It is a quite sensible idea. The userspace X server SHOULD be running under a non-root user, with appropriate fine-grained privs granted to it. "I need root to do graphics" is a myopic, antiquated view of the world.
Did I say the X server? There are policy decisions that are root only also authorisation of processes to render etc.. I'm not sure we can punt all that in-kernel. Dave.
Jeff
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