我的规格
sudo lshw -C network
*-network DEAKTIVIERT
Beschreibung: Kabellose Verbindung
Produkt: Centrino Wireless-N 2230
Hersteller: Intel Corporation
Physische ID: 0
Bus-Informationen: pci@0000:03:00.0
Logischer Name: wlan0
Version: c4
Seriennummer: 60:36:dd:0f:cb:52
Breite: 64 bits
Takt: 33MHz
Fähigkeiten: pm msi pciexpress bus_master cap_list ethernet physical wireless
Konfiguration: broadcast=yes driver=iwlwifi driverversion=3.5.0-27-generic firmware=18.168.6.1 latency=0 link=no multicast=yes wireless=IEEE 802.11bgn
Ressourcen: irq:46 memory:f4700000-f4701fff
以下是我迄今为止尝试过的方法
我检查了是否存在硬件或软件块，没有：
rfkill list
0: tpacpi_bluetooth_sw: Bluetooth
Soft blocked: no
Hard blocked: no
1: phy0: Wireless LAN
Soft blocked: no
Hard blocked: no
2: hci0: Bluetooth
Soft blocked: no
Hard blocked: no
我尝试清理接口文件
gksu gedit /etc/network/interfaces
但文件中除了以下内容外没有写任何内容：
auto lo
iface lo inet loopback
我检查了“iwlwifi”模块是否已加载，但我不确定输出的含义。
lsmod |grep iwlwifi
iwlwifi 399576 0
mac80211 555272 1 iwlwifi
cfg80211 208382 2 iwlwifi,mac80211
我假设输出第一行的“0”表示“iwlwifi”未加载。所以我尝试使用“modprobe”命令运行“iwlwifi”。
sudo modprobe iwlwifi -r
sudo modprobe iwlwifi 11n_disable=0
我在这台机器上安装了 Windows 双启动系统，在 Windows 中，wifi 运行正常。路由器显然也能正常工作。
我不知道这是否重要，但几天前我通过编辑 rc.local 默认禁用了蓝牙
rfkill block bluetooth
（但接下来的两天 wifi 都可以用）
几天前我也安装了 VirtualBox（因为我读过有关安装 VBox 后出现网络问题的文章，所以我想提一下），但只尝试以客户身份安装 Windows 7。虽然看不到 nm-applet 的符号，但我检查了要安装的 synaptic 包管理器和 nm seams。
非常感激你的帮助。
PS：部分输出为德语。DEAKTIVIERT（在 lshw 命令之后）表示已禁用，其他所有内容似乎都是正常输出。
检查消息日志：
dmesg | grep iwl
[ 3.427995] iwlwifi: Intel(R) Wireless WiFi Link AGN driver for Linux, in-tree:
[ 3.427999] iwlwifi: Copyright(c) 2003-2012 Intel Corporation
[ 3.428189] iwlwifi 0000:03:00.0: pci_resource_len = 0x00002000
[ 3.428193] iwlwifi 0000:03:00.0: pci_resource_base = ffffc900057bc000
[ 3.428196] iwlwifi 0000:03:00.0: HW Revision ID = 0xC4
[ 3.428350] iwlwifi 0000:03:00.0: irq 46 for MSI/MSI-X
[ 3.618390] iwlwifi 0000:03:00.0: loaded firmware version 18.168.6.1
[ 3.618701] iwlwifi 0000:03:00.0: CONFIG_IWLWIFI_DEBUG disabled
[ 3.618707] iwlwifi 0000:03:00.0: CONFIG_IWLWIFI_DEBUGFS enabled
[ 3.618710] iwlwifi 0000:03:00.0: CONFIG_IWLWIFI_DEVICE_TRACING enabled
[ 3.618712] iwlwifi 0000:03:00.0: CONFIG_IWLWIFI_DEVICE_TESTMODE enabled
[ 3.618715] iwlwifi 0000:03:00.0: CONFIG_IWLWIFI_P2P disabled
[ 3.618719] iwlwifi 0000:03:00.0: Detected Intel(R) Centrino(R) Wireless-N 2230 BGN, REV=0xC8
[ 3.618840] iwlwifi 0000:03:00.0: L1 Enabled; Disabling L0S
[ 3.637741] iwlwifi 0000:03:00.0: device EEPROM VER=0x81c, CALIB=0x6
[ 3.637748] iwlwifi 0000:03:00.0: Device SKU: 0x150
[ 3.637752] iwlwifi 0000:03:00.0: Valid Tx ant: 0x3, Valid Rx ant: 0x3
[ 3.637777] iwlwifi 0000:03:00.0: Tunable channels: 13 802.11bg, 0 802.11a channels
[ 3.652582] ieee80211 phy0: Selected rate control algorithm 'iwl-agn-rs'
[ 74.692031] iwlwifi: Intel(R) Wireless WiFi Link AGN driver for Linux, in-tree:
[ 74.692034] iwlwifi: Copyright(c) 2003-2012 Intel Corporation
[ 74.692146] iwlwifi 0000:03:00.0: pci_resource_len = 0x00002000
[ 74.692148] iwlwifi 0000:03:00.0: pci_resource_base = ffffc900057bc000
[ 74.692150] iwlwifi 0000:03:00.0: HW Revision ID = 0xC4
[ 74.692276] iwlwifi 0000:03:00.0: irq 46 for MSI/MSI-X
[ 74.696282] iwlwifi 0000:03:00.0: loaded firmware version 18.168.6.1
[ 74.696623] iwlwifi 0000:03:00.0: CONFIG_IWLWIFI_DEBUG disabled
[ 74.696628] iwlwifi 0000:03:00.0: CONFIG_IWLWIFI_DEBUGFS enabled
[ 74.696631] iwlwifi 0000:03:00.0: CONFIG_IWLWIFI_DEVICE_TRACING enabled
[ 74.696634] iwlwifi 0000:03:00.0: CONFIG_IWLWIFI_DEVICE_TESTMODE enabled
[ 74.696637] iwlwifi 0000:03:00.0: CONFIG_IWLWIFI_P2P disabled
[ 74.696641] iwlwifi 0000:03:00.0: Detected Intel(R) Centrino(R) Wireless-N 2230 BGN, REV=0xC8
[ 74.696752] iwlwifi 0000:03:00.0: L1 Enabled; Disabling L0S
[ 74.713452] iwlwifi 0000:03:00.0: device EEPROM VER=0x81c, CALIB=0x6
[ 74.713456] iwlwifi 0000:03:00.0: Device SKU: 0x150
[ 74.713458] iwlwifi 0000:03:00.0: Valid Tx ant: 0x3, Valid Rx ant: 0x3
[ 74.713475] iwlwifi 0000:03:00.0: Tunable channels: 13 802.11bg, 0 802.11a channels
[ 74.713774] ieee80211 phy0: Selected rate control algorithm 'iwl-agn-rs'