我在联想 Y50-70 上运行 Ubuntu 18.04 LTS，与 Windows 8.1 一起采用双启动设置。每天有 3-4 次，Wifi 会突然断开连接，然后在一两分钟内自动重新连接。有时，它会找不到任何可用的连接，然后我必须关闭 Wifi 2-3 分钟，然后它才会重新连接。我至少在过去 4 个月里一直面临这些问题。在此之前，我只使用 Windows，这样的事情每月只会发生一两次。
以下是 的输出sudo lshw -class network：
*-network
description: Wireless interface
product: QCA9565 / AR9565 Wireless Network Adapter
vendor: Qualcomm Atheros
physical id: 0
bus info: pci@0000:08:00.0
logical name: wlp8s0
version: 01
serial: 30:10:b3:a2:42:d7
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress bus_master cap_list rom ethernet physical wireless
configuration: broadcast=yes driver=ath9k driverversion=4.15.0-147-generic firmware=N/A ip=192.168.0.100 latency=0 link=yes multicast=yes wireless=IEEE 802.11
resources: irq:17 memory:d1600000-d167ffff memory:d1680000-d168ffff
*-network
description: Ethernet interface
product: RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller
vendor: Realtek Semiconductor Co., Ltd.
physical id: 0
bus info: pci@0000:09:00.0
logical name: enp9s0
version: 10
serial: f0:76:1c:0b:b0:19
size: 10Mbit/s
capacity: 1Gbit/s
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress msix vpd bus_master cap_list ethernet physical tp mii 10bt 10bt-fd 100bt 100bt-fd 1000bt 1000bt-fd autonegotiation
configuration: autonegotiation=on broadcast=yes driver=r8169 driverversion=2.3LK-NAPI duplex=half firmware=rtl8168g-3_0.0.1 04/23/13 latency=0 link=no multicast=yes port=MII speed=10Mbit/s
resources: irq:18 ioport:3000(size=256) memory:d1504000-d1504fff memory:d1500000-d1503fff
编辑：输出iwlist freq：
lo no frequency information.
enp9s0 no frequency information.
wlp8s0 13 channels in total; available frequencies :
Channel 01 : 2.412 GHz
Channel 02 : 2.417 GHz
Channel 03 : 2.422 GHz
Channel 04 : 2.427 GHz
Channel 05 : 2.432 GHz
Channel 06 : 2.437 GHz
Channel 07 : 2.442 GHz
Channel 08 : 2.447 GHz
Channel 09 : 2.452 GHz
Channel 10 : 2.457 GHz
Channel 11 : 2.462 GHz
Channel 12 : 2.467 GHz
Channel 13 : 2.472 GHz
Current Frequency:2.462 GHz (Channel 11)
输出sudo iwlist scan：
lo Interface doesn't support scanning.
enp9s0 Interface doesn't support scanning.
wlp8s0 Scan completed :
Cell 01 - Address: 98:DA:C4:3B:F4:6E
Channel:11
Frequency:2.462 GHz (Channel 11)
Quality=36/70 Signal level=-74 dBm
Encryption key:on
ESSID:"MY-WIFINAME"
Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 11 Mb/s; 9 Mb/s
18 Mb/s; 36 Mb/s; 54 Mb/s
Bit Rates:6 Mb/s; 12 Mb/s; 24 Mb/s; 48 Mb/s
Mode:Master
Extra:tsf=00000045b351da7e
Extra: Last beacon: 216ms ago
IE: Unknown: 000667617574616D
IE: Unknown: 010882848B961224486C
IE: Unknown: 03010B
IE: Unknown: 2A0104
IE: Unknown: 32040C183060
IE: Unknown: 2D1A6E1017FFFF000001000000000000000000000000000000000000
IE: Unknown: 3D160B070600000000000000000000000000000000000000
IE: IEEE 802.11i/WPA2 Version 1
Group Cipher : CCMP
Pairwise Ciphers (1) : CCMP
Authentication Suites (1) : PSK
IE: Unknown: 7F09000000000000000000
IE: Unknown: 0B05040000127A
IE: Unknown: DD180050F2020101000003A4000027A4000042435E0062322F00
IE: Unknown: 4A0E14000A002C01C800140005001900
IE: Unknown: DD8D0050F204104A0001101044000102103B0001031047001038833092309218839C7798DAC43BF4C41021000754502D4C696E6B10230009544C2D57523834304E10240003362E3010420003312E301054000800060050F20400011011001B576972656C657373204E20526F7574657220544C2D57523834304E10080002210C103C0001011049000600372A000120
IE: Unknown: DD07000C4300000000
路由器页面图片：
答案1
来自评论...
现有的路由器信号较弱，并且距离地板 2 英尺。
更改路由器的位置后，它运行良好。
进一步的问题可能需要更换旧路由器。