I've two Raspberry PI V2 cameras connected to my Raspberry Pi compute module 4 carrier.
The OS is (64bit) Bullseye 11
kernel is 5.15.76-v8+ libcamera-apps build: 9c5d3191b3f4 02-12-2022 (20:10:40) libcamera build: v0.0.2+47-0684c373
The issue os when I attempt to run libcamera-hello as non-root user I get an error message "Could not open any dmaHeap device". The same command run as root works as expected.
/dev/media0 has the permissions:-
crw-rw---- 1 root video 237, 0 Feb 15 14:45 /dev/media0
And the non-privledged user I'm using is in the 'video' group