Created attachment 523348 [details] simple consolekit seat hook shell script On Gentoo Nvidia device files have permission of 0660, and are part of video group, this makes it necessary to be part of the video group to have a graphical X session; On Arch Linux Nvidia device files simply have permission of 0666, so you can use them without having to add the new user to video group; instead of doing that a simple hook can be added to "/usr/lib/ConsoleKit/run-seat.d", named something like "nvidia-acl.ck" which adds an acl entry for the currently active session user to all Nvidia device files. A working script is provided in attachments.
consolekit is dead and gone.
