New install with Ubuntu

[Rick, W4XA]

Howdy all, 

I'm having big problems getting FreeDV to work on my HP Pavilion dv5 laptop

Running Ubuntu

Distributor ID: Ubuntu
Description: Ubuntu 24.04.2 LTS
Release: 24.04
Codename: noble

Here's the current setup:

Pressing "TEST" is successful but the radio seems to be transmitting a multi-tone

In RECEIVE, I can switch between ANALOG and DIGITAL. In ANALOG, as expected, I can receive normal SSB audio from the computer speakers.  

I didn't try digital since no one was transmitting.

When I try to transmit, the radio switches to transmit, I get digital audio playing back in the computer speakers and I get the messages above. Then  the IC705 locks up in TX and has to be shut off/rebooted to get back to receive.

The HP dv5 I am using worked flawlessly running FreeDV with Winblows 10 Pro

Anyone see anything obvious?

Incidently, I am running OpenSuSE Tumbleweed (LINUX) on my (AMD 6-core) desktop and it works great with the Linux APPL.Image

73/Rick

W4XA

[Rick, W4XA]

Additionally, I  run a few hundred watts with the other computer.  haven't had an RFI problem at 500-600W

This problem occurs running only 2w, so I can probably rule out RFI.

[Mooneer Salem]

Hi Rick,

Not necessarily; the IC-705 is notorious for having RF go through the USB cable. Have you tried using wfview and the IC-705's Wi-Fi connection to see if that makes any difference?

Thanks,

-Mooneer K6AQ

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[Rick, W4XA]

Mooneer, 

Thanks for the quick reply.  I have had no problems whatsoever using the IC705 with a fairly long USB cable (and the same cable) connected to the MAC Book Pro (running Monterey) and my other desktop running SuSe Linux.  both work running at any power level from 1w to driving my Mercury III to about 600W

The above problem doesn't seem to be any different running either 1W or 100W.  Maybe it's something unique to the HP laptop.

[Rick, W4XA]

Just tried it now with the power turned all the way down to nothing and it does the same thing.

It must be some problem with this old laptop

I also installed WFView and am able to get it to connect to the radio but I don't see any audio choices to connect FreeDV to WFView.

[Mooneer Salem]

Hi Rick,

I think this was mentioned on the list before but you'll need to create some sort of virtual audio device if you're using wfview: https://wfview.org/wfview-user-manual/audio-configuration/.

Also, let's back up a bit. With the USB cable, you're able to control the frequency on the IC-705 from FreeDV, correct? If not, there might be bigger problems with the CAT configuration.

Thanks,

-Mooneer K6AQ

To view this discussion visit https://groups.google.com/d/msgid/digitalvoice/803f4a0e-0d89-4196-9e36-a5f5d260dfc7n%40googlegroups.com.

[Rick, W4XA]

Yes, 

I can control it with no problems.  It seems to be a problem with the USB audio codec.

[Mooneer Salem]

Hi Rick,

The symptoms really do sound like what happens with my IC-705 when RF gets into my laptop but you're already running at something like ~100mW with the 705's power level set to 0. I think you mentioned it previously, but just to make sure I understand correctly: does the Test button in Easy Setup cause a carrier to appear on the 705's display and properly key/unkey the radio (and it's just normal FreeDV operation causing problems)? Or does Easy Setup not work, either?

Thanks,

-Mooneer K6AQ

To view this discussion visit https://groups.google.com/d/msgid/digitalvoice/c5773302-ba53-4040-a0c7-6415de5567e0n%40googlegroups.com.

[Rick, W4XA]

Mooneer, 

I think it did and it only had the problem when I actually tried to transmit.  Then of course, it would lock the 705 in TX and I had to turn the radio off to get it to go back to receive.  Also, when I would transmit, it would appear to work breifly, and then the laptop speakers would start playing the digitized audio and it would immediately lock up the radio.

I also installed OpenSuSE tumbleweed in place of Ubuntu on the same laptop and had the same problem.

It's really sounding like a specific hardware problem with the old HP dv5 (Core i3 ) laptop.  Although, it did originally work well with WIN10 Pro.

I have a hard time believing that 100mw would cause the problem when I don't have the problem with the MacBook Pro (Monterey) running the same USB cable @ 500+ watts, or my desktop (different cable) running SuSE Tumbleweed up to 500W 

The laptop is pretty old (circa 2008 or so) .....so maybe the USB port plug is just worn out or something.

[Mooneer Salem]

Hi Rick,

There are also differences with the Python/NumPy/PyTorch packaged with the various versions of FreeDV that could be contributing. For example, the current macOS builds use PyTorch 2.2 and NumPy 1.x whereas most everything else uses PyTorch 2.7-2.8 and NumPy 2.x from what I can tell. (Plus, depending on the distro, even PyTorch and NumPy packages with the same versions could be built differently.) Given the vintage of the machine you're trying FreeDV on, I wouldn't be surprised if it was croaking trying to use some CPU feature it mistakenly thinks is supported (for example).

On that note, do you see the same behavior with the AppImage vs. using Barry's build script?

Thanks,

-Mooneer K6AQ

To view this discussion visit https://groups.google.com/d/msgid/digitalvoice/138d552e-8605-417b-a200-5ffb1a550965n%40googlegroups.com.

[Rick, W4XA]

Mooneer, 

That makes sense.  It is a rather old laptop. (Intel Corei3 2008 vintage) 

I only tried the script on the Macbook Pro running KDE NEON (KDE desktop with Ubuntu 22.04 under the hood)  and got an error saying it had to be "pure" Ubuntu.

I was going to try to figure out the differences when you came out with the Appl.image so I'm using that.   It works flawlessly on my SuSE (Tumbleweed) desktop

Now if we can just get K9AO to build and maintain an RPM on the OpenSuSE Build Service!! https://build.opensuse.org/

[Pierre Martel]

Those software are why I use to train an IA to decide Morse. Are you telling us that this mode use AI to decode the digital stream? 

To view this discussion visit https://groups.google.com/d/msgid/digitalvoice/CAAzDfxMcFeBjDHW3g5nAfFLG1LxOzyGx6fYeY-abSe94D36CXQ%40mail.gmail.com.

[Mooneer Salem]

Hi Pierre,

Yes, there is a machine language component. You can find more information at https://freedv.org/radio-autoencoder/.

Thanks,

-Mooneer K6AQ

To view this discussion visit https://groups.google.com/d/msgid/digitalvoice/CAL8dJwo9JvVNmsHtM9fXSU3E_yzj0uMozAEQHKvbQngP7wpyPQ%40mail.gmail.com.