我正在使用 Windows 10 双启动。Windows 上的 Wifi 运行正常。
笔记本型号：联想 Legion Y530-15ICH
大约 2 个月以来，Ubuntu 上的 wifi 一直没有问题。昨天我尝试连接新的 wifi，第一次尝试时密码拼写不正确。几分钟后，wifi 菜单从设置中消失了。
以下是我尝试过的一些命令的结果：
ifconfig：
michal@Legion:~$ ifconfig
br-d478e4b92f5a: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 172.19.0.1 netmask 255.255.0.0 broadcast 172.19.255.255
inet6 fe80::42:77ff:fe5a:9982 prefixlen 64 scopeid 0x20<link>
ether 02:42:77:5a:99:82 txqueuelen 0 (Ethernet)
RX packets 27 bytes 756 (756.0 B)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 431 bytes 57770 (57.7 KB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
docker0: flags=4099<UP,BROADCAST,MULTICAST> mtu 1500
inet 172.17.0.1 netmask 255.255.0.0 broadcast 172.17.255.255
ether 02:42:7d:fd:05:05 txqueuelen 0 (Ethernet)
RX packets 0 bytes 0 (0.0 B)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 0 bytes 0 (0.0 B)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
enp8s0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 192.168.100.166 netmask 255.255.255.0 broadcast 192.168.100.255
inet6 fe80::e23d:98d6:1413:df9b prefixlen 64 scopeid 0x20<link>
ether e8:6a:64:72:fb:4f txqueuelen 1000 (Ethernet)
RX packets 20050 bytes 8166760 (8.1 MB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 13548 bytes 2488670 (2.4 MB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
lo: flags=73<UP,LOOPBACK,RUNNING> mtu 65536
inet 127.0.0.1 netmask 255.0.0.0
inet6 ::1 prefixlen 128 scopeid 0x10<host>
loop txqueuelen 1000 (Local Loopback)
RX packets 5729 bytes 491310 (491.3 KB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 5729 bytes 491310 (491.3 KB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
veth0c7b145: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet6 fe80::54a4:d7ff:fed0:39c4 prefixlen 64 scopeid 0x20<link>
ether 56:a4:d7:d0:39:c4 txqueuelen 0 (Ethernet)
RX packets 345 bytes 22320 (22.3 KB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 765 bytes 83702 (83.7 KB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
veth5369aec: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet6 fe80::7897:54ff:fe99:37f5 prefixlen 64 scopeid 0x20<link>
ether 7a:97:54:99:37:f5 txqueuelen 0 (Ethernet)
RX packets 11 bytes 772 (772.0 B)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 589 bytes 67742 (67.7 KB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
veth889aba9: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet6 fe80::5031:2aff:fe9f:61d9 prefixlen 64 scopeid 0x20<link>
ether 52:31:2a:9f:61:d9 txqueuelen 0 (Ethernet)
RX packets 0 bytes 0 (0.0 B)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 579 bytes 67032 (67.0 KB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
virbr0: flags=4099<UP,BROADCAST,MULTICAST> mtu 1500
inet 192.168.122.1 netmask 255.255.255.0 broadcast 192.168.122.255
ether 52:54:00:be:4e:46 txqueuelen 1000 (Ethernet)
RX packets 0 bytes 0 (0.0 B)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 0 bytes 0 (0.0 B)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
配置：
michal@Legion:~$ iwconfig
lo no wireless extensions.
enp8s0 no wireless extensions.
virbr0 no wireless extensions.
virbr0-nic no wireless extensions.
docker0 no wireless extensions.
br-d478e4b92f5a no wireless extensions.
veth5369aec no wireless extensions.
veth0c7b145 no wireless extensions.
veth889aba9 no wireless extensions.
lspci：
michal@Legion:~$ lspci
00:00.0 Host bridge: Intel Corporation 8th Gen Core 4-core Processor Host Bridge/DRAM Registers [Coffee Lake H] (rev 07)
00:01.0 PCI bridge: Intel Corporation Xeon E3-1200 v5/E3-1500 v5/6th Gen Core Processor PCIe Controller (x16) (rev 07)
00:02.0 VGA compatible controller: Intel Corporation UHD Graphics 630 (Mobile)
00:04.0 Signal processing controller: Intel Corporation Xeon E3-1200 v5/E3-1500 v5/6th Gen Core Processor Thermal Subsystem (rev 07)
00:08.0 System peripheral: Intel Corporation Xeon E3-1200 v5/v6 / E3-1500 v5 / 6th/7th/8th Gen Core Processor Gaussian Mixture Model
00:12.0 Signal processing controller: Intel Corporation Cannon Lake PCH Thermal Controller (rev 10)
00:14.0 USB controller: Intel Corporation Cannon Lake PCH USB 3.1 xHCI Host Controller (rev 10)
00:14.2 RAM memory: Intel Corporation Cannon Lake PCH Shared SRAM (rev 10)
00:15.0 Serial bus controller [0c80]: Intel Corporation Cannon Lake PCH Serial IO I2C Controller #0 (rev 10)
00:15.1 Serial bus controller [0c80]: Intel Corporation Cannon Lake PCH Serial IO I2C Controller #1 (rev 10)
00:16.0 Communication controller: Intel Corporation Cannon Lake PCH HECI Controller (rev 10)
00:17.0 SATA controller: Intel Corporation Cannon Lake Mobile PCH SATA AHCI Controller (rev 10)
00:1d.0 PCI bridge: Intel Corporation Cannon Lake PCH PCI Express Root Port #9 (rev f0)
00:1d.4 PCI bridge: Intel Corporation Cannon Lake PCH PCI Express Root Port #13 (rev f0)
00:1d.5 PCI bridge: Intel Corporation Cannon Lake PCH PCI Express Root Port #14 (rev f0)
00:1e.0 Communication controller: Intel Corporation Cannon Lake PCH Serial IO UART Host Controller (rev 10)
00:1f.0 ISA bridge: Intel Corporation HM470 Chipset LPC/eSPI Controller (rev 10)
00:1f.3 Audio device: Intel Corporation Cannon Lake PCH cAVS (rev 10)
00:1f.4 SMBus: Intel Corporation Cannon Lake PCH SMBus Controller (rev 10)
00:1f.5 Serial bus controller [0c80]: Intel Corporation Cannon Lake PCH SPI Controller (rev 10)
01:00.0 VGA compatible controller: NVIDIA Corporation GP107M [GeForce GTX 1050 Mobile] (rev a1)
08:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller (rev 15)
rfkill 列出全部：
michal@Legion:~$ rfkill list all
0: hci0: Bluetooth
Soft blocked: no
Hard blocked: no
我尝试过的：
- 检查 BIOS 中是否允许使用 wifi
- 重新安装驱动程序：Ubuntu 20.04.2 LTS 没有 WiFi
- 全新 Ubuntu 16.04 上 Wifi 无法使用- 这不起作用，但这可能与此有关，因为问题出在类似的笔记本电脑型号上。