我最近在笔记本电脑上安装了 Ubuntu 20.04 LTS。除了不时出现几次冻结之外，一切看起来都很好。它们是由于许多 acpi 错误造成的，所以我将 grub 配置文件更改为 acpi=off。在此之后wifi停止工作，我的意思是它无法找到任何无线网络。
我尝试了我知道的旧解决方案，即 type sudo modprobe rtl8723be ant_sel=1，但它不起作用。
通过互联网查看，我发现了几篇指向驱动程序的帖子，其中包含安装和运行它们的所有说明。我尝试了所有这些都没有运气。
以下是一些规格（希望是相关的）：
$ sudo lshw -c network
*-network
description: Wireless interface
product: RTL8723BE PCIe Wireless Network Adapter
vendor: Realtek Semiconductor Co., Ltd.
physical id: 0
bus info: pci@0000:03:00.0
logical name: wlo1
version: 00
serial: 54:8c:a0:c0:4a:57
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless
configuration: broadcast=yes driver=rtl8723be driverversion=5.4.0-47-generic firmware=N/A latency=0 link=no multicast=yes wireless=IEEE 802.11
resources: irq:11 ioport:3000(size=256) memory:b1400000-b1403fff
$ lspci -knn | grep -A 2 -i net
03:00.0 Network controller [0280]: Realtek Semiconductor Co., Ltd. RTL8723BE PCIe Wireless Network Adapter [10ec:b723]
DeviceName: WLAN Realtek RTL8723BE b/g/n 1x1 + BT 4 LE PCIe+USB M.2 WW
Subsystem: Hewlett-Packard Company RTL8723BE PCIe Wireless Network Adapter [103c:81c1]
Kernel driver in use: rtl8723be
Kernel modules: rtl8723be, wl
$ sudo modprobe rtl8723be && dmesg | grep -i rtl
[ 0.490322] r8169 0000:02:00.0 eth0: RTL8106e, ec:8e:b5:31:2a:c0, XID 449, IRQ 21
[ 3.249380] Bluetooth: hci0: RTL: examining hci_ver=06 hci_rev=000b lmp_ver=06 lmp_subver=8723
[ 3.250236] Bluetooth: hci0: RTL: rom_version status=0 version=1
[ 3.250237] Bluetooth: hci0: RTL: loading rtl_bt/rtl8723b_fw.bin
[ 3.259315] Bluetooth: hci0: RTL: loading rtl_bt/rtl8723b_config.bin
[ 3.259336] bluetooth hci0: Direct firmware load for rtl_bt/rtl8723b_config.bin failed with error -2
[ 3.259341] Bluetooth: hci0: RTL: cfg_sz -2, total sz 22496
[ 3.921969] rtl8723be: Using firmware rtlwifi/rtl8723befw_36.bin
[ 3.925410] ieee80211 phy0: Selected rate control algorithm 'rtl_rc'
[ 3.927407] rtlwifi: rtlwifi: wireless switch is on
[ 4.062246] Bluetooth: hci0: RTL: fw version 0x0e2f9f73
[ 4.276854] rtl8723be 0000:03:00.0 wlo1: renamed from wlan0
[ 7.523502] RTL8208 Fast Ethernet r8169-200:00: attached PHY driver [RTL8208 Fast Ethernet] (mii_bus:phy_addr=r8169-200:00, irq=IGNORE)
$ rfkill list all
0: hci0: Bluetooth
Soft blocked: yes
Hard blocked: no
1: phy0: Wireless LAN
Soft blocked: no
Hard blocked: no
如果有人可以提供一些帮助或指出正确的方向，我会很高兴，因为现在我不知所措，我唯一的解决方案是尝试重新安装旧版本的 Ubuntu（可能是 18.04 LTS）。