我在最近（大约 2 周前）安装 ubuntu 20.04 时遇到了互联网连接问题。当我启动计算机时，互联网连接正常，但过了一会儿，它会断开连接，并且经常难以重新获得连接。我尝试过 WiFi 和以太网，但两者都有类似的问题。可能是硬件问题，但我想先排除 ubuntu。这是输出sudo lshw -class network：
*-network
description: Ethernet interface
product: AR8161 Gigabit Ethernet
vendor: Qualcomm Atheros
physical id: 0
bus info: pci@0000:02:00.0
logical name: enp2s0
version: 08
serial: 78:e3:b5:b2:4c:68
size: 100Mbit/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=192.168.1.5 latency=0 link=yes multicast=yes port=twisted pair speed=100Mbit/s
resources: irq:19 memory:fe900000-fe93ffff ioport:d000(size=128)
*-network
description: Wireless interface
product: RT5390 Wireless 802.11n 1T/1R PCIe
vendor: Ralink corp.
physical id: 0
bus info: pci@0000:05:00.0
logical name: wlp5s0
version: 00
serial: 74:e5:43:e8:61:0a
width: 32 bits
clock: 33MHz
capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless
configuration: broadcast=yes driver=rt2800pci driverversion=5.4.0-42-generic firmware=0.40 ip=192.168.1.6 latency=0 link=yes multicast=yes wireless=IEEE 802.11
resources: irq:19 memory:fe800000-fe80ffff