I have an issue connecting to the wifi on a fresh install of Lubuntu 20.04 on my lenovo laptop. I have a RTL8723BE PCIe Wireless Network Adapter.
At my friends house I have no trouble connecting to their wifi.
At my house, I can see all the networks (and mine has full signal strength) but when I enter my password to connect, I just get a message from the nm-tray saying "Connection lost, No longer connected to 802-11 wireless..."
What I have tried (without any success)
I plugged the live Lubuntu usb into my other pc (which usually runs Ubuntu
18.04, and has no problems with connecting to the wifi, with
Network controller: Broadcom Inc. and subsidiaries Device 43c3 (rev 04)) and booted
from Lubuntu and still couldn't connect to the wifi. This is the same when I
plug the usb into the laptop and booted from it - also couldn't connect. So I
guess it's not hardware specific...
On the laptop I have tried the following (rebooting in between any changes):
Changing the band from 'Automatic' to 2.4GHz
Selecting Channels 1,6, or 9
Changing IPv4 Method from 'Automatic DHCP' to 'Automatic DHCP (addresses only)'
Changing from 'WPA & WPA2 Personal' to 'LEAP'
cat /etc/modprobe.d/rtl8723be.conf options rtl8723be ant_sel=1
cat /etc/modprobe.d/rtl8723be.conf options rtl8723be ant_sel=2
sudo nmcli networking off sudo nmcli networking on
sudo modprobe -r rtl8723be sudo modprobe rtl8723be
Useful info from running some commands
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@0000:09:00.0 logical name: wlp9s0 version: 00 serial: b0:10:41:c8:d9:e5 width: 64 bits clock: 33MHz capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless configuration: broadcast=yes driver=rtl8723be driverversion=5.11.0-25-generic firmware=N/A latency=0 link=no multicast=yes wireless=IEEE 802.11 resources: irq:19 ioport:3000(size=256) memory:b2400000-b2403fff
sudo lspci 09:00.0 Network controller: Realtek Semiconductor Co., Ltd. RTL8723BE PCIe Wireless Network Adapter