Wifi 适配器已连接，但互联网不稳定。有时它真的很好，但几秒钟后，它就会停止或变得非常慢。然后一分钟后，它恢复正常。我尝试了两种不同的 wifi 路由器，但当我使用手机作为路由器时，这种情况不会发生。我使用的是内核为 4.15.0-108-generic 的 Ubuntu 18.04.4。iwconfig 上显示了异常数量的过度重试和无效杂项。
配置：
wlx20e6170547f3 IEEE 802.11 ESSID:"IV2"
Mode:Managed Frequency:2.462 GHz Access Point: 00:1A:3F:8C:EF:DC
Bit Rate=54 Mb/s Tx-Power=20 dBm
Retry short limit:7 RTS thr:off Fragment thr:off
Power Management:off
Link Quality=69/70 Signal level=-41 dBm
Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
Tx excessive retries:2162 Invalid misc:15348 Missed beacon:0
ifconfigf：
wlx20e6170547f3: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 10.0.0.117 netmask 255.255.255.0 broadcast 10.0.0.255
inet6 fe80::e14f:6814:691f:ae65 prefixlen 64 scopeid 0x20<link>
ether 20:e6:17:05:47:f3 txqueuelen 1000 (Ethernet)
RX packets 1597397 bytes 1916774385 (1.9 GB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 953376 bytes 114675969 (114.6 MB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
sudo lshw -C 网络：
*-network
description: Wireless interface
physical id: 3
bus info: usb@1:1.2
logic name: wlx20e6170547f3
serial: 20:e6:17:05:47:f3
capacity: ethernet physical wireless
configuration: broadcast=yes driver=mt7601u driverversion=4.15.0-108-generic firmware=N/A ip=10.0.0.117 link=yes multicast=yes wireless=IEEE 802.11