I don't know if this is a known issue, but it appears that every time I try to do injection test aireplay-ng -9 wifi0 the whole system crashes.
it is repeatable on my laptop and it ALWAYS happens on the second found AP on the 7th ping.

can somebody enlighten me about this one please?
thanx

PS: everything else I have done with aircrack-ng seems to be working now though.