Removing NetworkManager is not necessary. However, I still think the bug
is NetworkManager. The MAC address cannot be changed while the interface
is up. The MAC address can be manually changed while NetworkManager is
running by disabling wireless in NetworkManager, and using a command
like the following to change the MAC address, before bringing wireless
back up and connecting:
ip link set dev "${interface}" address "${macaddr}"
I'm not sure if the kernel previously allowed MAC addresses to change
while the interface was up, or if NetworkManager previously brought
interfaces down, but either way, I think it's NetworkManager's
responsibility to bring the interface down before attempting a change in
the MAC address.
The reason seandepagnier's removal of NetworkManager works is because
the interfaces are down by default when a daemon like NetworkManager is
not active, so the MAC address changed with no problem.
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https://bugs.launchpad.net/bugs/1320752
Title:
MAC Spoofing / Cloning for WiFi is broken in Trusty 14.04 / 14.10 and
all others including Mint 17
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