我（Linux 新手）有一台 Dell XPS 17，并尝试安装 Ubuntu 12.04。安装后，附近的所有 WLAN 接入点都已检测到。但我无法连接（但我能够连接到其他计算机以及 Windows 下的 Dell XPS 17）。输出：
系统配置
lo no wireless extensions.
wlan0 IEEE 802.11bg ESSID:"LerchenPoint"
Mode:Managed Frequency:2.412 GHz Access Point: 58:6D:8F:A0:2D:58
Bit Rate=1 Mb/s Tx-Power=14 dBm
Retry long limit:7 RTS thr:off Fragment thr:off
Power Management:off
Link Quality=70/70 Signal level=-37 dBm
Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
Tx excessive retries:0 Invalid misc:19 Missed beacon:0
eth0 no wireless extensions.
sudo lshw-类网络
*-network
description: Wireless interface
product: Centrino Wireless-N 1000
vendor: Intel Corporation
physical id: 0
bus info: pci@0000:04:00.0
logical name: wlan0
version: 00
serial: 00:26:c7:99:98:28
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless
configuration: broadcast=yes driver=iwlwifi driverversion=3.2.0-24-generic firmware=39.31.5.1 build 35138 latency=0 link=no multicast=yes wireless=IEEE 802.11bg
resources: irq:50 memory:f0400000-f0401fff
*-network
description: Ethernet interface
product: RTL8111/8168B PCI Express Gigabit Ethernet controller
vendor: Realtek Semiconductor Co., Ltd.
physical id: 0
bus info: pci@0000:0a:00.0
logical name: eth0
version: 06
serial: f0:4d:a2:56:e3:94
size: 1Gbit/s
capacity: 1Gbit/s
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress msix vpd bus_master cap_list ethernet physical tp
mii 10bt 10bt-fd 100bt 100bt-fd 1000bt 1000bt-fd autonegotiation
configuration: autonegotiation=on broadcast=yes driver=r8169 driverversion=2.3LK-NAPI duplex=full firmware=rtl_nic/rtl8168e-2.fw ip=192.168.0.123 latency=0 link=yes multicast=yes port=MII speed=1Gbit/s
resources: irq:47 ioport:6000(size=256) memory:f0a04000-f0a04fff memory:f0a00000-f0a03fff
消息 |查找
[ 10.157531] iwlwifi 0000:04:00.0: PCI INT A -> GSI 17 (level, low) -> IRQ 17
[ 10.157561] iwlwifi 0000:04:00.0: setting latency timer to 64
[ 10.157598] iwlwifi 0000:04:00.0: pci_resource_len = 0x00002000
[ 10.157599] iwlwifi 0000:04:00.0: pci_resource_base = ffffc90011090000
[ 10.157601] iwlwifi 0000:04:00.0: HW Revision ID = 0x0
[ 10.157731] iwlwifi 0000:04:00.0: irq 50 for MSI/MSI-X
[ 10.157834] iwlwifi 0000:04:00.0: Detected Intel(R) Centrino(R) Wireless-N 1000 BGN, REV=0x6C
[ 10.157976] iwlwifi 0000:04:00.0: L1 Enabled; Disabling L0S
[ 10.179772] iwlwifi 0000:04:00.0: device EEPROM VER=0x15d, CALIB=0x6
[ 10.179775] iwlwifi 0000:04:00.0: Device SKU: 0X50
[ 10.179777] iwlwifi 0000:04:00.0: Valid Tx ant: 0X1, Valid Rx ant: 0X3
[ 10.179796] iwlwifi 0000:04:00.0: Tunable channels: 13 802.11bg, 0 802.11a channels
[ 10.574728] iwlwifi 0000:04:00.0: loaded firmware version 39.31.5.1 build 35138
[ 10.726409] ieee80211 phy0: Selected rate control algorithm 'iwl-agn-rs'
[ 19.714132] iwlwifi 0000:04:00.0: L1 Enabled; Disabling L0S
[ 19.777862] iwlwifi 0000:04:00.0: L1 Enabled; Disabling L0S
[ 2251.603089] iwlwifi 0000:04:00.0: PCI INT A disabled
[ 2266.578350] iwlwifi 0000:04:00.0: PCI INT A -> GSI 17 (level, low) -> IRQ 17
