v 2,.8 freezing in Ubuntu 16.04

[coupdemistral]

I just installed on a new machine (I am successfully running previous versions of Gqrx on another machine with Ubuntu 14 and on a Mac) and the program freezes upon launching the DSP Processing.

- running Ubuntu 16.04 

- installed using instructions here 

- using Funcube Dongle v2_0 (same as used on other machines successfully)

- when I hit the DSP processing icon, the green dB meeter shoots up to the end of scale and then nothing happens (no sound, no waterfall etc.)  

- no errors reported in logs, except when I click on the DSP Prcessor, the log displays a running sequence of 

aONo audio FFT data.

aOaONo audio FFT data.

aONo audio FFT data.

aONo audio FFT data.

upon clicking to stop DSP, the output turns into a running sequence of aOaOaOaOaOaOa...

- I have seen other threads that talk about how 16.10 is not supported, but I understand 16.04 should be. I have also gone back and tried the same dongle on my other Ubuntu and Mac and it works fine. 

I appreciate anyone's help on this. This machine is destined to a boat that is leaving soon for an ocean cruise, so i hope I can get it to work!

[Alexandru Csete]

Hi,

All released and supported versions of Ubuntu should work using the
PPA, i.e. up to and including 17.04. Only USRPs do not work since
16.10.

Since you are using a Funcube Dongle Pro+ (V2) on a different PC
hardware, a safe guess is that it is the known "USB bandwidth" limit
bug you run into:
https://github.com/csete/gqrx/issues/91

You can try different USB ports and you could also try the latest Ubuntu 17.04.

Alex

[coupdemistral]

Thanks Alex

Indeed, I get the bandwidth error when I run dmesg. 

I tried all the ports available but no joy. I may just bite the bullet and upgrade to Ubuntu 17.04

[Alexandru Csete]

Unfortunately, there is no guarantee that it will help. Ubuntu 16.04
has already a rather new kernel 4.10 if you enable the HWE stack, see:
https://wiki.ubuntu.com/Kernel/LTSEnablementStack

You may as well try that first.

Alex

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