Ubuntu 20.04.1 / Caffeine Indicator does not appear in status bar

Solution 1:

The caffeine package includes three commands: caffeine,caffeinate and caffeine-indicator.

The caffeine is what is responsible for preventing idle, but it only runs in the background. You need to run the caffeine-indicator to control it form topbar.

Having both of those in the startup apps (one entry for /usr/bin/caffeine and one for /usr/bin/caffeine-indicator) works for me.

I'm on 20.04 and I've installed caffeine 2.9.4-2 using sudo apt install caffeine (the same as apt-get, btw)

Solution 2:

press Super and type extensions, then find caffeine there and go to its setting and enable show on top panel