I installed the System Load Indicator GNOME extension on my Ubuntu 18.04, but for some reason, instead of showing a proper graph for CPU usage, it only shows a very thin line that seems to be a small portion of the actual graph. If I hover over it, the proper graph shows. How to make it show the whole graph all the time?
Although System Load Indicator (
indicator-multiload) works well with desktop environments like Unity, MATE etc., it's not very compatible with GNOME 3 (default in Ubuntu 17.10 and later).
Display system informations in gnome shell status bar, such as memory usage, cpu usage, network rates…
You can also install it from the 'Software' application or by running
sudo apt install gnome-shell-extension-system-monitor
or until (if ever) they fix it, you could try: https://gitlab.gnome.org/GNOME/gnome-usage which, yes, doesn't do tray at the moment