As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING THE CLIMB PHASE OF FLIGHT THE STATUS MESSAGE CABIN ALT AUTO 1 AND CABIN ALT AUTO 2 APPEARED ON THE EICAS. AIRCRAFT RETURNED TO DFW. MAINTENANCE PERFORMED FIM 21-31-00 PAGE 105, RESET BOTH SYSTEM CONTROLLERS. AIRCRAFT OK FOR SERVICE.