As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CAPTAIN REPORTED SMOKE/ODOR IN THE COCKPIT AFT A L PACK AUTO FAIL CAUTION MESSAGE. AFTER SHUTTING DOWN THE LT PACK THE SMOKE AND ODOR DISSIPATED AND THE FLIGHT CONTINUED WITH THE LT PACK OFF. MAINTENANCE DETERMINED THE CAUSE OF THE SMOKE/ODOR WAS DUE TO FAILURE OF THE LT ACM AND DEFERRED THE LT PACK.