Lubuntu 22.04.3 LTS 无线网卡无法识别及网络工具故障求助

我刚安装了Lubuntu 22.04.3 LTS（Jammy Jellyfish），目前只能通过有线网络上网，遇到了一系列网络相关的问题，想请教大家该怎么解决：

• 我找过wifi-radar工具，但似乎Lubuntu并没有这个软件
• 安装了wifi-qr后无法正常运行，报错信息如下：

  ERROR: zbar processor in _zbar_video_open():
  system error: opening video device '/dev/video0': No such file or directory (2)
  

  （我完全没打算打开视频啊，这报错实在莫名其妙）
• 尝试使用network-manager，输入nm-applet后没有任何反应；加上sudo执行sudo nm-applet会弹出以下错误，之后还是没有任何功能：

  (nm-applet:45014): Gdk-CRITICAL **: 17:11:07.459: gdk_window_thaw_toplevel_updates: assertion 'window->update_and_descendants_freeze_count > 0' failed
  

• 安装了gnome-system-tools，但不管是否加sudo，输入gnome-system-tools都提示“command not found”

另外，我检查了网络设备情况：

• 执行ls /sys/class/net只找到了eth0和lo，但这台电脑在安装这个系统前是具备无线功能的
• 通过lspci查到的硬件信息里，确实存在无线网卡：

  00:00.0 Host bridge: Advanced Micro Devices, Inc. [AMD/ATI] RS480/RS482/RS485 Host Bridge (rev 10)
  00:01.0 PCI bridge: Advanced Micro Devices, Inc. [AMD/ATI] RC4xx/RS4xx PCI Bridge [int gfx]
  00:05.0 PCI bridge: Advanced Micro Devices, Inc. [AMD/ATI] RC4xx/RS4xx PCI Express Port 2
  00:06.0 PCI bridge: Advanced Micro Devices, Inc. [AMD/ATI] RC4xx/RS4xx PCI Express Port 3
  00:12.0 SATA controller: Advanced Micro Devices, Inc. [AMD/ATI] SB600 Non-Raid-5 SATA
  00:13.0 USB controller: Advanced Micro Devices, Inc. [AMD/ATI] SB600 USB (OHCI0)
  00:13.1 USB controller: Advanced Micro Devices, Inc. [AMD/ATI] SB600 USB (OHCI1)
  00:13.2 USB controller: Advanced Micro Devices, Inc. [AMD/ATI] SB600 USB (OHCI2)
  00:13.3 USB controller: Advanced Micro Devices, Inc. [AMD/ATI] SB600 USB (OHCI3)
  00:13.4 USB controller: Advanced Micro Devices, Inc. [AMD/ATI] SB600 USB (OHCI4)
  00:13.5 USB controller: Advanced Micro Devices, Inc. [AMD/ATI] SB600 USB Controller (EHCI)
  00:14.0 SMBus: Advanced Micro Devices, Inc. [AMD/ATI] SBx00 SMBus Controller (rev 14)
  00:14.1 IDE interface: Advanced Micro Devices, Inc. [AMD/ATI] SB600 IDE
  00:14.2 Audio device: Advanced Micro Devices, Inc. [AMD/ATI] SBx00 Azalia (Intel HDA)
  00:14.3 ISA bridge: Advanced Micro Devices, Inc. [AMD/ATI] SB600 PCI to LPC Bridge
  00:14.4 PCI bridge: Advanced Micro Devices, Inc. [AMD/ATI] SBx00 PCI to PCI Bridge
  00:18.0 Host bridge: Advanced Micro Devices, Inc. [AMD] K8 [Athlon64/Opteron] HyperTransport Technology Configuration
  00:18.1 Host bridge: Advanced Micro Devices, Inc. [AMD] K8 [Athlon64/Opteron] Address Map
  00:18.2 Host bridge: Advanced Micro Devices, Inc. [AMD] K8 [Athlon64/Opteron] DRAM Controller
  00:18.3 Host bridge: Advanced Micro Devices, Inc. [AMD] K8 [Athlon64/Opteron] Miscellaneous Control
  01:05.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] RS482/RS485 [Radeon Xpress 1100/1150]
  05:00.0 Network controller: Broadcom Inc. and subsidiaries BCM4311 802.11b/g WLAN (rev 01)
  08:00.0 Ethernet controller: Broadcom Inc. and subsidiaries BCM4401-B0 100Base-TX (rev 02)
  08:01.0 SD Host controller: Ricoh Co Ltd R5C822 SD/SDIO/MMC/MS/MSPro Host Adapter (rev 22)
  08:01.1 System peripheral: Ricoh Co Ltd R5C843 MMC Host Controller (rev 12)
  

请问各位，我现在应该怎么操作才能解决无线网卡识别和网络工具的问题呢？

备注：内容来源于stack exchange，提问作者Alain Reve