[ 2266.578399] iwlwifi 0000:04:00.0: setting latency timer to 64
[ 2266.578435] iwlwifi 0000:04:00.0: pci_resource_len = 0x00002000
[ 2266.578437] iwlwifi 0000:04:00.0: pci_resource_base = ffffc90011090000
[ 2266.578439] iwlwifi 0000:04:00.0: HW Revision ID = 0x0
[ 2266.578704] iwlwifi 0000:04:00.0: irq 50 for MSI/MSI-X
[ 2266.578808] iwlwifi 0000:04:00.0: Detected Intel(R) Centrino(R) Wireless-N 1000 BGN, REV=0x6C
[ 2266.578916] iwlwifi 0000:04:00.0: L1 Enabled; Disabling L0S
[ 2266.600709] iwlwifi 0000:04:00.0: device EEPROM VER=0x15d, CALIB=0x6
[ 2266.600712] iwlwifi 0000:04:00.0: Device SKU: 0X50
[ 2266.600713] iwlwifi 0000:04:00.0: Valid Tx ant: 0X1, Valid Rx ant: 0X3
[ 2266.600727] iwlwifi 0000:04:00.0: Tunable channels: 13 802.11bg, 0 802.11a channels
[ 2266.605978] iwlwifi 0000:04:00.0: loaded firmware version 39.31.5.1 build 35138
[ 2266.606331] ieee80211 phy0: Selected rate control algorithm 'iwl-agn-rs'
[ 2266.614179] iwlwifi 0000:04:00.0: L1 Enabled; Disabling L0S
[ 2266.681541] iwlwifi 0000:04:00.0: L1 Enabled; Disabling L0S
我尝试过的解决方案：
rfkill 列出全部
0: dell-wifi: Wireless LAN
Soft blocked: no
Hard blocked: no
2: phy0: Wireless LAN
Soft blocked: no
Hard blocked: no
回显“选项 iwlwifi 11n_disable=1”| sudo tee /etc/modprobe.d/iwlwifi.conf
options iwlwifi 11n_disable=1
sudo modprobe -rfv iwlwifi
WARNING: All config files need .conf: /etc/modprobe.d/blacklist, it will be
ignored in a future release.
rmmod /lib/modules/3.2.0-24-generic/kernel/drivers/net/wireless/iwlwifi/iwlwifi.ko
rmmod /lib/modules/3.2.0-24-generic/kernel/net/mac80211/mac80211.ko
rmmod /lib/modules/3.2.0-24-generic/kernel/net/wireless/cfg80211.ko
sudo modprobe iwlwifi
WARNING: All config files need .conf: /etc/modprobe.d/blacklist, it will be
ignored in a future release.
将 iwlwifi-1000-5.ucode（当前驱动程序）替换为 iwlwifi-1000-3.ucode
sudo jockey-gtk：
(jockey-gtk:2493): Gtk-CRITICAL **: gtk_icon_set_render_icon_pixbuf: assertion icon_set != NULL' failed (jockey-gtk:2493): Gtk-CRITICAL **: gtk_icon_set_render_icon_pixbuf: assertion icon_set != NULL' failed
“附加驱动程序” (德语：“Zusätzliche Treiber”) 中没有列出任何内容。
gksudo gedit /etc/modprobe.d/blacklist.conf
添加“黑名单 acer_wmi”
任何帮助都将非常感激。
谢谢！！
答案1
在执行所有这些操作之前，请检查您的 BIOS 设置。
我有同样的机器，每隔一段时间它就会报告无线已被硬件开关禁用。
仅当我插入以太网有线连接并暂停机器，然后唤醒它并仅希望使用无线时，才会发生这种情况。
键盘上方的无线“按钮”无法将其重新打开，因此我必须进入 BIOS 重新启用它。保存、重新启动，在网络连接中启用无线，一切恢复正常。
答案2
我有一台戴尔 XPS 17 (l702x)，上面有 n-1000，我想让它在 Ubuntu 12.04 下运行（安装后）。因此，大量借用这个帖子：
修复似乎涉及降级 n-1000 的固件。
请使用以下方式降级固件iwlwifi-1000-ucode-128.50.3.1.tgz（为方便起见，请将其保存到桌面）。您可以右键单击它并选择“提取”，或者在终端提示符下发出以下命令：
tar xzvf ~/Desktop/iwlwifi-1000-ucode-128.50.3.1.tgz
再次在终端中备份当前固件：
sudo mv /lib/firmware/iwlwifi-1000-5.ucode /lib/firmware/iwlwifi-1000-5.bak
现在复制下载的固件：
cd Desktop/iwlwifi-1000-ucode-128.50.3.1/
cp iwlwifi-1000-3.ucode iwlwifi-1000-5.ucode
sudo cp iwlwifi-1000-5.ucode /lib/firmware
sudo modprobe -r iwlagn
sudo modprobe iwlagn
现在让我们看看幕后发生了什么：
dmesg | tail -n20
这已在原始帖子，并且据说是一个永久性的修复（即重启后仍然有效）。
祝你好运！