On Proxmox VE 8.2.7 I've grabbed the latest Ubuntu and Arch containers:
archlinux-base_20240911-1_amd64.tar.zst
ubuntu-24.04-standard_24.04-2_amd64.tar.zst
And tried deploying them with "unprivileged container" unchecked. On starting the containers and going to the Console tab the console never loads. Setting an IP the address never pings, like the container isn't completing the launch. I see the same behavior on multiple hosts. Deploying the container with "unprivileged container" left checked will work fine.
archlinux-base_20240911-1_amd64.tar.zst
ubuntu-24.04-standard_24.04-2_amd64.tar.zst
And tried deploying them with "unprivileged container" unchecked. On starting the containers and going to the Console tab the console never loads. Setting an IP the address never pings, like the container isn't completing the launch. I see the same behavior on multiple hosts. Deploying the container with "unprivileged container" left checked will work fine.