Pamac upgrade -a and package manager: authentication failed without even typing my password

[Aragorn]

It’s a transitory polkit problem.

@discobot

problems with polkit

After a change in polkit, some users report permission problems. Different solutions are suggested:

• rebooting
• reinstalling polkit (with sudo pacman -S polkit, since pamac may not work in that case)
• fixing the suid permissions manually with

sudo chmod 4755 /usr/lib/polkit-1/polkit-agent-helper-1

• fixing the file permissions manually
  The proper permissions are:

drwxr-xr-x (755) - root:root - Directory
-rwxr-xr-x (755) - root:root - Executables
-rw-r--r-- (644) - root:root - Rules files

so to fix you use

sudo chown -R root:root /usr/lib/polkit-1/
sudo chmod 755 /usr/lib/polkit-1/
sudo chmod 755 /usr/lib/polkit-1/polkitd /usr/lib/polkit-1/polkit-agent-helper-1
sudo chmod 644 /usr/lib/polkit-1/rules.d/*