem
>  > (userspace)
>  >
>  > I've run TX delay out to 500 at times and as short as 60 and TX tail
>  > out to 100 and as short as 0
>  >
>  > What happens is, sometimes I can hear the keying tone for a long
>  > while, then the packet goes and then hear the long tail.  This is what
>  > I would expect with the long settings.
>  >
>  > Other times, I get a TX delay that feels more like 50ms, the packet
>  > just squeaks through and cuts right off, works very fast.  This is how
>  > my same interfaces behave in Windows with AGWPE or via the TNC
>  > directly (command mode) in windows.
>  >
>  > Other times, nothing at all is TXed, just an empty carrier keyup
>  >
>  > Other times, the packet starts too late and ends too late.
>  >
>  > It shifts around...obviously causing a  mess of retries or very slow
>  > traffic.
>  >
>  > This all shifts around in the same session of operation.
>  >
>  > It may be an Ubuntu 7.10 issue with ax25 handling, it may be a kernel
>  > setting I haven't stumbled upon yet it could be that I'm the ultimate
>  > packet LID...but it's been driving me crazy.
>  >
>  > I have a TNC I run in KISS mode and two different soundcard
>  > interfaces, one traditional with a serial interface for keying and one
>  > (Tigertronics) that does its own keying.  The two soundcard interfaces
>  > behave themselves perfectly running psk and other HF digi modes in
>  > both linux and Windows.  In Windows all of them behave properly with
>  > 'normal' recommended settings.
>  >
>  > I only have the issue on my Ubuntu box and unfortunately, I don't have
>  > a different version of linux to compare with right now....though I
>  > think I may fix that soon just to work on this some more.
>  >
>  > What else have I done... in soundmodem I've used the tuning
>  > diagnostics and checked the signal levels and they also look good and
>  > clean, not overdriven on the RX and I monitor my TX packets with the
>  > very local BBS I test on and they sound nice and clean and at a
>  > comparable level to the other local traffic.
>  >
>  > _______________________________________________
>  > nos-bbs mailing list
>  > nos-bbs at lists.tapr.org
>  > https://lists.tapr.org/cgi-bin/mailman/listinfo/nos-bbs
>  >
>
>
>  _______________________________________________
>  nos-bbs mailing list
>  nos-bbs at lists.tapr.org
>  https://lists.tapr.org/cgi-bin/mailman/listinfo/nos-bbs
>