我正在试用 Kubuntu 22.10 几个星期。之前它运行良好，但从前天开始，我建立的任何网络连接都没有下载或上传速度。我已经排除了任何硬件或路由器问题，因为同一设备中的 Ubuntu 系统运行完全正常。（我有双启动设置）。我尝试浏览论坛，但没有找到任何对我有用的方法。我尝试禁用防火墙，但也没有用。它可以连接到路由器管理员页面，但无法连接到任何其他页面。
我不知道这是否有帮助，但这是lshw -c Network
*-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
这是输出iwconfig
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.
这是输出 ifconfig
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
这是输出route
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
所有输出都是在连接到 wifi 时获取的。我已检查了驱动程序lsmod，驱动程序rtw88_8821ce出现在列表中。如果这是一个新手问题，我很抱歉，但任何帮助都将不胜感激。