我在戴尔 Latitude 4580 笔记本电脑上安装了 Ubuntu 20.04。我的蓝牙运行良好，但当我尝试打开 wifi 时，却什么也得不到。
mohammed@mohammed:~$ sudo nmcli device
[sudo] password for mohammed:
DEVICE TYPE STATE CONNECTION
enp0s31f6 ethernet connected netplan-enp0s31f6
lo loopback unmanaged --
对于命令的输出lshw -businfo：
Bus info Device Class Description
=======================================================
system Latitude 5480 (07A7)
bus 05Y099
memory 64KiB BIOS
memory 16GiB System Memory
memory 8GiB SODIMM DDR4 Synchronous Unbuffered (Unregistered) 2400 MHz (0.4 ns)
memory 8GiB SODIMM DDR4 Synchronous Unbuffered (Unregistered) 2400 MHz (0.4 ns)
memory 128KiB L1 cache
memory 512KiB L2 cache
memory 3MiB L3 cache
cpu@0 processor Intel(R) Core(TM) i5-7300U CPU @ 2.60GHz
pci@0000:00:00.0 bridge Xeon E3-1200 v6/7th Gen Core Processor
Host Bridge/DRAM Registers
pci@0000:00:02.0 display HD Graphics 620
pci@0000:00:04.0 generic Xeon E3-1200 v5/E3-1500 v5/6th Gen Core
Processor Thermal Subsystem
pci@0000:00:14.0 bus Sunrise Point-LP USB 3.0 xHCI Controller
usb@1 usb1 bus xHCI Host Controller
usb@1:3 multimedia CPH1989
usb@1:5 multimedia Integrated_Webcam_HD
usb@1:7 communication Bluetooth wireless interface
usb@1:8 input LGDisplay Incell Touch
usb@1:a generic 5880
usb@2 usb2 bus xHCI Host Controller
pci@0000:00:14.2 generic Sunrise Point-LP Thermal subsystem
pci@0000:00:15.0 generic Sunrise Point-LP Serial IO I2C Controller #0
pci@0000:00:15.1 generic Sunrise Point-LP Serial IO I2C Controller #1
pci@0000:00:16.0 communication Sunrise Point-LP CSME HECI #1
pci@0000:00:17.0 storage Sunrise Point-LP SATA Controller [AHCI mode]
pci@0000:00:1c.0 bridge Sunrise Point-LP PCI Express Root Port #1
pci@0000:01:00.0 generic RTS525A PCI Express Card Reader
pci@0000:00:1f.0 bridge Sunrise Point LPC Controller/eSPI Controller
pci@0000:00:1f.2 memory Memory controller
pci@0000:00:1f.3 multimedia Sunrise Point-LP HD Audio
pci@0000:00:1f.4 bus Sunrise Point-LP SMBus
pci@0000:00:1f.6 enp0s31f6 network Ethernet Connection (4) I219-LM
system PnP device PNP0c02
system PnP device PNP0b00
generic PnP device INT3f0d
input PnP device PNP0303
system PnP device PNP0c02
system PnP device PNP0c02
system PnP device PNP0c02
system PnP device PNP0c02
scsi2 storage
scsi@2:0.0.0 /dev/sda disk 256GB SK hynix SC311 S
scsi@2:0.0.0,1 /dev/sda1 volume 127MiB reserved partition
scsi@2:0.0.0,2 /dev/sda2 volume 99MiB Windows FAT volume
scsi@2:0.0.0,3 /dev/sda3 volume 15EiB Windows FAT volume
scsi@2:0.0.0,4 /dev/sda4 volume 94MiB EFI partition
scsi@2:0.0.0,5 /dev/sda5 volume 3906MiB EXT4 volume
scsi@2:0.0.0,6 /dev/sda6 volume 2940MiB Linux swap volume
scsi@2:0.0.0,7 /dev/sda7 volume 102GiB EXT4 volume
power DELL DJWGP9C
编辑
输出sudo lshw -c network：
sudo lshw -c network
*-network
description: Ethernet interface
product: Ethernet Connection (4) I219-LM
vendor: Intel Corporation
physical id: 1f.6
bus info: pci@0000:00:1f.6
logical name: enp0s31f6
version: 21
serial: a4:4c:c8:15:e7:87
size: 100Mbit/s
capacity: 1Gbit/s
width: 32 bits
clock: 33MHz
capabilities: pm msi bus_master cap_list ethernet physical tp 10bt 10bt-fd 100bt 100bt-fd 1000bt-fd autonegotiation
configuration: autonegotiation=on broadcast=yes driver=e1000e driverversion=5.13.0-37-generic duplex=full firmware=0.1-4 ip=192.168.1.14 latency=0 link=yes multicast=yes port=twisted pair speed=100Mbit/s
resources: irq:129 memory:ef100000-ef11ffff
和命令sudo lspci：
sudo lspci
00:00.0 Host bridge: Intel Corporation Xeon E3-1200 v6/7th Gen Core Processor Host Bridge/DRAM Registers (rev 02)
00:02.0 VGA compatible controller: Intel Corporation HD Graphics 620 (rev 02)
00:04.0 Signal processing controller: Intel Corporation Xeon E3-1200 v5/E3-1500 v5/6th Gen Core Processor Thermal Subsystem (rev 02)
00:14.0 USB controller: Intel Corporation Sunrise Point-LP USB 3.0 xHCI Controller (rev 21)
00:14.2 Signal processing controller: Intel Corporation Sunrise Point-LP Thermal subsystem (rev 21)
00:15.0 Signal processing controller: Intel Corporation Sunrise Point-LP Serial IO I2C Controller #0 (rev 21)
00:15.1 Signal processing controller: Intel Corporation Sunrise Point-LP Serial IO I2C Controller #1 (rev 21)
00:16.0 Communication controller: Intel Corporation Sunrise Point-LP CSME HECI #1 (rev 21)
00:17.0 SATA controller: Intel Corporation Sunrise Point-LP SATA Controller [AHCI mode] (rev 21)
00:1c.0 PCI bridge: Intel Corporation Sunrise Point-LP PCI Express Root Port #1 (rev f1)
00:1f.0 ISA bridge: Intel Corporation Sunrise Point LPC Controller/eSPI Controller (rev 21)
00:1f.2 Memory controller: Intel Corporation Sunrise Point-LP PMC (rev 21)
00:1f.3 Audio device: Intel Corporation Sunrise Point-LP HD Audio (rev 21)
00:1f.4 SMBus: Intel Corporation Sunrise Point-LP SMBus (rev 21)
00:1f.6 Ethernet controller: Intel Corporation Ethernet Connection (4) I219-LM (rev 21)
01:00.0 Unassigned class [ff00]: Realtek Semiconductor Co., Ltd. RTS525A PCI Express Card Reader (rev 01)
和：
sudo lsusb
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 004: ID 1fd2:6004 Melfas LGDisplay Incell Touch
Bus 001 Device 002: ID 1bcf:2b96 Sunplus Innovation Technology Inc. Integrated_Webcam_HD
Bus 001 Device 005: ID 0a5c:5833 Broadcom Corp. 5880
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
答案1
Ubuntu 20.04 通常可以在 Dell 5480 上正常运行（我现在正在使用一台）。这可能看起来太明显了，但是，从输出来看，wifi 没有显示是因为以太网已连接。拔下以太网并重试！