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On a fresh install of 18.10 I attempted to install CPU usage widget

https://extensions.gnome.org/extension/120/system-monitor/

on that link it errors showing :

Although GNOME Shell integration extension is running, native host connector is not detected

pomsky
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Scott Stensland
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1 Answers1

61

On Ubuntu 22.04 clone the repo https://github.com/paradoxxxzero/gnome-shell-system-monitor-applet and do the manual install as per

sudo apt install gir1.2-gtop-2.0 gir1.2-nm-1.0 gir1.2-clutter-1.0 gnome-system-monitor  gettext

cd /tmp  #  could be anywhere ... once installed repo code not used
git clone git@github.com:paradoxxxzero/gnome-shell-system-monitor-applet.git


cd gnome-shell-system-monitor-applet
make install
reboot

If above fails on Ubuntu 22.04 then just use https://extensions.gnome.org/extension/3010/system-monitor-next/

Below is for 20.04 or earlier ...

First install this (its what appears in your error popup):

sudo apt-get update
sudo apt-get upgrade
sudo apt-get install chrome-gnome-shell

However, on a new OS install you will still get errors until you also install these:

#  Ubuntu 20.04
sudo apt-get install libproxy1-plugin-networkmanager gnome-shell-extension-system-monitor

Ubuntu 19.10


sudo apt-get install gir1.2-nm-1.0

Or:

# pre Ubuntu 19.10
sudo apt-get install gir1.2-gtop-2.0 gir1.2-nm-1.0  gir1.2-clutter-1.0

Then bounce your GNOME Shell by typing:

  • Alt+F2, type r then Enter.

or bounce from a terminal by running

killall -3 gnome-shell

Now go back to

and turn on the monitor extension. The resource monitor widget will now appear on desktop top status bar.

UPDATE On Ubuntu 20.04, after doing the above, if it errors out, run the following in a terminal:

wget https://raw.githubusercontent.com/paradoxxxzero/gnome-shell-system-monitor-applet/fac6b7646346264bd75813a9d606dd5ba5152d6b/system-monitor%40paradoxxx.zero.gmail.com/extension.js -O ~/.local/share/gnome-shell/extensions/system-monitor@paradoxxx.zero.gmail.com/extension.js

Then bounce your GNOME Shell using:

  • Alt + F2, type r then Enter

I have run fresh installs of Ubuntu 20.04 on a handful of laptops and some work others fail to run this so the mystery continues...

UPDATE2 Apparently if you are running Chromium as a Snap in Ubuntu 20.04, this is a known bug. Using Firefox one can circumnavigate this issue and it should work.

PS and yes this also works for Ubuntu 21.10 ( as of May 21 2021 )

Scott Stensland
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    Installing chrome-gnome-shell package should be enough to fix the "native host connector is not detected" issue in general. You may need other packages to fulfil the dependencies of the extension in particular. – pomsky Jan 08 '19 at 08:42
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    just a quick addendum - as @Ceisc commented here https://askubuntu.com/a/1034692/888540 - "the chrome-gnome-shell doesn't work if you install the version of Chromium that comes from the Ubuntu Software manager package, but does work if you install Chromium via apt" – hananamar Oct 30 '19 at 08:58
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    When I am trying to install the additional packages with apt, in Ubuntu 19.10 I am getting the following error E: Package 'gir1.2-networkmanager-1.0' has no installation candidate – lefterav Dec 05 '19 at 13:18
  • @lefterav gir1.2-networkmanager-1.0 has been replaced by gir1.2-nm-1.0 – bdombro Apr 13 '20 at 18:45
  • None of these helped me with Chromium (both snap and apt versions). But it did work with Brave browser (which is based on Chromium) with the same Chrome extesion. – Mantas Lukosevicius Apr 24 '20 at 17:52
  • @MantasLukosevicius what Ubuntu are you on ? above works on 20.04 with firefox – Scott Stensland Apr 24 '20 at 18:26
  • @ScottStensland Ubuntu 20.04 – Mantas Lukosevicius Apr 24 '20 at 18:35
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    @ScottStensland what was different for me is that I couldn't run your last wget command, because I didn't have the 'extensions' folder in my '~/.local/share/gnome-shell/' so I created such dir and then that second one. And then i run that command. If this helps at all. – Mantas Lukosevicius Apr 24 '20 at 18:42
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    Unable to locate package gnome-shell-extension-system-monitor on Ubuntu 20 – Michele Piccolini Jun 06 '20 at 16:25
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    I have the same problem as Mantas. Ubuntu 20.04 and Chromium. With Firefox works well – ChesuCR Dec 11 '20 at 19:30
  • I have Ubuntu 20.04LTS. Above suggestion not effective. Same error and no install button visible. – Trunk Apr 03 '22 at 14:23
  • I'm on Firefox. I think this "extension" is a time waster. What will it do anyways ? – Trunk Apr 03 '22 at 14:34
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    This solution doesn't work for me on Ubuntu 21.10. – Caleb Jay Apr 20 '22 at 00:04
  • For Ubuntu 22.04 with snap firefox: sudo apt install gnome-shell-extension-manager – VingtCent Sep 02 '22 at 22:21
  • I got a message about msgfmt not found when running make install. Easily fixed by apt-get installing gettext. Please add it to the apt-get install in your Ubuntu 22.04 instructions. Thanks. – Bryan Larsen Oct 26 '22 at 16:25
  • @BryanLarsen Done – Scott Stensland Oct 26 '22 at 17:20