我可以访问互联网...
但我无法看到、选择或添加任何 wifi 连接
因为它显示我的网络图标下没有可用的网络设备
*-network
description: Wireless interface
product: BCM43228 802.11a/b/g/n
vendor: Broadcom Corporation
physical id: 0
bus info: pci@0000:02:00.0
logical name: wlan0
version: 00
serial: 28:e3:47:23:39:2e
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless
configuration: broadcast=yes driver=wl0 driverversion=6.30.223.248 (r487574) ip=192.168.0.106 latency=0 multicast=yes wireless=IEEE 802.11abg
resources: irq:19 memory:b3400000-b3403fff
00:00.0 Host bridge: Intel Corporation Haswell-ULT DRAM Controller (rev 0b)
00:02.0 VGA compatible controller: Intel Corporation Haswell-ULT Integrated Graphics Controller (rev 0b)
00:03.0 Audio device: Intel Corporation Haswell-ULT HD Audio Controller (rev 0b)
00:14.0 USB controller: Intel Corporation 8 Series USB xHCI HC (rev 04)
00:16.0 Communication controller: Intel Corporation 8 Series HECI #0 (rev 04)
00:1b.0 Audio device: Intel Corporation 8 Series HD Audio Controller (rev 04)
00:1c.0 PCI bridge: Intel Corporation 8 Series PCI Express Root Port 2 (rev e4)
00:1c.3 PCI bridge: Intel Corporation 8 Series PCI Express Root Port 4 (rev e4)
00:1c.4 PCI bridge: Intel Corporation 8 Series PCI Express Root Port 5 (rev e4)
00:1d.0 USB controller: Intel Corporation 8 Series USB EHCI #1 (rev 04)
00:1f.0 ISA bridge: Intel Corporation 8 Series LPC Controller (rev 04)
00:1f.2 SATA controller: Intel Corporation 8 Series SATA Controller 1 [AHCI mode] (rev 04)
00:1f.3 SMBus: Intel Corporation 8 Series SMBus Controller (rev 04)
01:00.0 Unassigned class [ff00]: Realtek Semiconductor Co., Ltd. RTS5229 PCI Express Card Reader (rev 01)
02:00.0 Network controller: Broadcom Corporation BCM43228 802.11a/b/g/n
03:00.0 3D controller: NVIDIA Corporation GM107M [GeForce GTX 850M] (rev a2)
# interfaces(5) file used by ifup(8) and ifdown(8)
auto lo
iface lo inet loopback
答案1
通过终端命令检查以下文件的内容：
sudo gedit /etc/network/interfaces
它应该是这样的：
auto lo
iface lo inet loopback
除非您正在运行一些与网络相关的其他服务，如热点或任何其他服务。