** Description changed:

  This is quite simple. I used to split my wifi network with:
  
        sudo iw dev wlan0 interface add wlan1 type station
  
  ...and it used to work (at least on some machine). Now if I do the same
  I have:
  
         kernel: [31130.438726] systemd-udevd[24264]: renamed network
  interface wlan1 to rename4
  
- ...and "rename4" is not recognized at all as a wifi interface.
+ ...and "rename4" is not recognized at all as a wifi interface. The
+ problem probably stems from the fact that the MAC address is the same...
  
  I have no biosdevname package installed.
  
  Any help will be appreciated.
  
  System is Ubuntu 14.04 up-to-date.
  [romano:~] % uname -a
  Linux RRyS 3.13.0-40-generic #69-Ubuntu SMP Thu Nov 13 17:53:56 UTC 2014 
x86_64 x86_64 x86_64 GNU/Linux
  [romano:~] % wajig status udev
  Package                 Installed       Previous        Now             State
  =======================-===============-===============-===============-=====
  udev                  204-5ubuntu20.8 204-5ubuntu20.8 204-5ubuntu20.8 install
+ 
+ eth0      Link encap:Ethernet  HWaddr 90:2b:34:a4:fe:3e  
+           UP BROADCAST MULTICAST  MTU:1500  Metric:1
+           RX packets:0 errors:0 dropped:0 overruns:0 frame:0
+           TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
+           collisions:0 txqueuelen:1000 
+           RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)
+ 
+ lo        Link encap:Local Loopback  
+           inet addr:127.0.0.1  Mask:255.0.0.0
+           inet6 addr: ::1/128 Scope:Host
+           UP LOOPBACK RUNNING  MTU:65536  Metric:1
+           RX packets:47134 errors:0 dropped:0 overruns:0 frame:0
+           TX packets:47134 errors:0 dropped:0 overruns:0 carrier:0
+           collisions:0 txqueuelen:0 
+           RX bytes:20940311 (20.9 MB)  TX bytes:20940311 (20.9 MB)
+ 
+ rename4   Link encap:Ethernet  HWaddr 64:70:02:d9:f4:f7  
+           BROADCAST MULTICAST  MTU:1500  Metric:1
+           RX packets:0 errors:0 dropped:0 overruns:0 frame:0
+           TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
+           collisions:0 txqueuelen:1000 
+           RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)
+ 
+ rename5   Link encap:Ethernet  HWaddr 64:70:02:d9:f4:f7  
+           BROADCAST MULTICAST  MTU:1500  Metric:1
+           RX packets:0 errors:0 dropped:0 overruns:0 frame:0
+           TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
+           collisions:0 txqueuelen:1000 
+           RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)
+ 
+ wlan0     Link encap:Ethernet  HWaddr 64:70:02:d9:f4:f7  
+           inet addr:192.168.1.222  Bcast:192.168.1.255  Mask:255.255.255.0
+           inet6 addr: fe80::6670:2ff:fed9:f4f7/64 Scope:Link
+           UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
+           RX packets:213408 errors:0 dropped:0 overruns:0 frame:0
+           TX packets:214770 errors:0 dropped:0 overruns:0 carrier:0
+           collisions:0 txqueuelen:1000 
+           RX bytes:137642894 (137.6 MB)  TX bytes:54703374 (54.7 MB)

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https://bugs.launchpad.net/bugs/1397654

Title:
  Adding a virtual wireless interface is broken

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