System Load Indicator only shows as a line unless hovered

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?

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Solution 1:

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).

If you want to try an alternative solution which is compatible with GNOME, you may use a GNOME shell extension called "system-monitor". It does

Display system informations in gnome shell status bar, such as memory usage, cpu usage, network rates…

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You can also install it from the 'Software' application or by running

sudo apt install gnome-shell-extension-system-monitor