hi
today (6 febrary 2021) i started to upgrade 5.2.13-arch1-1-ARCH system.

steps:
- pacman -Sy to make sure everything is working before upgrade
- pacman-key --populate archlinux
- pacman -Syu archlinux-keyring

every question was answered by default. system downloaded all packages without any problems.

but checking keys in keyring failed: key ... could not be looked up remotely.

i so looked for alike problems on the internet. i then went through <wiki.archlinux.org/index.php/Pacman/Package_signing>. at the end i followed <Resseting all keys>. this usualy helps. goal was to install an uptodate keyring package.

pacman -S archlinux-keyring solved:
core/archlinux-keyring 20190827-1 20210110-1 0.38MiB
errror: key "6D42BDD116E0068F could not be looked up remotely

[core] mirrorlist point to
http://mirror.puzzle.ch...
http://pkg.adfinis-sygroup.ch

i got the actual pacman-mirrorlist (without any problems) and used the first two servers from germany. with the same result.

i so do think the package <archlinux-keyring> is signed with a unknown key. is there any functionality to have packages verified on the original site? of course configuring <SigLevel> to <Never> works but would mean opening the miracle at it's core.

please recommend the process for resolving this problem.

thank you.