In my laptop (Asus VivoBook, i5 8th gen, 256GB+1TB, 8GB ram), using Ubuntu 18.04 (dual boot with Windows 10), it was showing 100% CPU used when Wi-Fi is on (no other processes were running). So that the laptop temperature was unnecessarily increasing and consumed power.
How can I solve this problem?
In my case it is solved by stopping the cups-browsed, detailed steps are given below:
Install nethogs:
sudo apt-get install nethogs
followed by
sudo nethogs wlan0
It was showing that some process is running through the Wi-Fi, called /usr/sbin/cups-browsed, which is basically searching the wireless printers and devices.
For that we have to stop cups-browsed as follows
sudo systemctl stop cups-browsed
sudo systemctl disable cups-browsed
Output will look like:
Synchronizing state of cups-browsed.service with SysV service script with /lib/systemd/systemd-sysv-install.
Executing: /lib/systemd/systemd-sysv-install disable cups-browsed
You may still start/stop the service manually if you wish, as given in the link How do I disable automatic remote printer installation?:
sudo systemctl start cups-browsed
sudo systemctl stop cups-browsed