I have this bug as well in a clean MATE 16.04 install.
x220, Intel 6205 wireless . Using the firmware iwlwifi 18.168.6.1
Various things like #12 sudo iwlist wlan0 scan - does not work for me.
Also disabling Wireless and/or networking via Network Manager - and re-enabling does nothing.
Nor does using hardware on/off/on for wifi make a difference.
Rebooting fixes it.
I have tried this fix
http://ubuntuforums.org/showthread.php?t=1984317&page=3
[which is a seperate fix for the Intel Wireless hardware flaky WiFi connection - not related I feel]
Subsequently I have gone back to 14.04 MATE and works perfectly!
Is this a systemd issue perhaps?
I have this bug as well in a clean MATE 16.04 install.
x220, Intel 6205 wireless . Using the firmware iwlwifi 18.168.6.1
Various things like #12 sudo iwlist wlan0 scan - does not work for me.
Also disabling Wireless and/or networking via Network Manager - and re-enabling does nothing.
Nor does using hardware on/off/on for wifi make a difference.
Rebooting fixes it.
I have tried this fix
http:// ubuntuforums. org/showthread. php?t=1984317& page=3
[which is a seperate fix for the Intel Wireless hardware flaky WiFi connection - not related I feel]
Subsequently I have gone back to 14.04 MATE and works perfectly!
Is this a systemd issue perhaps?