I suffer from a slow internet on Ubuntu 20.04 hosted on a VM. I followed the solution in Ubuntu 20.04 Network Performance Extremely Slow
namely in /etc/NetworkManager/conf.d/default-wifi-powersave-on.conf
I modified the wifi.powersave
value from 3 to 2, saved changes and rebooted.
After this change I have no internet. Also after modifying the wifi.powersave
value back to 3 and rebooting I have no internet.
ip route show
gives an empty output.
nmcli connection
gives
Error: NetworkManager is not running
sudo systemctl restart network-manager.service
gives
Job for NetworkManager.service failed because the control process exited with error code. See "systemctl status NetworkManager.service" and "journalctl -xe" for details.
systemctl status NetworkManager.service
gives
● NetworkManager.service - Network Manager
Loaded: loaded (/lib/systemd/system/NetworkManager.service; enabled; vendor preset: enabled)
Active: activating (auto-restart) (Result: exit-code) since Tue 2022-11-08 16:47:36 EET; 20ms ago
Docs: man:NetworkManager(8)
Process: 6001 ExecStart=/usr/sbin/NetworkManager --no-daemon (code=exited, status=1/FAILURE)
Main PID: 6001 (code=exited, status=1/FAILURE)
Nov 08 16:47:36 v systemd[1]: NetworkManager.service: Main process exited, code=exited, status=1/FAILURE
Nov 08 16:47:36 v systemd[1]: NetworkManager.service: Failed with result 'exit-code'.
Nov 08 16:47:36 v systemd[1]: Failed to start Network Manager.
journalctl -xe
shows a problem:
-- A start job for unit NetworkManager.service has begun execution.
--
-- The job identifier is 2760.
Nov 08 16:32:50 v NetworkManager[3819]: Failed to read configuration: file /etc/NetworkManager/conf.d/.#default-wifi-powersave-on.conf not found
Nov 08 16:32:50 v systemd[1]: NetworkManager.service: Main process exited, code=exited, status=1/FAILURE
-- Subject: Unit process exited
-- Defined-By: systemd
-- Support: http://www.ubuntu.com/support
What could I check and fix?
--
I was able to fix the problem by
sudo ln -sf /etc/NetworkManager/conf.d/default-wifi-powersave-on.conf /etc/NetworkManager/conf.d/.#default-wifi-powersave-on.conf