最近备份了 16.04 LTS 安装中的主文件夹，清除了磁盘并重新安装了 20.04 LTS，然后从备份中恢复了主文件夹。从那时起，wifi 可以连接，但速度很慢，并且经常丢失身份验证。
我尝试重新加载无线内核模块，改变wifi 省电设置， 和停用驾驶员的 N 模式，沒有結果。
我想我可能需要重新编译 wifi 驱动程序或调整内核版本，但我不确定该怎么做，如果没有必要，我宁愿不碰内核。有人能提供任何见解，看看哪一个可能是问题所在吗？
sudo lshw -C 网络：
*-network
description: Ethernet interface
product: 88E8056 PCI-E Gigabit Ethernet Controller
vendor: Marvell Technology Group Ltd.
physical id: 0
bus info: pci@0000:02:00.0
logical name: enp2s0
version: 12
serial: 00:1d:60:57:d3:e3
capacity: 1Gbit/s
width: 64 bits
clock: 33MHz
capabilities: pm vpd msi pciexpress bus_master cap_list rom ethernet physical tp 10bt 10bt-fd 100bt 100bt-fd 1000bt 1000bt-fd autonegotiation
configuration: autonegotiation=on broadcast=yes driver=sky2 driverversion=1.30 latency=0 link=no multicast=yes port=twisted pair
resources: irq:28 memory:fe9fc000-fe9fffff ioport:d800(size=256) memory:fe9c0000-fe9dffff
*-network
description: Wireless interface
product: RT2561/RT61 802.11g PCI
vendor: Ralink corp.
physical id: 1
bus info: pci@0000:05:01.0
logical name: wlp5s1
version: 00
serial: 00:18:f8:b0:fd:53
width: 32 bits
clock: 33MHz
capabilities: pm bus_master cap_list ethernet physical wireless
configuration: broadcast=yes driver=rt61pci driverversion=5.11.0-37-generic firmware=0.8 ip=192.168.0.112 latency=64 link=yes multicast=yes wireless=IEEE 802.11
resources: irq:17 memory:febf8000-febfffff
*-network
description: Wireless interface
physical id: 1
bus info: usb@1:3
logical name: wlx0015af2398bc
serial: 00:15:af:23:98:bc
capabilities: ethernet physical wireless
configuration: broadcast=yes driver=rtl8187 driverversion=5.11.0-37-generic firmware=N/A link=no multicast=yes wireless=IEEE 802.11
ifconfig-a：
enp2s0: flags=4099<UP,BROADCAST,MULTICAST> mtu 1500
ether 00:1d:60:57:d3:e3 txqueuelen 1000 (Ethernet)
RX packets 0 bytes 0 (0.0 B)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 0 bytes 0 (0.0 B)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
device interrupt 17
lo: flags=73<UP,LOOPBACK,RUNNING> mtu 65536
inet 127.0.0.1 netmask 255.0.0.0
inet6 ::1 prefixlen 128 scopeid 0x10<host>
loop txqueuelen 1000 (Local Loopback)
RX packets 8827 bytes 790555 (790.5 KB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 8827 bytes 790555 (790.5 KB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
wlp5s1: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 192.168.0.112 netmask 255.255.255.0 broadcast 192.168.0.255
inet6 fe80::3b66:3466:167d:f349 prefixlen 64 scopeid 0x20<link>
ether 00:18:f8:b0:fd:53 txqueuelen 1000 (Ethernet)
RX packets 25701 bytes 20660841 (20.6 MB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 23721 bytes 6775707 (6.7 MB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
wlx0015af2398bc: flags=4099<UP,BROADCAST,MULTICAST> mtu 1500
ether 00:15:af:23:98:bc txqueuelen 1000 (Ethernet)
RX packets 0 bytes 0 (0.0 B)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 0 bytes 0 (0.0 B)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
sudo iwconfig：
lo no wireless extensions.
enp2s0 no wireless extensions.
wlx0015af2398bc IEEE 802.11 ESSID:off/any
Mode:Managed Access Point: Not-Associated Tx-Power=20 dBm
Retry short limit:7 RTS thr:off Fragment thr:off
Encryption key:off
Power Management:off
wlp5s1 IEEE 802.11 ESSID:"00placeholder00"
Mode:Managed Frequency:2.412 GHz Access Point: 94:10:3E:A8:9C:4E
Bit Rate=1 Mb/s Tx-Power=20 dBm
Retry short limit:7 RTS thr:off Fragment thr:off
Encryption key:off
Power Management:on
Link Quality=64/70 Signal level=-46 dBm
Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
Tx excessive retries:199 Invalid misc:3999 Missed beacon:0
lspci：
05:01.0 Network controller: Ralink corp. RT2561/RT61 802.11g PCI
dmesg：
[ 2348.175565] wlp5s1: authenticate with a2:2b:b0:ea:23:7a
[ 2348.190043] wlp5s1: send auth to a2:2b:b0:ea:23:7a (try 1/3)
[ 2348.392544] wlp5s1: send auth to a2:2b:b0:ea:23:7a (try 2/3)
[ 2348.596457] wlp5s1: send auth to a2:2b:b0:ea:23:7a (try 3/3)
[ 2348.800346] wlp5s1: authentication with a2:2b:b0:ea:23:7a timed out