Might want to look at permissions and ownership on /dev/vchiq. On a Pi running Raspberry Pi OS, this is as follows:
crw-rw---- 1 root video 243, 0 Aug 25 13:06 vchiq However, on a Pi 4B running ubuntu focal arm64 I get: crw------- 1 root root 236, 0 Apr 1 17:23 vchiq The result is that the default user, ubuntu, cannot run vcgencmd without using sudo. On a Pi running Pi OS, the default user, pi, doesn't need sudo, thanks to the difference in group permissions on /dev/vchiq, plus group ownership being video instead of root. (ubuntu is also in the video group). I couldn't find where in Pi OS this was defined, but the following will set permission and ownership to match Raspberry Pi OS: $ echo 'SUBSYSTEM=="vchiq",GROUP="video",MODE="0660"' | sudo tee /etc/udev/rules.d/99-vchiq.rules -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1883111 Title: [needs-packaging] raspberrypi-userland To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+bug/1883111/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
