No networks shown at all when using wash

[GoogleCodeExporter]

0. What version of Reaver are you using?  (Only defects against the latest
version will be considered.)
1.4(-2)

1. What operating system are you using (Linux is the only supported OS)?
Ubuntu 14.10.

2. Is your wireless card in monitor mode (yes/no)?
Yes.

3. What is the signal strength of the Access Point you are trying to crack?
N/A.

4. What is the manufacturer and model # of the device you are trying to
crack?
N/A.

5. What is the entire command line string you are supplying to reaver?
wash -i mon0

6. Please describe what you think the issue is.
When I run wash to scan for networks with WPS enabled, it doesn't show any 
networks. It simply stops printing anything after the 'header'.

From a freshly booted computer I stop all processes in advance which airmon-ng 
reports as troublesome (and bring wlan0 up, since stopping NetworkManager 
brings it down). I then turn wlan0 into monitoring mode and starts wash on that 
newly created interface. Nothing else, no mac spoofing or whatsoever. 

7. Paste the output from [wash] below.
Wash v1.4 WiFi Protected Setup Scan Tool
Copyright (c) 2011, Tactical Network Solutions, Craig Heffner 
<cheffner@tacnetsol.com>

BSSID                  Channel       RSSI       WPS Version       WPS Locked    
    ESSID
--------------------------------------------------------------------------------
-------------------------------

tcpdump: 
https://mega.co.nz/#!zBQTUaDR!4wJ3KUOAY6YzX9rn09XTvq3WEj16_D8XYE_3ukc3kG4

Original issue reported on code.google.com by just1ce...@gmail.com on 12 Feb 2015 at 10:01

[GoogleCodeExporter]

Turned out to be that bringing up the wlan0 interface is what causes the 
problem. Bringing it down again (or not even bothering bringing it up) makes 
the problem go away. 

Hopefully others will find this solution helpful. I myself couldn't find any 
solution form either googling nor from reading the help. 

Original comment by just1ce...@gmail.com on 26 Feb 2015 at 10:19