Cannot update Manjaro Linux: Unknown trust with Archlinux-keyring

Question

I'm trying to update Manjaro but i have problems with signatures. The log shows this message:

error: archlinux-keyring: signature from "Erich Eckner (just to sign arch packages) <[email protected]>" is unknown trust

A similar message appears with every package.

I tried with the commands of this troubleshooting ("Errors about Keys" section) but it don't works.

https://wiki.manjaro.org/index.php/Pacman_troubleshooting

The time of my computer is corretly set, as I see with the command timedatectl.

$ timedatectl
                  Local time: mar 2018-04-24 11:42:17 -03
              Universal time: mar 2018-04-24 14:42:17 UTC
                    RTC time: mar 2018-04-24 14:42:16
                   Time zone: America/Argentina/Buenos_Aires (-03, -0300)
   System clock synchronized: yes
   systemd-timesyncd.service active: yes
             RTC in local TZ: no

I tried refresh the keys of pacman and the mirrorlist, but the error persist. I don't know what could be the problem.

Answer 1

Issue At Hand

You are reporting that you are unable to use Pacman as expected due to the following error:

error: archlinux-keyring: signature from "Erich Eckner (just to sign arch packages) <[email protected]>" is unknown trust

As user GAD3R pointed out there are known fixes for this. However you report that they do not work. The cause of this is due to the fact that your key management has been messed up. You have gotten behind on updates or have something causing this issue.

Fixing your Keyrings

I will be referencing several posts in this answer. You should read over them all in their entirety before making any fixes. The linked post by GAD3R does work you just may need to take additional steps. One series of steps to take is outlined here on the Manjaro forums. Here is another possible fix I found on the Manjaro Forums.

First Try This

sudo pacman -Scc
sudo pacman -Syyu

If that does not work you may need a more involved solution.

Fixing the Keyrings

According to user Chrysostomus on the Manjaro forums you should be able to fix your issue with these commands.

sudo rm -r /etc/pacman.d/gnupg
sudo pacman -Sy gnupg archlinux-keyring manjaro-keyring
sudo pacman-key --init
sudo pacman-key --populate archlinux manjaro 
sudo pacman-key --refresh-keys 
sudo pacman -Sc

Then attempt to run your update. Chrysostomus reports that if this does not work your packages may be corrupt. To fix this you may need to conduct a clean install with the Manjaro ISO.

Alternate Fix

Here is another way to potentially fix the issue from user stephane

sudo pacman-mirrors 
sudo pacman -Syy 
sudo pacman -S archlinux-keyring manjaro-keyring 
sudo pacman-key --init 
sudo pacman-key --populate archlinux manjaro 
sudo pacman-key --refresh-keys
sudo pacman -Syu

Again, your issue might be out of date mirrors or stale or corrupt packages. You could try to fix this by making sure your mirrorlist is completely up to date before you install Manjaro from the latest update.

Conclusion

You need to update your mirrors and keyrings. Potentially you will need to remove the existing keys. A possible explanation is that you fell in an awkward period between a release date and keyring updates. You may need wait for a newer ISO to be released and to reinstall your system with that ISO.

Please comment if you have any questions or issues with this answer. I appreciate feedback to correct any misconceptions and to improve my posts. I can update my answer if you let us know anymore details.

Best of Luck!