Kubuntu 22.10下Wi-Fi及以太网连接无上下行速率问题求助

大家好，我已经用Kubuntu 22.10两周了，之前一切正常，但从前天开始，不管是Wi-Fi还是以太网连接，都完全没有下载或上传速率。我已经排除了硬件和路由器的问题——因为同一台设备上双启的Ubuntu系统网络完全正常。

我逛了不少论坛找解决方案，但试了都没用；也试过关闭防火墙，还是没效果。现在的情况是能连接到路由器管理页面，但打不开任何其他网页。

下面是我收集的一些网络相关命令输出，都是在Wi-Fi连接状态下获取的，希望能帮到大家排查问题：

lshw -c Network 输出： #

*-network

description: Wireless interface

product: RTL8821CE 802.11ac PCIe Wireless Network Adapter

vendor: Realtek Semiconductor Co., Ltd.

physical id: 0

bus info: pci@0000:02:00.0

logical name: wlp2s0

version: 00

serial: 28:39:26:25:64:ef

width: 64 bits

clock: 33MHz

capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless

configuration: broadcast=yes driver=rtw_8821ce driverversion=5.19.0-28-generic firmware=N/A ip=192.168.1.102 latency=0 link=yes multicast=yes wireless=IEEE 802.11

resources: irq:141 ioport:4000(size=256) memory:a4300000-a430ffff

*-network

description: Ethernet interface

product: RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller

vendor: Realtek Semiconductor Co., Ltd.

physical id: 0

bus info: pci@0000:03:00.0

logical name: enp3s0

version: 10

serial: e8:6a:64:e1:db:e1

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-fd autonegotiation

configuration: autonegotiation=on broadcast=yes driver=r8169 driverversion=5.19.0-28-generic firmware=rtl8168g-3_0.0.1 04/23/13 latency=0 link=no multicast=yes port=twisted pair

resources: irq:17 ioport:3000(size=256) memory:a4204000-a4204fff memory:a4200000-a4203fff

iwconfig 输出： #

lo        no wireless extensions.

enp3s0    no wireless extensions.

wlp2s0    IEEE 802.11  ESSID:"Shitdroid"

Mode:Managed  Frequency:2.462 GHz  Access Point: 58:D9:D5:53:A8:D8

Bit Rate=39 Mb/s   Tx-Power=20 dBm

Retry short limit:7   RTS thr:off   Fragment thr:off

Encryption key:off

Power Management:off

Link Quality=70/70  Signal level=-24 dBm

Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0

Tx excessive retries:0  Invalid misc:7   Missed beacon:0

lxcbr0    no wireless extensions.

ifconfig 输出： #

enp3s0: flags=4099<UP,BROADCAST,MULTICAST>  mtu 1500

ether e8:6a:64:e1:db:e1  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

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 51208  bytes 4477590 (4.4 MB)

RX errors 0  dropped 0  overruns 0  frame 0

TX packets 51208  bytes 4477590 (4.4 MB)

TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

lxcbr0: flags=4099<UP,BROADCAST,MULTICAST>  mtu 1500

inet 10.0.3.1  netmask 255.255.255.0  broadcast 10.0.3.255

ether 00:16:3e:00:00:00  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

wlp2s0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500

inet 192.168.0.100  netmask 255.255.255.0  broadcast 192.168.0.255

inet6 fe80::2a39:26ff:fe25:64ef  prefixlen 64  scopeid 0x20<link>

ether 28:39:26:25:64:ef  txqueuelen 1000  (Ethernet)

RX packets 27  bytes 3374 (3.3 KB)

RX errors 0  dropped 0  overruns 0  frame 0

TX packets 61  bytes 13406 (13.4 KB)

TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

route 输出： #

Kernel IP routing table

Destination     Gateway         Genmask         Flags Metric Ref    Use Iface

default         192.168.0.1     0.0.0.0         UG    600    0        0 wlp2s0

10.0.3.0        0.0.0.0         255.255.255.0   U     0      0        0 lxcbr0

link-local      0.0.0.0         255.255.0.0     U     1000   0        0 lxcbr0

192.168.0.0     0.0.0.0         255.255.255.0   U     600    0        0 wlp2s0

另外，我用lsmod检查过驱动，rtw88_8821ce确实在列表里。

我知道可能是个新手问题，但真的非常感谢大家能帮我排查解决！

备注：内容来源于stack exchange，提问作者Wasif Hamid