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linux-firmwareand others) and it broke DNS resolution. i reverted back to previous package versions I had cached (thanks topacman -U /var/cache/pacman/pkg/<package_name>-<package_version>-<architecture>.pkg.tar.zst) and found out that for me,systemd/systemd-libs/systemd-sysvcompatwere the culprits. reverted, rebooted, all OK again.