If you run ck-list-sessions, you'll see "active = FALSE" for each seat that has "-novtswitch -sharevts" in the X command line. I believe this is why you can't mount USB thumb drives from those seats (policykit sees the seat as inactive so it doesn't mount the drive for that seat).
If you run ck-list-sessions, you'll see "active = FALSE" for each seat that has "-novtswitch -sharevts" in the X command line. I believe this is why you can't mount USB thumb drives from those seats (policykit sees the seat as inactive so it doesn't mount the drive for that seat).