NetworkManager takes over wireless connection even if “roaming mode” is disabled

Binary package hint: network-manager

I have network-manager 0.6.4-6ubuntu3 on Feisty, but it doesn’t work with my wireless card <http://bugzilla.gnome.org/show_bug.cgi?id=410713>, so until this gets fixed I want NM to leave my wireless connection alone.

If I go to Static configuration… → Wireless connection → Properties, deselect “Enable roaming mode”, and configure it for DHCP, then network-admin writes the appropriate stanzas to /etc/network/interfaces so that the connection is brought up properly at boot. The problem is that as soon as NM starts, it takes over the connection anyway and breaks it, instead of ignoring the device like it’s supposed to when “roaming mode” is disabled.

(I can restore a working connection by unchecking “Enable wireless” from the NM menu and manually restarting networking—but I have to do this on every boot because NM doesn’t remember that setting.)