我已经在我的笔记本电脑（MSI GP62MVR）上安装了 ubuntu，但我无法通过 wifi 连接，我可以通过局域网连接，但当我没有以太网电缆时，这会产生问题。
我的问题很简单，我该如何解决这个问题并连接到 Wi-Fi。
一些有用的信息：
$ uname -a
Linux Xodad3 4.4.0-104-generic #127-Ubuntu SMP Mon Dec 11 12:16:42 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux
$ ifconfig -a
br-5b8bfe8f3280 Link encap:Ethernet HWaddr 02:42:73:7e:da:13
inet addr:172.20.0.1 Bcast:172.20.255.255 Mask:255.255.0.0
UP BROADCAST MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)
br-94d77fda732c Link encap:Ethernet HWaddr 02:42:a6:56:35:fd
inet addr:172.21.0.1 Bcast:172.21.255.255 Mask:255.255.0.0
inet6 addr: fe80::42:a6ff:fe56:35fd/64 Scope:Link
UP BROADCAST MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:2 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:0 (0.0 B) TX bytes:168 (168.0 B)
br-c76e1f5c25d6 Link encap:Ethernet HWaddr 02:42:11:b1:64:30
inet addr:172.22.0.1 Bcast:172.22.255.255 Mask:255.255.0.0
inet6 addr: fe80::42:11ff:feb1:6430/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:1260 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:0 (0.0 B) TX bytes:264982 (264.9 KB)
br-cc457eb3c43f Link encap:Ethernet HWaddr 02:42:06:75:93:78
inet addr:172.18.0.1 Bcast:172.18.255.255 Mask:255.255.0.0
UP BROADCAST MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)
br-de30f515277c Link encap:Ethernet HWaddr 02:42:ad:1b:63:03
inet addr:172.23.0.1 Bcast:172.23.255.255 Mask:255.255.0.0
inet6 addr: fe80::42:adff:fe1b:6303/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:1208 errors:0 dropped:0 overruns:0 frame:0
TX packets:2568 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:701568 (701.5 KB) TX bytes:574510 (574.5 KB)
br-f412d79509fc Link encap:Ethernet HWaddr 02:42:0c:c4:82:9c
inet addr:172.19.0.1 Bcast:172.19.255.255 Mask:255.255.0.0
UP BROADCAST MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)
docker0 Link encap:Ethernet HWaddr 02:42:cd:62:fc:f4
inet addr:172.17.0.1 Bcast:172.17.255.255 Mask:255.255.0.0
UP BROADCAST MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)
enp3s0 Link encap:Ethernet HWaddr 4c:cc:6a:81:49:8e
inet addr:192.168.121.135 Bcast:192.168.121.255 Mask:255.255.255.0
inet6 addr: fe80::4ecc:6aff:fe81:498e/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:2677690 errors:0 dropped:5333 overruns:0 frame:0
TX packets:949363 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:1645974202 (1.6 GB) TX bytes:103317215 (103.3 MB)
Interrupt:19
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:65536 Metric:1
RX packets:31670 errors:0 dropped:0 overruns:0 frame:0
TX packets:31670 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1
RX bytes:269116757 (269.1 MB) TX bytes:269116757 (269.1 MB)
veth121b824 Link encap:Ethernet HWaddr 52:4a:a8:ff:34:27
inet6 addr: fe80::504a:a8ff:feff:3427/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:2119 errors:0 dropped:0 overruns:0 frame:0
TX packets:3593 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:746420 (746.4 KB) TX bytes:989588 (989.5 KB)
veth1a940ba Link encap:Ethernet HWaddr 22:b4:1a:8a:f9:4f
inet6 addr: fe80::20b4:1aff:fe8a:f94f/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:1444 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:0 (0.0 B) TX bytes:284694 (284.6 KB)
veth55102e9 Link encap:Ethernet HWaddr aa:95:02:52:fc:4b
inet6 addr: fe80::a895:2ff:fe52:fc4b/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:1441 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:0 (0.0 B) TX bytes:284436 (284.4 KB)
veth5afa8a0 Link encap:Ethernet HWaddr 02:21:d9:76:04:80
inet6 addr: fe80::21:d9ff:fe76:480/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:4486 errors:0 dropped:0 overruns:0 frame:0
TX packets:6439 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:3584839 (3.5 MB) TX bytes:960057 (960.0 KB)
vethac2eafc Link encap:Ethernet HWaddr ba:6d:88:a0:f3:ac
inet6 addr: fe80::b86d:88ff:fea0:f3ac/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:5648 errors:0 dropped:0 overruns:0 frame:0
TX packets:6711 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:1082246 (1.0 MB) TX bytes:3846044 (3.8 MB)
vethc96bb38 Link encap:Ethernet HWaddr 7e:5c:2e:5f:a6:19
inet6 addr: fe80::7c5c:2eff:fe5f:a619/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:191 errors:0 dropped:0 overruns:0 frame:0
TX packets:1668 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:20432 (20.4 KB) TX bytes:374340 (374.3 KB)
wlp2s0 Link encap:Ethernet HWaddr 84:ef:18:f0:84:2b
inet addr:192.168.121.35 Bcast:192.168.121.255 Mask:255.255.255.0
inet6 addr: fe80::e415:4e6e:ebe2:c284/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:339803 errors:0 dropped:0 overruns:0 frame:0
