On my brand new HP laptop the WiFi connection suddenly fails for no particular reason. Available networks are displayed, but attempting a connection never succeeds. This has happened twice now since I bought the machine about a month ago. My other machines and the telephone connect fine, so I know the network is healthy. And yes, I use the correct password. Network secured by WPA2.
lspci |grep Net gives
01:00.0 Network controller: Realtek Semiconductor Co., Ltd. RTL8822CE 802.11ac PCIe Wireless Network AdapterI have tried to restart the network driver (sudo systemctl restart NetworkManager.service, or by using the GUI), without any success.
Unfortunately, the only solution seems to be a complete restart of the machine. That always works, but why?? I hate rebooting, should not be necessary for a stable system. The machine is always on, but is suspended every might.
Right NOW it's OK of course – I'm writing this on it. I would love to have other things to try the next time this happens. Maybe look at something in /var/log? sudo dmesg doesn't make me wiser. rfkill reports no blocking.
Note also that there is no Windows on this machine; I cleared the disk and installed Ubuntu 20.10 first thing when I bought it :)
Addition, after some valuable input here:
I have now looked at the journals, sudo journalctl -b X -u NetworkManager where X is either 0 or -1 to select last or previous boot. Output from journalctl is quite large, and with very long lines not readable here in any case. Including the whole file is not feasible, and a link to the file on my local machine cannot be done. If someone thinks the log could contain useful information, and could also give me a hint on how to publish a 50kb file here, please do :)
Some warnings I spotted that might be related:
Apr 13 19:16:25 linn NetworkManager[590]: <warn> [1618334185.4874] ifupdown: interfaces file /etc/network/interfaces doesn't exist
Apr 13 19:16:26 linn NetworkManager[590]: <warn> [1618334186.4560] Error: failed to open /run/network/ifstate
