Re: [gqrx] No audio FFT data

[Robin Gape]

Rick,

the difference between an AppImage and GQRX, plus dependencies, installed from packages, is that an eventual dependency of GQRX→GNU Radio→whatever installs a set of udev rules which set the rules for specific USB hardware. An AppImage (by its very nature) is unable^† to provide such a set of rules.

So:

1) what dongle hardware are you using?

2) have you set up a suitable udev rule for it?

3) did that dongle appear as a selectable item when you started GQRX?

3A) does it appear if you start GQRX with the -e command line argument (should throw up an edit box to select the SDR input device)?

HTH, 73, Stay Safe,

Robin, G8DQX

^†It could be done (but not necessarily totally cleanly), but would need a lot of jiggery-pokery, and the user would probably hate it.

On 04/03/2022 12:31, rick hatton wrote:

Opensuse 15.3

Gqrx-2.11.5-x86_64.AppImage

USB 2.0 HDTV Stick (RTL2832U)

When I start the AppImage from a terminal and start DSP i get :

No audio FFT data

The same dongle works in Debian Bullseye.

Can anyone suggest ways to fix this and any other information needed to diagnose/fix?

Thanks.

[rick hatton]

It's working now. The udev ruleset didn't have the correct device line.

Thanks for you info.

[Robin Gape]

Rick,

delighted to be able to help, and glad that you're back on the air, as it were. Remote diagnosis can be quite tricky!

73, Stay Safe,

Robin, G8DQX