Ubuntu 20.04下Realtek RTL8821CU无线网卡失效求助

各位大佬好，我的Realtek无线网卡突然罢工了！之前是跟着社区里的帖子成功装上驱动的，但最近Ubuntu 20.04更新后就彻底用不了了，有没有懂行的朋友能帮我排查下问题？多谢多谢！

下面是我收集到的系统信息和命令输出：

DKMS状态 #

nvidia/515.86.01, 5.15.0-60-generic, x86_64: installed
nvidia/515.86.01, 5.19.0-32-generic, x86_64: installed
rtl8821CU/5.4.1: added

网络设备详情（sudo lshw -C network输出） #

*-network
description: Ethernet interface
product: RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller
vendor: Realtek Semiconductor Co., Ltd.
physical id: 0
bus info: pci@0000:04:00.0
logical name: enp4s0
version: 0c
serial: b4:2e:99:42:5d:92
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=5.19.0-32-generic firmware=rtl8168g-2_0.0.1 02/06/13 latency=0 link=no multicast=yes port=twisted pair
resources: irq:34 ioport:f000(size=256) memory:f7500000-f7500fff memory:f2200000-f2203fff
*-network
description: Ethernet interface
physical id: 5
bus info: usb@1:4
logical name: enxb6337242e0ec
serial: b6:33:72:42:e0:ec
capabilities: ethernet physical
configuration: autonegotiation=off broadcast=yes driver=rndis_host driverversion=5.19.0-32-generic duplex=half firmware=RNDIS device ip=192.168.198.105 link=yes multicast=yes port=twisted pair

USB设备列表（lsusb输出） #

Bus 006 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 005 Device 002: ID 258a:0016 BY Tech Usb Gaming Keyboard
Bus 005 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 004 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 015: ID 0bda:c811 Realtek Semiconductor Corp. 802.11ac NIC
Bus 001 Device 019: ID 22b8:2e24 Motorola PCS moto g(60)s
Bus 001 Device 003: ID 145f:02a7 Trust GXT 950 Gaming Mouse
Bus 001 Device 007: ID 0a5c:2148 Broadcom Corp. BCM92046DG-CL1ROM Bluetooth 2.1 Adapter
Bus 001 Device 006: ID 0a5c:4503 Broadcom Corp. Mouse (Boot Interface Subclass)
Bus 001 Device 004: ID 0a5c:4502 Broadcom Corp. Keyboard (Boot Interface Subclass)
Bus 001 Device 002: ID 0a5c:4500 Broadcom Corp. BCM2046B1 USB 2.0 Hub (part of BCM2046 Bluetooth)
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

额外尝试 #

我还按照之前帖子评论里的建议，执行了命令 grep rtw /etc/modprobe.d/*，但没有得到任何输出结果。

备注：内容来源于stack exchange，提问作者spider