昨天我安装了 Ubuntu 14.04 64 位 Daily Build，遇到了这个问题。13.10 中没有出现任何问题。我有一台配备 Intel Wifi 的 Dell Latitude D630，驱动程序：iwl4965。我尝试了http://www.webupd8.org/2013/01/fix-wireless-or-wired-network-not.html但它不起作用。以下是 sudo lshw -C network 的输出：
*-network
description: Wireless interface
product: PRO/Wireless 4965 AG or AGN [Kedron] Network Connection
vendor: Intel Corporation
physical id: 0
bus info: pci@0000:0c:00.0
logical name: wlan0
version: 61
serial: 00:1f:3b:d3:ce:01
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless
configuration: broadcast=yes driver=iwl4965 driverversion=3.13.0-18-generic firmware=228.61.2.24 ip=192.168.1.3 latency=0 link=yes multicast=yes wireless=IEEE 802.11abgn
resources: irq:44 memory:fe8fe000-fe8fffff