Well, I blacklisted the module 'acer_wmi', and Gnome&KDE network management utilities started working again. I only needed to create this file :
$ cat /etc/modprobe.d/blacklist-acer.conf blacklist acer_wmi -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/689529 Title: Unable to enable wireless, "More" button disappears (Kubuntu natty) -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs