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在 Ubuntu 18.04 上未找到 Wi-Fi 适配器

tag-icon • tag-icon networking drivers 18.04
在 Ubuntu 18.04 上未找到 Wi-Fi 适配器

今天我在一台全新的电脑上安装了 Ubuntu 18.04 LTS，虽然安装过程很顺利，但我无法通过 WiFi 连接到互联网。首先，我以为这只是手动启用 WiFi 的问题，所以我进入设置并看到一条通知：“未找到 Wi-Fi 适配器”。我进行了一些谷歌搜索，并尝试执行描述的所有步骤这里，但它仍然不起作用。

命令lspci -knn | grep Net -A3; rfkill list返回：

00:14.3 Network controller [0280]: Intel Corporation Wireless-AC 9560 [Jefferson Peak] [8086:a370] (rev 10)
    Subsystem: Intel Corporation Device [8086:0034]
    Kernel driver in use: iwlwifi
    Kernel modules: iwlwifi, wl
0: ideapad_wlan: Wireless LAN
    Soft blocked: no
    Hard blocked: yes
1: ideapad_bluetooth: Bluetooth
    Soft blocked: no
    Hard blocked: yes
2: hci0: Bluetooth
    Soft blocked: no
    Hard blocked: no
3: phy0: Wireless LAN
    Soft blocked: no
    Hard blocked: no

并lshw -C network返回：

  *-network DISABLED        
       description: Wireless interface
       product: Wireless-AC 9560 [Jefferson Peak]
       vendor: Intel Corporation
       physical id: 14.3
       bus info: pci@0000:00:14.3
       logical name: wlp0s20f3
       version: 10
       serial: 0c:dd:24:2c:af:83
       width: 64 bits
       clock: 33MHz
       capabilities: pm msi pciexpress msix bus_master cap_list ethernet physical wireless
       configuration: broadcast=yes driver=iwlwifi driverversion=5.0.0-23-generic firmware=43.95eb4e97.0 latency=0 link=no multicast=yes wireless=IEEE 802.11
       resources: irq:16 memory:b4518000-b451bfff
  *-network
       description: Ethernet interface
       product: RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller
       vendor: Realtek Semiconductor Co., Ltd.
       physical id: 0
       bus info: pci@0000:07:00.0
       logical name: enp7s0
       version: 15
       serial: 98:fa:9b:a0:b0:cc
       size: 10Mbit/s
       capacity: 1Gbit/s
       width: 64 bits
       clock: 33MHz
       capabilities: pm msi pciexpress msix bus_master cap_list ethernet physical tp mii 10bt 10bt-fd 100bt 100bt-fd 1000bt-fd autonegotiation
       configuration: autonegotiation=on broadcast=yes driver=r8169 duplex=half firmware=rtl8168h-2_0.0.2 02/26/15 latency=0 link=no multicast=yes port=MII speed=10Mbit/s
       resources: irq:17 ioport:3000(size=256) memory:b4304000-b4304fff memory:b4300000-b4303fff
  *-network
       description: Ethernet interface
       physical id: 3
       logical name: enp0s20f0u2
       serial: 12:7f:41:92:a5:de
       capabilities: ethernet physical
       configuration: broadcast=yes driver=rndis_host driverversion=22-Aug-2005 firmware=RNDIS device ip=192.168.42.47 link=yes multicast=yes

我还能做些什么来让事情顺利进行？

答案1

在终端中运行

sudo tee /etc/modprobe.d/blacklist-ideapad.conf <<< "blacklist ideapad_laptop"

然后重新启动。

解释：

如您所见，无线设备已被“硬件阻止” rfkill。

0: ideapad_wlan: Wireless LAN
    Soft blocked: no
    Hard blocked: yes

新的 Ideapad 笔记本电脑没有硬件无线开关，ideapad_laptop内核模块认为开关处于关闭状态。

因此我们禁用该模块，Wi-Fi 就可以正常工作。

内核开发人员将新的笔记本电脑型号添加到需要模块特性的列表中。但新型号出现的速度比添加的速度要快。

如果你有兴趣，你可以向上游发送补丁;-)

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