TX packets:1165 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:53340660 (53.3 MB) TX bytes:200097 (200.0 KB)
$ sudo lshw-类网络
*-network
description: Wireless interface
product: Wireless 3165
vendor: Intel Corporation
physical id: 0
bus info: pci@0000:02:00.0
logical name: wlp2s0
version: 81
serial: 84:ef:18:f0:84:2b
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless
configuration: broadcast=yes driver=iwlwifi driverversion=4.4.0-104-generic firmware=17.352738.0 ip=192.168.121.35 latency=0 link=yes multicast=yes wireless=IEEE 802.11abgn
resources: irq:140 memory:df300000-df301fff
*-network
description: Ethernet interface
product: Killer E2400 Gigabit Ethernet Controller
vendor: Qualcomm Atheros
physical id: 0
bus info: pci@0000:03:00.0
logical name: enp3s0
version: 10
serial: 4c:cc:6a:81:49:8e
size: 1Gbit/s
capacity: 1Gbit/s
width: 64 bits
clock: 33MHz
capabilities: pm pciexpress msi msix bus_master cap_list ethernet physical tp 10bt 10bt-fd 100bt 100bt-fd 1000bt-fd autonegotiation
configuration: autonegotiation=on broadcast=yes driver=alx duplex=full ip=192.168.121.135 latency=0 link=yes multicast=yes port=twisted pair speed=1Gbit/s
resources: irq:141 memory:df200000-df23ffff ioport:d000(size=128)
*-network:0
description: Ethernet interface
physical id: 2
logical name: vethc96bb38
serial: 7e:5c:2e:5f:a6:19
size: 10Gbit/s
capabilities: ethernet physical
configuration: autonegotiation=off broadcast=yes driver=veth driverversion=1.0 duplex=full link=yes multicast=yes port=twisted pair speed=10Gbit/s
*-network:1
description: Ethernet interface
physical id: 3
logical name: veth5afa8a0
serial: 02:21:d9:76:04:80
size: 10Gbit/s
capabilities: ethernet physical
configuration: autonegotiation=off broadcast=yes driver=veth driverversion=1.0 duplex=full link=yes multicast=yes port=twisted pair speed=10Gbit/s
*-network:2
description: Ethernet interface
physical id: 4
logical name: veth1a940ba
serial: 22:b4:1a:8a:f9:4f
size: 10Gbit/s
capabilities: ethernet physical
configuration: autonegotiation=off broadcast=yes driver=veth driverversion=1.0 duplex=full link=yes multicast=yes port=twisted pair speed=10Gbit/s
*-network:3
description: Ethernet interface
physical id: 5
logical name: veth55102e9
serial: aa:95:02:52:fc:4b
size: 10Gbit/s
capabilities: ethernet physical
configuration: autonegotiation=off broadcast=yes driver=veth driverversion=1.0 duplex=full link=yes multicast=yes port=twisted pair speed=10Gbit/s
*-network:4
description: Ethernet interface
physical id: 6
logical name: veth121b824
serial: 52:4a:a8:ff:34:27
size: 10Gbit/s
capabilities: ethernet physical
configuration: autonegotiation=off broadcast=yes driver=veth driverversion=1.0 duplex=full link=yes multicast=yes port=twisted pair speed=10Gbit/s
*-network:5
description: Ethernet interface
physical id: 7
logical name: vethac2eafc
serial: ba:6d:88:a0:f3:ac
size: 10Gbit/s
capabilities: ethernet physical
configuration: autonegotiation=off broadcast=yes driver=veth driverversion=1.0 duplex=full link=yes multicast=yes port=twisted pair speed=10Gbit/s
$ lspci
00:00.0 Host bridge: Intel Corporation Sky Lake Host Bridge/DRAM Registers (rev 07)
00:01.0 PCI bridge: Intel Corporation Sky Lake PCIe Controller (x16) (rev 07)
00:02.0 VGA compatible controller: Intel Corporation Skylake Integrated Graphics (rev 06)
00:14.0 USB controller: Intel Corporation Sunrise Point-H USB 3.0 xHCI Controller (rev 31)
00:14.2 Signal processing controller: Intel Corporation Sunrise Point-H Thermal subsystem (rev 31)
00:16.0 Communication controller: Intel Corporation Sunrise Point-H CSME HECI #1 (rev 31)
00:17.0 SATA controller: Intel Corporation Sunrise Point-H SATA Controller [AHCI mode] (rev 31)
00:1c.0 PCI bridge: Intel Corporation Sunrise Point-H PCI Express Root Port #1 (rev f1)
00:1c.3 PCI bridge: Intel Corporation Sunrise Point-H PCI Express Root Port #4 (rev f1)
00:1c.4 PCI bridge: Intel Corporation Sunrise Point-H PCI Express Root Port #5 (rev f1)
00:1f.0 ISA bridge: Intel Corporation Sunrise Point-H LPC Controller (rev 31)
00:1f.2 Memory controller: Intel Corporation Sunrise Point-H PMC (rev 31)
00:1f.3 Audio device: Intel Corporation Sunrise Point-H HD Audio (rev 31)
00:1f.4 SMBus: Intel Corporation Sunrise Point-H SMBus (rev 31)
01:00.0 VGA compatible controller: NVIDIA Corporation Device 1c20 (rev a1)
01:00.1 Audio device: NVIDIA Corporation Device 10f1 (rev a1)
02:00.0 Network controller: Intel Corporation Wireless 3165 (rev 81)
03:00.0 Ethernet controller: Qualcomm Atheros Killer E2400 Gigabit Ethernet Controller (rev 10)
04:00.0 USB controller: ASMedia Technology Inc. ASM1142 USB 3.1 Host Controller
如果需要更多信息，请告诉我。我会尽快提供