Hi,
I'm using the last sniffer package named nRF-sniffer_2.0.0-beta-1_51296aa with a nRF51 Dongle ([https://www.nordicsemi.com/eng/Products/nRF51-Dongle]). My PC is running Ubuntu 12.04 with Wireshark 2.4.3. I saw the nRF Sniffer in interface list on Wireshark but when I start a capture a pop-up window say "No packets captured. As no data was captured, closing the temporary capture file".