Ok, so you'd use the autopilot to give yourself time to evaluate the problem (if possible).
So how would you evacuate smoke from the aircraft? Switch off potential causes, lower the altitude so the air is breathable when the masks run out. Then what? Not like you can open a window.
I was in a training situation years ago with full face protection and an air tank, the room was so full of smoke I couldn't see my hand 2 inches from the mask. Even so I was barely able to see for the next 10 minutes (and I had full face coverage), I could imagine without eye protection you'd be in real trouble.
B777 Flight manual emergency checklist: (there are two other pages for SMOKE / FUMES / FIRE ELEC and SMOKE / FUMES AIR COND)
SMOKE / FUMES REMOVAL:
Condition: Smoke / fumes removal is required.
Oxygen Masks And Smoke Goggles (If Required) .................................. ON
Crew Communications (If Required) ....................................... ESTABLISH
Flight Deck Door................................................................................... CLOSE
Prevents smoke / fumes from penetrating onto the flight deck.
Recirculation Fans Switches...................................................................... OFF
Stops recirculation of smoke / fumes and increases fresh air flow.
Equipment Cooling Switch........................................................................ OFF
Attempts to discharge smoke overboard by using the equipment cooling
override mode.
Note: After 30 minutes of operation at low altitude and low cabin
differential pressure, electronic equipment and displays may fail.
Do not accomplish the following checklist:
EQUIP COOLING OVRD
IF Most Smoke / Fumes Is In Cabin Forward Of Mid-wing And Outflow
Valve Manual Control Available:
Aft Outflow Valve Switch................................................................. MAN
Aft Outflow Valve Manual Switch.............................................. CLOSE
Position outflow valve fully closed.
Concentrates smoke / fumes in the forward part of the aircraft and
attempts to remove it through the forward outflow valve.
Do not accomplish the following checklist:
OUTFLOW VALVE AFT
* * * * ~
IF Most Smoke / Fumes Is In Cabin Aft Of Mid-wing And Outflow Valve
Manual Control Available:
Forward Outflow Valve Switch ................................................... MAN
Forward Outflow Valve Manual Switch ................................. CLOSE
Position outflow valve fully closed.
Concentrates smoke / fumes in the aft part of the aircraft and
attempts to remove it through the aft outflow valve.
Do not accomplish the following checklist:
OUTFLOW VALVE FWD