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RTL8822BE 802.11a/b/g/n/ac WiFi 适配器升级至 20.04 lts 后无法工作

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RTL8822BE 802.11a/b/g/n/ac WiFi 适配器升级至 20.04 lts 后无法工作

我有一台联想 E490 笔记本电脑，配有 Wi-Fi RTL8822BE 802.11a/b/g/n/ac Wi-Fi 适配器，但升级到 20.04 LTS 后，Wi-Fi 无法使用。有人遇到过这个问题吗？

  *-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: 10
       serial: 64:1c:67:ae:26:49
       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 firmware=rtl8168g-3_0.0.1 04/23/13 latency=0 link=no multicast=yes port=MII
       resources: irq:16 ioport:3000(size=256) memory:a1204000-a1204fff memory:a1200000-a1203fff
  *-generic
       description: Wireless interface
       product: RTL8822BE 802.11a/b/g/n/ac WiFi adapter
       vendor: Realtek Semiconductor Co., Ltd.
       physical id: 0
       bus info: pci@0000:05:00.0
       logical name: wlp5s0
       version: 00
       serial: 50:5b:c2:b4:5f:29
       width: 64 bits
       clock: 33MHz
       capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless
       configuration: broadcast=yes driver=rtw_pci driverversion=5.3.0-51-generic firmware=N/A ip=192.168.15.20 latency=0 link=yes multicast=yes wireless=IEEE 802.11
       resources: irq:131 ioport:2000(size=256) memory:a1100000-a110ffff

图标出现在上角，但我无法完成可用连接网络的扫描。

运行命令时nmcli device wifi list出现“没有设备或网络”。

运行时sudo iwlist wlp5s0 scan，结果为：

wlp5s0  No scan results

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