Gr-osmosdr + airspy random issue

GNU Radio
1

I use a airspy receiver with gr-osmosdr + gnuradio-companion.

Randomly, when I stop gnuradio execution, the following execution
freezes at startup (my QT GUI instruments are not displayed).

And on the next start I have the following error message:

FATAL: Failed to open AirSpy device (-5) AIRSPY_ERROR_NOT_FOUND

Everything goes back to operational state if I unplug/plug the airspy.

Looks like an improper airspy shutdown sequence when exiting gnuradio. I
do not experience this kind of problem with other software using airspy.

I have tried to add missing “airspy_exit()” at the end of
“~airspy_source_c”, but that does not solve the problem.

Any clue to help me investigate this issue ?
Thanks.

2

Some progress here: “~airspy_source_c” destructor seems to being called
when gnuradio is stopped.
I have to learn how gnuradio implements exit to call proper airspy
shutdown sequence.

3

GRC uses SIGKILL to terminate the flow graph, so no destructor is
called, and no sighandler can be binded.

Does anybody know how to modify this behavior of GRC ?