Since few days, once logged in elementary OS 0.4.1 Loki, when I have to enter my password (for exemple to update), I can't do it because the authentification box is kind of "shaking" with a high frequency and there's two different error messages displayed enter image description here. The two error messages displayed (translated from french) are:

  • incorrect permissions on /usr/lib/policykit-1/polkit-agent-helper-1 (needs to be setuid root)

  • identification failed.Try again.

I tried to make a manual update via the terminal but I can't fully complete it (see second screenshot)terminal screenshot

Thanks for your help.:)


One of your error message is a known bug. Unfortunately there is no workaround yet. You can assign this bug, so you are pinged, when something new happens.

  • Thanks for taking time to help me. Since then, the situation became fare worse (black screen and strange displays), I reinstall elementary, no problem until now. :)
    – Gendar
    Aug 17 '18 at 15:09

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